Package 'osdatahub' reference manual

Title:	Easier Interaction with the Ordnance Survey Data Hub
Description:	Ordnance Survey ('OS') is the national mapping agency for Great Britain and produces a large variety of mapping and geospatial products. Much of OS's data is available via the OS Data Hub <https://osdatahub.os.uk/>, a platform that hosts both free and premium data products. 'osdatahub' provides a user-friendly way to access, query, and download these data.
Authors:	Chris Jochem [cre, aut], Ordnance Survey Ltd [cph, fnd]
Maintainer:	Chris Jochem <[email protected]>
License:	MIT + file LICENSE
Version:	0.2.0
Built:	2024-11-26 06:47:16 UTC
Source:	CRAN

Return the geometry of a British National Grid square

Description

Convert a valid British National Grid (BNG) grid reference string into a grid square with the resolution implied by the length of the reference string.

Usage

bng_to_geom(grid_ref, returnType = c("wkt", "geojson", "geos", "sf"))
bng_to_geom(grid_ref, returnType = c("wkt", "geojson", "geos", "sf"))

Arguments

`grid_ref`	(character) BNG grid reference (required).
`returnType`	(character) Representation for the returned geometry. Choose `'wkt'` or `'geojson'` to return the geometry in Well-Known Text format or GeoJSON, respectively, `'geos'` to return an object of class `geos` or `'sf'` for a Simple Features object of class `sf`. Default is WKT format.

Details

The National Grid is a unique reference system that covers Great Britain in a series of grid squares at multiple scales. Grid references begin with 2 letters to identify 100km squares followed by a series of digits to identify quadrants nested within. For more information, see https://www.ordnancesurvey.co.uk/documents/resources/guide-to-nationalgrid.pdf

The purpose of this function is to generate geometries based on the extent of the grid square which can be used as spatial filters in OS Data Hub API queries.

Note that all geometries returned will have a coordinate reference system (CRS) of a EPSG:27700. The sf package must be installed in order to return an object of class sf.

Value

The coordinates of the grid square boundary in either Well-Known Text (WKT) format, GeoJSON format, an object of class geos or as a Simple Features object of class sf.

Examples

bng_to_geom('TL63')
bng_to_geom('TL683365', returnType = 'geojson')

bng_to_geom('TL63')
bng_to_geom('TL683365', returnType = 'geojson')

Download OS premium data packages

Description

Main function for downloading OS data packages to your local machine.

Usage

download_os_datapackages(product, ...)

## S3 method for class 'package_list'
download_os_datapackages(
  product,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'data.frame'
download_os_datapackages(
  product,
  version,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'numeric'
download_os_datapackages(
  product,
  version,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)
download_os_datapackages(product, ...)

## S3 method for class 'package_list'
download_os_datapackages(
  product,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'data.frame'
download_os_datapackages(
  product,
  version,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'numeric'
download_os_datapackages(
  product,
  version,
  file_name,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

Arguments

`product`	A `product_list` object retrieved and filtered using `list_os_datapackages`. Alternatively, a `data.frame` object or integer or character string of a product ID that can be filtered further.
`...`	Additional parameters. Not currently used.
`file_name`	(character) Filter downloads to only include those with this file name. Optional.
`output_dir`	Path to the directory where the downloaded files will be saved.
`overwrite`	Boolean. Should existing files be overwritten? Default is `FALSE`.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`version`	(numeric or character) Retrieve information on a specific version(s) of a data product. Required when `product` is a `data.frame`.

Details

The OS Downloads API assists with the discovery and download of OS OpenData and OS premium data packages. This function is used as the main step to download data packages to your local machine. It is designed to work best after list_os_datapackages is first used to search and filter for the specific download product. The package_list returned by the listing step can be used as the input value to download the desired files. Alternatively, it is possible to supply a product and version IDs directly when they are already known.

Before downloading a data package, it must be ordered online. See: https://osdatahub.os.uk/downloads/packages.

For more information on the Downloads API, see https://osdatahub.os.uk/docs/downloads/technicalSpecification.

Value

Silently returns the directory where the downloaded files are stored.

Examples

## Not run: 
# Search and filter available open products.
pkg_list <- list_os_datapackages()

# Use the package list to initiate a download.
# Note: 'version' will vary.
download_os_datapackages(pkg_list, version = 123, output_dir = tempdir())

## End(Not run)

## Not run: 
# Search and filter available open products.
pkg_list <- list_os_datapackages()

# Use the package list to initiate a download.
# Note: 'version' will vary.
download_os_datapackages(pkg_list, version = 123, output_dir = tempdir())

## End(Not run)

Download OS OpenData Products

Description

Main function for downloading OS open data product files to your local machine.

Usage

download_os_opendata(product, ...)

