buffer

buffer(geom, dist::Real, quadsegs::Integer=30; gdataset=false)

Compute buffer of a geometry.

Parameters

• geom: the geometry. This can either be a GDAL AbstractGeometry or a GMTdataset (or vector of it), or a Matrix
• dist: the buffer distance to be applied. Should be expressed into the same unit as the coordinates of the geometry.
• quadsegs: the number of segments used to approximate a 90 degree (quadrant) of curvature.

Keywords

• gdataset: Returns a GDAL IGeometry even when input is a GMTdataset or Matrix

Builds a new geometry containing the buffer region around the geometry on which it is invoked. The buffer is a polygon containing the region within the buffer distance of the original geometry.

Some buffer sections are properly described as curves, but are converted to approximate polygons. The quadsegs parameter can be used to control how many segments should be used to define a 90 degree curve - a quadrant of a circle. A value of 30 is a reasonable default. Large values result in large numbers of vertices in the resulting buffer geometry while small numbers reduce the accuracy of the result.

Returns

A GMT dataset when input is a Matrix or a GMT type (except if gdaset=true), or a GDAL IGeometry otherwise