11-area-agg-space-time.md

Retrieve a time series for selected variables for each station in an area and apply functions on all values

This DAPA endpoint returns observation values for an area (parameter bbox, coord or coordRef) in the selected time interval or at the selected time instant (parameter datetime).

All values for each requested variable (parameter variables) are aggregated and each of the requested statistical functions (parameter functions) is applied to the aggregated values.

Sample request

Retrieve all observations in the state North-Rhine Westphalia in Germany for August 2019 and apply the functions min(), max(), mean(), count() and std-dev().

http://t16.ldproxy.net/ghcnd/collections/observation/dapa/area:aggregate-space-time?
coordRef=https%3A%2F%2Fwww.ldproxy.nrw.de%2Fdvg%2Fcollections%2Fnw_dvg2_bld%2Fitems%2Fnw_dvg2_bld.05000000&
datetime=2019-08-01/2019-08-31&
variables=TMAX,TMIN,PRCP&
function=min,max,mean,count,std-dev

Request GeoJSON

Request CSV

Sample responses

CSV

PRCP_count,PRCP_max,PRCP_mean,PRCP_min,PRCP_std-dev,TMAX_count,TMAX_max,TMAX_mean,TMAX_min,TMAX_std-dev,TMIN_count,TMIN_max,TMIN_mean,TMIN_min,TMIN_std-dev
1333,443.0,18.745686,0.0,42.16499,1178,350.0,251.22072,139.0,39.133766,1178,218.0,128.9236,46.0,29.123257

Sample response in GeoJSON

The geometry has been shortened.

{
  "type" : "FeatureCollection",
  "features" : [ {
    "type" : "Feature",
    "geometry" : {
      "type" : "Polygon",
      "coordinates" : [ [ [ 6.094259257869, 51.616130588555 ], [ 6.093923825039, 51.622147469348 ], ... ] ]
    },
    "properties" : {
      "phenomenonTime" : "2019-08-01/2019-08-31",
      "TMIN_count" : 1178,
      "TMAX_count" : 1178,
      "PRCP_mean" : 18.745686,
      "TMAX_max" : 350.0,
      "PRCP_min" : 0.0,
      "TMAX_min" : 139.0,
      "PRCP_max" : 443.0,
      "TMAX_std-dev" : 39.133766,
      "TMIN_mean" : 128.9236,
      "PRCP_count" : 1333,
      "TMIN_min" : 46.0,
      "PRCP_std-dev" : 42.16499,
      "TMAX_mean" : 251.22072,
      "TMIN_std-dev" : 29.123257,
      "TMIN_max" : 218.0
    }
  } ]
}

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