ohsome_contributions_count: Count OSM contributions

Description

Creates an ohsome_query object for OSM contributions count

Usage

ohsome_contributions_count(
  boundary = NULL,
  latest = FALSE,
  return_value = c("absolute", "density"),
  time = NULL,
  ...
)

Value

An ohsome_query object. The object can be sent to the ohsome API with ohsome_post(). It consists of the following elements:

url: The URL of the endpoint.
encode: The way the information is encoded and then posted to the ohsome API. Set as "form".
body: The parameters of the query such as format, filter or bpolys.

Arguments

boundary

Bounding geometries specified by WGS84 coordinates in the order lon,lat. The geometries of sf are transformed to WGS84 if the CRS of the object is known. The following classes are supported:

sf with (MULTI)POLYGON geometries
sfc with (MULTI)POLYGON geometries
sfg with (MULTI)POLYGON geometries and WGS 84 coordinates
bbox created with sf::st_bbox() or tmaptools::bb()
matrix created with sp::bbox() or osmdata::getbb()
character providing textual definitions of bounding polygons, boxes or circles as allowed by the ohsome API (see ohsome API - Boundaries ):
- bboxes: WGS84 coordinates in the following format: "id1:lon1,lat1,lon2,lat2|id2:lon1,lat1,lon2,lat2|..." OR "lon1,lat1,lon2,lat2|lon1,lat1,lon2,lat2|..."
- bcircles: WGS84 coordinates + radius in meter in the following format: "id1:lon,lat,r|id2:lon,lat,r|..." OR "lon,lat,r|lon,lat,r|..."
- bpolys: WGS84 coordinates given as a list of coordinate pairs (as for bboxes) or GeoJSON FeatureCollection. The first point has to be the same as the last point and MultiPolygons are only supported in GeoJSON.
list of bbox, matrix or character. Bounding geometry types of all list elements must be the same. Does not work with GeoJSON FeatureCollections.

latest

logical; if TRUE, request only the latest contributions provided to each OSM element.

return_value

character; the value to be returned by the ohsome API:

"absolute" returns the absolute number of contributions. This is the default.
"density" returns the number of contributions per square kilometer.

time

character; time parameter of the query (see Supported time formats).

...

Parameters of the request to the ohsome API endpoint.

Details

ohsome_contributions_count() creates an ohsome_query object for OSM element aggregation. Boundary objects are passed via set_boundary() into ohsome_boundary().

Examples

Run this code

# Monthly counts of contributions to man-made objects around "Null Island"
ohsome_contributions_count("0,0,10", filter = "man_made=*", time = "2010/2020/P1Y")

# Monthly counts of latest contributions to man-made objects around "Null Island"
ohsome_contributions_count(
    "0,0,10", 
    latest = TRUE, 
    filter = "man_made=*", 
    time = "2010/2020/P1Y"
)