Buffer (GIS)

A buffer in GIS is a zone around a map feature measured in units of distance or time. A buffer is useful for proximity analysis.[1]

A buffer is an area defined by the bounding region determined by a set of points at a specified maximum distance from all nodes along segments of an object.

See also

Dilation (morphology) (positive buffer)
Erosion (morphology) (negative buffer)

GIS

External links

OGC ST_Buffer function (PostGIS implementation)

References

Wade, T. and Smmer, S. eds. A to Z GIS

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