## S3 method for class 'product_list'
download_os_opendata(
  product,
  file_name,
  file_format,
  area,
  output_dir,
  overwrite = FALSE,
  ...
)

## S3 method for class 'character'
download_os_opendata(
  product,
  file_name,
  file_format,
  file_subformat,
  area,
  output_dir,
  overwrite = FALSE,
  ...
)
download_os_opendata(product, ...)

## S3 method for class 'product_list'
download_os_opendata(
  product,
  file_name,
  file_format,
  area,
  output_dir,
  overwrite = FALSE,
  ...
)

## S3 method for class 'character'
download_os_opendata(
  product,
  file_name,
  file_format,
  file_subformat,
  area,
  output_dir,
  overwrite = FALSE,
  ...
)

Arguments

`product`	A `product_list` object retrieved and filtered using `list_os_opendata`. Alternatively, a data product name as a character string.
`...`	Additional parameters. Not currently used.
`file_name`	(character) Filter downloads to only include those with this file name. Optional.
`file_format`	(character) Filter downloads to only include those with this format. Optional.
`area`	(character) Filter downloads for only this area. Use 'GB' for all Great Britain. Optional.
`output_dir`	Path to the directory where the downloaded files will be saved.
`overwrite`	Boolean. Should existing files be overwritten? Default is `FALSE`.
`file_subformat`	(character) Filter downloads to only include those with this subformat. Optional and only used when `product` is a character string.

Details

The OS Downloads API assists with the discovery and download of OS OpenData and OS Premium data packages. This function is used as the main step to download open data products to your local machine. It is designed to work best after list_os_opendata is first used to search and filter for the specific download product. The product_list returned by the listing step can be used as the input value to download the desired files. Alternatively, it is possible to supply a product name and filtering options based on file formats and areas.

The optional area filter is based on two-letter British National Grid tiles. Use 'GB' for all of Great Britain. Valid values area: GB, HP, HT, HU, HW, HX, HY, HZ, NA, NB, NC, ND, NF, NG, NH, NJ, NK, NL, NM, NN, NO, NR, NS, NT, NU, NW, NX, NY, NZ, OV, SD, SE, TA, SH, SJ, SK, TF, TG, SM, SN, SO, SP, TL, TM, SR, SS, ST, SU, TQ, TR, SV, SW, SX, SY, SZ, TV.

For more information on the Downloads API, see https://osdatahub.os.uk/docs/downloads/technicalSpecification.

Value

Silently returns the directory where the downloaded files are stored.

Examples


# Search and filter available open products.
prod_list <- list_os_opendata('OpenGreenSpace',
                              file_format = 'GeoPackage',
                              area = 'GB')

# Use the product list to initiate a download.
download_os_opendata(prod_list, output_dir = tempdir())

# Combine search and download.
# Be sure to know the products to avoid downloading more data than desired.
download_os_opendata(product = 'OpenGreenSpace',
                     file_format = 'GeoPackage',
                     area = 'GB',
                     output_dir = tempdir())


# Search and filter available open products.
prod_list <- list_os_opendata('OpenGreenSpace',
                              file_format = 'GeoPackage',
                              area = 'GB')

# Use the product list to initiate a download.
download_os_opendata(prod_list, output_dir = tempdir())

# Combine search and download.
# Be sure to know the products to avoid downloading more data than desired.
download_os_opendata(product = 'OpenGreenSpace',
                     file_format = 'GeoPackage',
                     area = 'GB',
                     output_dir = tempdir())

Create extents from geometries

Description

Provide extents from various types of input features and geometries to be used as filters in OS Data Hub API queries.

Usage

extent_from_bbox(bbox, crs = "crs84", returnType = c("qExtent", "geos", "wkt"))

extent_from_polygon(
  polygon,
  crs = "crs84",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_geojson(
  geojson,
  crs = "crs84",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_radius(
  centre,
  radius,
  crs = "epsg:27700",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_bng(grid_ref, returnType = c("qExtent", "geos", "wkt"))
extent_from_bbox(bbox, crs = "crs84", returnType = c("qExtent", "geos", "wkt"))

extent_from_polygon(
  polygon,
  crs = "crs84",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_geojson(
  geojson,
  crs = "crs84",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_radius(
  centre,
  radius,
  crs = "epsg:27700",
  returnType = c("qExtent", "geos", "wkt")
)

extent_from_bng(grid_ref, returnType = c("qExtent", "geos", "wkt"))

