GEO.BUFFER
geoConfiguration parameters
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warpscript.maxgeocells.hard
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warpscript.maxgeocells
The GEO.BUFFER function allows to create buffer GEOSHAPE objects. The function takes a MAP instance as input. This map can contain the following entries:
| Key | Description |
|---|---|
dist | Distance of the buffer, as a central angle expressed in degrees. |
mdist | Distance of the buffer expressed in meters. This key is only taken into account if dist is not specified. |
cap | The end cap style to consider, use SQUARE, FLAT or ROUND (default). |
join | The join style to use, use BEVEL, MITRE or ROUND (default). |
limit | The mitre limit to use. Defaults to 5.0. |
segments | Number of segments to use per quadrant, defaults to 8. |
singlesided | Set to true to compute a single sided buffer. If true, positive distance will indicate left-hand side and negative distance right-hand side. End cap is ignored for single sided buffers. |
wkb | Byte array containing a WKB definition of a geographic area. |
wkt | String containing a WKT definition of a geographic area. |
geojson | String containing a GeoJSON definition of a geographic area. |
If a geographic area is defined, only one of wkb, wkt or geojson may be specified. The output of the function is a new definition of a geographic area with the buffer added to the original definition.
If no geographic area is defined, GEO.BUFFER will define a buffer which will be used by the next call to either GEO.WKT, GEO.WKB or GEO.JSON.