GIS Dictionary

[ESRI software] In Survey Analyst, a unique part of every survey project. Points have a common name space across all […]

[graphics map display] A unit of measure for fonts, nearly equal to 1/72 of an inch.

[3D GIS] Act of reducing point data in a dataset. Point thinning reduces the number of point measurements needed to

[spatial analysis] A spatial operation in which points from one feature dataset are overlaid on the polygons of another to

[map projections] A planar projection with its central point located at either the north or south pole.

A satellite orbit with an inclination near 90 degrees that passes over each polar region.

[geodesy] The distance from the earth’s geometric center to either pole.

1 [data models] On a map, a closed shape defined by a connected sequence of x,y coordinate pairs, where the

1 [data models] A map feature that bounds an area at a given scale, such as a country on a

[data editing] The process of superimposing two or more geographic polygon layers and their attributes to produce a new polygon

[data models] In a polygon coverage, the list of topologically connected arcs that define the boundary of a polygon feature