Arguments

`bbox`	A bounding box, passed as a numeric vector in (xmin, ymin, xmax, ymax) or a `data.frame` object with numeric columns.
`crs`	(character or numeric) The identifier for coordinate reference system information for the feature, either in the format "epsg:xxxx" or an EPSG number. e.g. British National Grid can be supplied as "epsg:27700" or 27700. Available CRS values are: EPSG:27700, EPSG:4326, EPSG:7405, EPSG:3857, and CRS84. Defaults to CRS84.
`returnType`	(character) Define the object returned. The default is `'qExtent'` to define a "query extent" object expected internally by `osdatahub`. Other options are `'wkt'` to return the geometry in Well-Known Text format or `'geos'` to return an object of class `geos`.
`polygon`	A polygon specified in a WKT string, an object of class `geos`, or an object of class `sf`.
`geojson`	A character string defining a polygon in GeoJSON format.
`centre`	Either a numeric vector with coordinates in the form (x, y), a Point object in a WKT string, a Point as a `geos` geometry or an object of class `sf`.
`radius`	(numeric) The radius of the circle in meters.
`grid_ref`	A character string with a British National Grid reference. The extent is formed by the grid square of the reference.

Details

When defining an extent by a radius around a point, the CRS must be either 'epsg:27700' or 'epsg:3857' which implies the units of the distance for the radius are meters.

The qExtent return option identifies a simple class of objects containing a polygon of the extent in WKT format, the bounding box coordinates, and a CRS string. It is intended to be used internally by functions in osdatahub.

Value

The coordinates of the polygon boundary as defined by returnType.

Examples

extent_from_bbox(c(600000, 310200, 600900, 310900), "epsg:27700", returnType = 'wkt')

extent_from_radius(c(441317, 112165), radius = 200)

extent_from_bng("SU3715")

extent_from_bbox(c(600000, 310200, 600900, 310900), "epsg:27700", returnType = 'wkt')

extent_from_radius(c(441317, 112165), radius = 200)

extent_from_bng("SU3715")

Retrieve an extent for ONS geographies

Description

Retrieve an extent for ONS geographies

Usage

extent_from_ons_code(ons_code, returnType = c("qExtent", "geos", "wkt"))
extent_from_ons_code(ons_code, returnType = c("qExtent", "geos", "wkt"))

Arguments

`ons_code`	(character) A single ONS code representing a statistical area.
`returnType`	(character) Define the object returned. The default is `'qExtent'` to define a "query extent" object expected internally by `osdatahub`. Other options are `'wkt'` to return the geometry in Well-Known Text format or `'geos'` to return an object of class `geos`.

Details

The Office for National Statistics (ONS) maintains a source of official geographies for the UK, such as county boundaries, electoral wards, parishes, and census output areas. These boundaries are commonly used for data analysis, particularly of socio-economic factors. A full list of available ONS geographies can be found here: https://statistics.data.gov.uk:443/atlas/resource?uri=http://statistics.data.gov.uk/id/statistical-geography/K02000001.

When returning a geos object, the coordinate reference system attribute will be set to CRS:84 by default and not to a full CRS definition.

Value

The coordinates of the polygon boundary.

Examples


ext <- extent_from_ons_code("E05002470", returnType = 'wkt')


ext <- extent_from_ons_code("E05002470", returnType = 'wkt')

Retrieve ONS geographies

Description

Query the Office for National Statistics online geography resources.

Usage

get_ons_geom(ons_code, returnType = c("wkt", "geojson", "geos", "sf"))
get_ons_geom(ons_code, returnType = c("wkt", "geojson", "geos", "sf"))

Arguments

`ons_code`	(character) A single ONS code representing a statistical area.
`returnType`	(character) Representation for the returned geometry. Choose `'wkt'` or `'geojson'` to return the geometry in Well-Known Text format or GeoJSON, respectively, `'geos'` to return an object of class `geos` or `'sf'` for a Simple Features object of class `sf`. Default is WKT format.

Details

When returning a geos object, the coordinate reference system attribute will be set to CRS code 84 by default and not to a full CRS definition. The sf package must be installed in order to return an object of class sf.

Data from the ONS are provided under the terms of the Open Government Licence https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. For more information, please see: https://www.ons.gov.uk/methodology/geography/licences.

Value

The coordinates of the polygon boundary in either Well-Known Text (WKT) format, GeoJSON format, an object of class geos or as a Simple Features object of class sf.

Examples


# Retrieve geography.
geog <- get_ons_geom("E05002470")


# Retrieve geography.
geog <- get_ons_geom("E05002470")

Print the currently accepted EPSG codes.

Description

Convenience function primarily used internally by osdatahub.

Usage

list_crs(...)
list_crs(...)

Arguments

...

Not currently used.

Value

(Invisible) Vector of character strings.

Examples

list_crs()

list_crs()

Retrieve OS NGD Feature Collections

Description

Query the osdatahub NGD Features API to gather information on available data collections. An API key is not required for this query.

Usage

list_ngd_collections(simple = TRUE)
list_ngd_collections(simple = TRUE)

Arguments

simple

(logical) Should only the collection ID be returned? Default is TRUE. Use FALSE to return the detailed output.

