GIS Dictionary

1 A line along which measurements are made in order to determine the coordinates of a location. 2 [coordinate systems] […]

1 The horizontal angle, measured in degrees, between a baseline drawn from a center point and another line drawn from

[map projections] A map projection that transforms points from a spheroid or sphere onto a tangent or secant plane. The

A tree data structure used for indexing data within a database or file system implementation. In a B-tree structure, data

[output] In ArcScene or ArcGlobe, the backdrop of the view. The color of the background can be set to suggest

[remote sensing] Electromagnetic energy that is reflected back toward its source by terrain or particles in the atmosphere.

[cartography] Acronym for best available map. The most suitable data source for a map.

[remote sensing] A set of adjacent wavelengths or frequencies with a common characteristic. For example, visible light is one band

[digital image processing] A digital image-processing technique that enhances contrast between features by dividing a measure of reflectance for the

[remote sensing] An image format that stores each band of data in a separate file.

[remote sensing] A wave filter that allows signals in a certain frequency to pass through, while blocking or attenuating signals