GIS Dictionary

[statistics] Ordinal, interval, or ratio data represented as a surface in which the height of each area is proportional to […]

[network analysis] A line that follows the steepest downhill direction on a surface. Paths terminate at the surface perimeter or

[Euclidean geometry] The solid (conical) angle subtended at the center of a sphere of radius r by a bounded region

[map design] A map produced with a stereoscopic plotter using aerial photographs and geodetic control data.

1 [map projections] A tangent planar projection that views the earth’s surface from a point on the globe opposite the

[photogrammetry] A stereoscope containing a micrometer for measuring the effects of parallax in a stereoscopic image.

[photogrammetry] The three-dimensional image formed where rays from points in the images of a stereoscopic pair intersect.

[photogrammetry] Two aerial photographs of the same area taken from slightly different angles that when viewed together through a stereoscope

[photogrammetry] An instrument that projects a stereoscopic image from aerial photographs, converts the locations of objects and landforms on the

[photogrammetry] A binocular device that produces the impression of a three-dimensional image from two overlapping images of the same area.

[ESRI software] When editing in ArcMap, a setting that defines the minimum number of pixels the pointer must move on