Details

OS NGD themes and collections have been created to group similar geographic entities and data types, making it quicker and easier to identify the data you need. The OGC API - Features standard also references feature collections, and in the context of OS NGD datasets, this is equivalent to feature types. The following naming convention has been applied to the feature collections: theme-collection-featuretype. Short codes have been used for both the theme and collection to keep the feature collection names manageable and not overly long. An example of the short codes used is: 'bld-fts-buildingline'. For more information, see https://osdatahub.os.uk/docs/ofa/technicalSpecification.

Value

If simple is TRUE then return a character vector of available collections identified by their shortened code, else return a data.frame with the full details.

Examples


ngd_collections <- list_ngd_collections(simple = TRUE)
ngd_collections[1:10]

ngd_collections <- list_ngd_collections(simple = TRUE)
ngd_collections[1:10]

Retrieve information on premium OS data packages

Description

Query the osdatahub Downloads API to gather information on available downloads for a specific OS premium data package based on given filters.

Usage

list_os_datapackages(product_id, version_id, key = get_os_key(), ...)
list_os_datapackages(product_id, version_id, key = get_os_key(), ...)

Arguments

`product_id`	(numeric or character) Retrieve information on a specific data product. Optional.
`version_id`	(numeric or character) Retrieve information on a specific version of a data product. Optional and only available when `product_id` has been specified.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`...`	Additional paramters. Not currently used.

Details

The OS Downloads API assists with the discovery and download of OS OpenData and OS premium data packages. This function is used for initial listing and discovery of premium products. Use the product and version IDs from this list to filter further or to initiate a download.

Before downloading a data package, it must be ordered online. See: https://osdatahub.os.uk/downloads/packages.

When a product_id is not specified then all available data packages are listed. The version_id filter can be used to find the specific download, but this filter is only valid when a specific product has been specified first.

For more information on the Downloads API, see https://osdatahub.os.uk/docs/downloads/technicalSpecification.

Value

A data.frame or a package_list, which extends a data.frame, containing the information on downloadable files from the Downloads API.

Examples

## Not run: 
# Retrieve a data.frame listing all OS Data Packages available.
# An API key is required and the packages must be ordered online first.
dp <- list_os_datapackages()

# Retrieve a specific data package.
# Note: 'product_id' will vary.
dp <- list_os_datapackages(product_id = 1234)

## End(Not run)

## Not run: 
# Retrieve a data.frame listing all OS Data Packages available.
# An API key is required and the packages must be ordered online first.
dp <- list_os_datapackages()

# Retrieve a specific data package.
# Note: 'product_id' will vary.
dp <- list_os_datapackages(product_id = 1234)

## End(Not run)

Retrieve information on OS OpenData Downloads

Description

Query the osdatahub Downloads API to gather information on available data collections. An API key is not required to list OS OpenData.

Usage

list_os_opendata(product_id, file_name, file_format, file_subformat, area, ...)
list_os_opendata(product_id, file_name, file_format, file_subformat, area, ...)

Arguments

`product_id`	(character) Retrieve information on a specific data product. Optional.
`file_name`	(character) Filter downloads to only include those with this file name. Optional.
`file_format`	(character) Filter downloads to only include those with this format. Optional.
`file_subformat`	(character) Filter downloads to only include those with this subformat. Optional.
`area`	(character) Filter downloads for only this area. Use 'GB' for all Great Britain. Optional.
`...`	Additional paramters. Not currently used.

Details

The OS Downloads API assists with the discovery and download of OS OpenData and OS premium data packages. This function is used for initial listing and discovery of open data products. Use the product ID from this list to filter further or to initiate a download.

When a product_id is not specified then all available open data is listed. Additional filters (i.e. file_name, file_format, file_subformat, area) can be used to find the specific download, but these filters are only valid when a specific product has been specified first.

For more information on the Downloads API, see https://osdatahub.os.uk/docs/downloads/technicalSpecification.

Value

A data.frame or a product_list, which extends a data.frame, containing the information on downloadable files from the Downloads API.

Examples


# Retrieve a data.frame listing all OS OpenData products.
opendata <- list_os_opendata()
opendata[, c("name", "url")]


# Retrieve a data.frame listing all OS OpenData products.
opendata <- list_os_opendata()
opendata[, c("name", "url")]

Query the OS Maps API

Description

Retrieve pre-rendered tiles from the web maps service of the Maps API in the Ordnance Survey Data Hub.

