Affected Area
The “buffer” operation allows to remotely calculate polygons generated from a user specified geometry, applying certain affected areas around, also specified by the user.
The following figure shows the creation of polygon (defined permiter by a continous blue line) from some initial polygons.
Request example:
and related response:
{"geometries":[{"rings":[[[418050,4584838.3338928223],[418248.78257548466,4584834.3808789589],[418447.25083485857,4584822.5280878954],[418645.09095900954,4584802.7942613317],[418841.99012203608,4584775.2106025042],[419037.63698588975,4584739.8207268454],[419231.72219266451,4584696.680593024],[419423.93885375513,4584645.858414459],[419613.98303511116,4584587.4345514616],[419801.5542378191,4584521.5013841661],[419986.3558732532,4584448.1631664634],[420168.09573204262,4584367.5358611494],....,[418050,4589838.3338928223]]]}]}
Paràmetres del servei
Parameter | Description |
|---|---|
f | Response format Valid values: html | json |
The array of geometries of which the affected areas are wanted to be generated. The syntax of this parameter should be: | |
Reference system identifier used to describe the geometries from which the affected area should be calculated. | |
Reference system identifier used to describe the geometries resulting from the operation. If not specified, the one indicated as inSR is taken by default. | |
Reference system identifier used to describe the affected area. If not specified, the one indicated as inSR is taken by default. | |
distances | Magnitude of the distances to which the areas affected by the geometry are wanted to be calculated. If more than one are indicated, the corresponding polygons for each of them will be created. The syntax of this parameter should be: distances= |
Unit in which the distances are expressed. If not specified, the associated value of the reference system indicated as the bufferSR is taken by default. See the list of possible values | |
unionResults | If equal to “true”, all geometries calculated using the same distance are joint on a single one. Valid values: : true | false Default value: false |
geodesic | If coordinates are expressed in a geograhic corodinate system, this parameter has to be 'true' in order to generate the affected areas using geodesic distances and non projected. The parameter “bufferSR” will be ignored when euql to “true”. Valid values: true | false Default value: false |
token | Required security key in order to perform this function which is generated by filling in the corresponding form form. |