Usage

query_maps(
  x,
  layer = c("Road_27700", "Road_3857", "Outdoor_27700", "Outdoor_3857", "Light_27700",
    "Light_3857", "Leisure_27700"),
  zoom,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'qExtent'
query_maps(
  x,
  layer = c("Road_27700", "Road_3857", "Outdoor_27700", "Outdoor_3857", "Light_27700",
    "Light_3857", "Leisure_27700"),
  zoom,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)
query_maps(
  x,
  layer = c("Road_27700", "Road_3857", "Outdoor_27700", "Outdoor_3857", "Light_27700",
    "Light_3857", "Leisure_27700"),
  zoom,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

## S3 method for class 'qExtent'
query_maps(
  x,
  layer = c("Road_27700", "Road_3857", "Outdoor_27700", "Outdoor_3857", "Light_27700",
    "Light_3857", "Leisure_27700"),
  zoom,
  output_dir,
  overwrite = FALSE,
  key = get_os_key(),
  ...
)

Arguments

`x`	Object defining the query extent. Should be of type `qExtent` created by the `extent_from_*` functions.
`layer`	(character) The name of the layer to query. See details.
`zoom`	(numeric) The zoom level of the tiles to return. If omitted, a suitable zoom level will be estimated. See details.
`output_dir`	(character) Path to the directory where the downloaded tiles will be saved.
`overwrite`	Boolean. Should existing files be overwritten? Default is `FALSE`.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`...`	Additional parameters (not currently used).

Details

The OS Maps API serves pre-rendered raster tiles and is available in two projections; British National Grid and Web Mercator. This function provides basic access to download these tiles to your local machine.

Alternatively, you can request the maps using the Open Geospatial Consortium Web Map Tile Service (WMTS) standard or RESTful ZXY for easy access/visualisation in most GIS software and web mapping applications. More information on the Maps API is available from: https://osdatahub.os.uk/docs/wmts/technicalSpecification.

The parameter x currently only accepts a query extent created from extent_from_* family of functions. The coordinate reference system of this extent must match the coordinate reference system of the returned tiles (i.e. only EPSG:27700 and EPSG:3857 are accepted).

The available layers are Road, Outdoor, Light in both 27700 and 3857, plus Leisure in 27700. These should be specified as combined strings to the layer argument, e.g. 'Road_27700'.

The zoom levels available vary based on the projection of the tile matrix set. EPSG:3857 is from 7 to 20 and EPSG:27700 is from 0 to 13. See the technical specifications for more information on the scale and resolution: https://osdatahub.os.uk/docs/wmts/technicalSpecification

Value

A list of file paths to the downloaded image tiles, their bounding boxes, and coordinate reference system information.

Examples


# Define an extent.
OS_ext <- extent_from_bng('SU3715')

# Download tiles.
imgTile <- query_maps(OS_ext,
                      layer = 'Light_27700',
                      output_dir = tempdir())

# The tiles can be merged together and georeferenced for spatial applications.

# Define an extent.
OS_ext <- extent_from_bng('SU3715')

# Download tiles.
imgTile <- query_maps(OS_ext,
                      layer = 'Light_27700',
                      output_dir = tempdir())

# The tiles can be merged together and georeferenced for spatial applications.

Query the OS Places API

Description

Takes a pair of coordinates (X, Y)/(Lon, Lat) as an input to determine the closest address.

Usage

query_nearest_places(
  point,
  point_crs,
  radius = 100,
  output_crs = "EPSG:27700",
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)
query_nearest_places(
  point,
  point_crs,
  radius = 100,
  output_crs = "EPSG:27700",
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

Arguments

`point`	A set of coordinates as a numeric vector, an object of class `geos`, or an object of class `sf`
`point_crs`	(character or numeric) The identifier for coordinate reference system information for the point feature.
`radius`	(numeric) The search radius in metres (max. 1000). Defaults is 100.
`output_crs`	(character or numeric) The output CRS. Defaults to “EPSG:27700”.
`classification_code`	Classification codes to filter query by.
`logical_status_code`	Logical status code to filter query by.
`dataset`	(character) The dataset to return. Multiple values can be provided as a vector. Default is 'DPA'.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`returnType`	(character) Return the query results as the raw `'geojson'`, a nested `'list'` object containing the returns, or convert them into Simple Features and return an object of class `'sf'`.
`...`	Additional parameters (not currently used).

Details

The OS Places API provides a detailed view of an address and its life cycle. Use this function to query Places to find the address nearest to a given point location.

The Places API contains all the records of AddressBase® Premium and AddressBase® Premium – Islands and so provides all the information relating to an address or property from creation to retirement. It contains local authority, Ordnance Survey and Royal Mail® addresses, current addresses, and alternatives for current addresses, provisional addresses (such as planning developments) and historic information, plus OWPAs and cross references to the OS MasterMap® TOIDS®. OS Places API contains addresses located within the United Kingdom, Jersey, Guernsey and the Isle of Man. For address records in Jersey and Guernsey the coordinates will be ‘0.0’ as they fall outside of the British National Grid. This means they are not compatible with the GeoSearch operations.

Technical details on the Places API are documented on the Data Hub: https://osdatahub.os.uk/docs/places/technicalSpecification.

Note: the Places API requires a Premium API key.

Value

A GeoJSON string with the results of the API query, a list object, or an object of class sf based on the returnType parameter.

Examples


# Find address nearest to a point
pt <- c(437292.4, 115541.9)

results <- query_nearest_places(pt, point_crs = 'EPSG:27700')

# Find address nearest to a point
pt <- c(437292.4, 115541.9)

results <- query_nearest_places(pt, point_crs = 'EPSG:27700')

Query the OS NGD Features API

Description

Retrieve features from a given Collection of the National Geographic Database in the Ordnance Survey Data Hub.

Usage

query_ngd(x, ...)

## S3 method for class 'character'
query_ngd(
  x,
  collection,
  crs = "crs84",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'qExtent'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'geos_geometry'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'sf'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'sfc'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)
query_ngd(x, ...)

## S3 method for class 'character'
query_ngd(
  x,
  collection,
  crs = "crs84",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'qExtent'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'geos_geometry'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'sf'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'sfc'
query_ngd(
  x,
  collection,
  crs = "crs84",
  start_datetime,
  end_datetime,
  cql_filter,
  filter_crs,
  max_results = 100,
  offset = 0,
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

Arguments

`x`	Object defining the query parameters, including feature IDs, extents, or spatial objects from which extents can be determined If `x` is `NULL` or missing with other options specified by name, then the first `max_results` of the collection will be returned.
`...`	Additional parameters (not currently used).
`collection`	(character) The name of the NGD Collection to query (required). See `list_ngd_collections()`.
`crs`	(character or numeric) The CRS for the returned features, either in the format "epsg:xxxx" or an EPSG number. e.g. British National Grid can be supplied as "epsg:27700" or 27700. Available CRS values are: EPSG:27700, EPSG:4326, EPSG:7405, EPSG:3857, and CRS84. Defaults to CRS84.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`returnType`	(character) Return the query results as the raw `'geojson'`, a nested `'list'` object containing the returns, or convert them into Simple Features and return an object of class `'sf'`.
`start_datetime`	(datetime or string) Selects features that have a temporal property after the given start time. If you want to query a single timestamp, provide the same value to both `start_datetime` and `end_datetime`.
`end_datetime`	(datetime or string) Selects features that have a temporal property before the given end time. If you want to query a single timestamp, provide the same value to both `start_datetime` and `end_datetime`.
`cql_filter`	(character) A filter query in CQL format. More information about supported CQL operators can be found at https://osdatahub.os.uk/docs/ofa/technicalSpecification.
`filter_crs`	(character or numeric) The CRS for a given CQL query (if required), either in the format “epsg:xxxx” or an epsg number. e.g. British National Grid can be supplied as “epsg:27700” or 27700 Available CRS values are: EPSG:27700, EPSG:4326, EPSG:7405, EPSG:3857, and CRS84. Defaults to CRS84.
`max_results`	(numeric) The maximum number of features to return. Default is 100 which is the max return per page from the Data Hub.
`offset`	(numeric) The offset number skips past the specified number of features in the collection. Used to page through results. Default is 0.

Details

The value of x determines the type of query that is executed against the NGD API. When x is missing or set to NULL the first n=max_results features are returned. If a character string of an OSID is supplied as x, then that one feature from the collection will be returned.

When x is present query_ngd() will attempt to derive an extent from it. The extent_from_* family of functions are used and can be passed to query_ngd as a more verbose option. The one exception to this, extent_from_grid_ref must be used to create an extent and query a BNG grid reference.

The start_datetime and end_datetime parameters specify a valid date-time with UTC time zone (Z). Leave either empty to specify an open start/end interval. Only features that have a temporal geometry ('versionavailablefromdate' or 'versionavailabletodate') that intersect the value in the datetime parameter are selected. Example '2021-12-12T13:20:50Z'.

More information on the structure and data in the NGD is available from: https://osngd.gitbook.io/osngd/. Technical details on the NGD API are documented on the Data Hub: https://osdatahub.os.uk/docs/ofa/technicalSpecification.

Value

A GeoJSON string with the results of the API query, a list object, or an object of class sf based on the returnType parameter.

Examples


# Return the first 50 features in the collection.
results <- query_ngd(collection = 'bld-fts-buildingline-1', max_results = 50)

# Return the most recent representation of a feature ID.
results <- query_ngd('0000013e-5fed-447d-a627-dae6fb215138',
                     collection = 'bld-fts-buildingline-1')

# Use an ONS geography to define a query extent.
results <- query_ngd(extent_from_ons_code('E05002470'),
                     collection = 'bld-fts-buildingpart-1')

# Use an BNG reference to define a query extent.
results <- query_ngd(extent_from_bng("SU3715"),
                     collection = 'bld-fts-buildingpart-1')

# Use a spatial object to define a query extent.
# Return the features converted to a spatial object.
results <- query_ngd(sf::st_read('path/to/file.shp'),
                     collection = 'bld-fts-buildingpart-1',
                     returnType = 'sf')

# Add a temporal filter to query.
results <- query_ngd(collection = 'bld-fts-buildingline-1',
                     max_results = 50,
                     start_datetime = '2021-12-12 13:20:50')

# Return the first 50 features in the collection.
results <- query_ngd(collection = 'bld-fts-buildingline-1', max_results = 50)

# Return the most recent representation of a feature ID.
results <- query_ngd('0000013e-5fed-447d-a627-dae6fb215138',
                     collection = 'bld-fts-buildingline-1')

# Use an ONS geography to define a query extent.
results <- query_ngd(extent_from_ons_code('E05002470'),
                     collection = 'bld-fts-buildingpart-1')

# Use an BNG reference to define a query extent.
results <- query_ngd(extent_from_bng("SU3715"),
                     collection = 'bld-fts-buildingpart-1')

# Use a spatial object to define a query extent.
# Return the features converted to a spatial object.
results <- query_ngd(sf::st_read('path/to/file.shp'),
                     collection = 'bld-fts-buildingpart-1',
                     returnType = 'sf')

# Add a temporal filter to query.
results <- query_ngd(collection = 'bld-fts-buildingline-1',
                     max_results = 50,
                     start_datetime = '2021-12-12 13:20:50')

Query the OS Places API

Description

Retrieve information on UK addresses within a geographic area or based on a free text search.

Usage

query_places(x, ...)

## S3 method for class 'qExtent'
query_places(
  x,
  output_crs,
  limit = 100,
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'character'
query_places(
  x,
  output_crs = "EPSG:27700",
  limit = 100,
  classification_code,
  logical_status_code,
  minmatch,
  matchprecision,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)
query_places(x, ...)

## S3 method for class 'qExtent'
query_places(
  x,
  output_crs,
  limit = 100,
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

## S3 method for class 'character'
query_places(
  x,
  output_crs = "EPSG:27700",
  limit = 100,
  classification_code,
  logical_status_code,
  minmatch,
  matchprecision,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

Arguments

`x`	Either a polygon created with `extent_from_*` functions defining the geographic area, or a character string to search.
`...`	Additional parameters (not currently used).
`output_crs`	Output CRS.
`limit`	(numeric) The maximum number of features to return. Default is 100 which is the max return per page from the Data Hub.
`classification_code`	Classification codes to filter query by.
`logical_status_code`	Logical status code to filter query by.
`dataset`	(character) The dataset to return. Multiple values can be provided as a vector. Default is 'DPA'.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`returnType`	(character) Return the query results as the raw `'geojson'`, a nested `'list'` object containing the returns, or convert them into Simple Features and return an object of class `'sf'`.
`minmatch`	The minimum matching score a result has to be returned.
`matchprecision`	The decimal point position at which the match score value is to be truncated.

Details

The OS Places API provides a detailed view of an address and its life cycle. Use this function to query Places based on a geographic area or a free text search.

Technical details on the Places API are documented on the Data Hub: https://osdatahub.os.uk/docs/places/technicalSpecification.

Note: the Places API requires a Premium API key.

Value

A GeoJSON string with the results of the API query, a list object, or an object of class sf based on the returnType parameter.

Examples


# Addresses within a bounding box
extent <- extent_from_bbox(c(600000, 310200, 600900, 310900),
                           crs = 'EPSG:27700')

results <- query_places(extent, limit = 50)

# Find addresses by text search.
results <- query_places('Ordnance Survey, Adanac Drive, SO16',
                        minmatch = 0.5)

# Addresses within a bounding box
extent <- extent_from_bbox(c(600000, 310200, 600900, 310900),
                           crs = 'EPSG:27700')

results <- query_places(extent, limit = 50)

# Find addresses by text search.
results <- query_places('Ordnance Survey, Adanac Drive, SO16',
                        minmatch = 0.5)

Query the OS Places API

Description

A query of addresses based on a property's postcode.

Usage

query_postcode_places(
  postcode,
  output_crs = "EPSG:27700",
  limit = 100,
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)
query_postcode_places(
  postcode,
  output_crs = "EPSG:27700",
  limit = 100,
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

Arguments

`postcode`	The postcode search parameter as a character.
`output_crs`	(character or numeric) The output CRS. Defaults to “EPSG:27700”.
`limit`	(numeric) The maximum number of features to return. Default is 100 which is the max return per page from the Data Hub.
`classification_code`	Classification codes to filter query by.
`logical_status_code`	Logical status code to filter query by.
`dataset`	(character) The dataset to return. Multiple values can be provided as a vector. Default is 'DPA'.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`returnType`	(character) Return the query results as the raw `'geojson'`, a nested `'list'` object containing the returns, or convert them into Simple Features and return an object of class `'sf'`.
`...`	Additional parameters (not currently used).

Details

The OS Places API provides a detailed view of an address and its life cycle. Use this function to query Places based on a postcode search. The minimum search parameter for this resource is the postcode area and postcode district. For example, 'SO16' is a valid search. Full postcodes, consisting of area, district, sector and unit, e.g. SO16 0AS can also be supplied.

Technical details on the Places API are documented on the Data Hub: https://osdatahub.os.uk/docs/places/technicalSpecification.

Note: the Places API requires a Premium API key.

Value

A GeoJSON string with the results of the API query, a list object, or an object of class sf based on the returnType parameter.

Examples


results <- query_postcode_places(postcode = 'SO16 0AS')

results <- query_postcode_places(postcode = 'SO16 0AS')

Query the OS Places API

Description

A query of addresses based on a property's UPRN.

Usage

query_uprn_places(
  uprn,
  output_crs = "EPSG:27700",
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)
query_uprn_places(
  uprn,
  output_crs = "EPSG:27700",
  classification_code,
  logical_status_code,
  dataset = "DPA",
  key = get_os_key(),
  returnType = c("geojson", "list", "sf"),
  ...
)

Arguments

`uprn`	A valid UPRN.
`output_crs`	(character or numeric) The output CRS. Defaults to “EPSG:27700”.
`classification_code`	Classification codes to filter query by.
`logical_status_code`	Logical status code to filter query by.
`dataset`	(character) The dataset to return. Multiple values can be provided as a vector. Default is 'DPA'.
`key`	(character) OS API key. Default action is to search for an environment variable using `get_os_key()`.
`returnType`	(character) Return the query results as the raw `'geojson'`, a nested `'list'` object containing the returns, or convert them into Simple Features and return an object of class `'sf'`.
`...`	Additional parameters (not currently used).

Details

The OS Places API provides a detailed view of an address and its life cycle. Use this function to query Places based on a UPRN search.

Technical details on the Places API are documented on the Data Hub: https://osdatahub.os.uk/docs/places/technicalSpecification.

Note: the Places API requires a Premium API key.

Value

A GeoJSON string with the results of the API query, a list object, or an object of class sf based on the returnType parameter.

Examples


results <- query_uprn_places(uprn = 200010019924)

results <- query_uprn_places(uprn = 200010019924)

Set credentials for OS Data Hub

Description

In order to use the Ordnance Survey Data Hub a valid API key is required.

Usage

set_os_key(apikey)

get_os_key()

has_os_key()
set_os_key(apikey)

get_os_key()

has_os_key()

Arguments

apikey

(character) Required project API key.

Details

Stores the user provided character string in an environment variable named OS_API_KEY. No validation of the key is applied when storing. To obtain a key go to https://osdatahub.os.uk/.

Be careful not to reveal secrets including API keys. This function may print the API key to the console. It is used internally by the osdatahub query functions.

Primarily this is used internally to control when examples are executed.

Value

(Invisibly) A logical value from Sys.setenv whether an environment variable was set.

If an environment variable named OS_API_KEY is present, the character string for the variable is returned.

If an environment variable named OS_API_KEY is present, then TRUE, else this function returns FALSE.

Examples

set_os_key('my-api-key')


my_api_key <- get_os_key()

has_os_key()

set_os_key('my-api-key')


my_api_key <- get_os_key()

has_os_key()

Package 'osdatahub'

Help Index

Return the geometry of a British National Grid square

Description

Usage

Arguments

Details

Value

See Also

Examples

Download OS premium data packages

Description

Usage

Arguments

Details

Value

See Also

Examples

Download OS OpenData Products

Description

Usage

Arguments

Details

Value

See Also

Examples

Create extents from geometries

Description

Usage

Arguments

Details

Value

Examples

Retrieve an extent for ONS geographies

Description

Usage

Arguments

Details

Value

See Also

Examples

Retrieve ONS geographies

Description

Usage

Arguments

Details

Value

Examples

Print the currently accepted EPSG codes.

Description

Usage

Arguments

Value

Examples

Retrieve OS NGD Feature Collections

Description

Usage

Arguments

Details

Value

Examples

Retrieve information on premium OS data packages

Description

Usage

Arguments

Details

Value

See Also

Examples

Retrieve information on OS OpenData Downloads

Description

Usage

Arguments

Details

Value

See Also

Examples

Query the OS Maps API

Description

Usage