GIS Dictionary

The study of the geographical distribution of living things.

The total amount of organic matter in a defined area; usually refers to vegetation.

[computing] The smallest unit of information within a computer. A bit can have one of two values, 1 and 0,

[data structures] The range of values that a particular raster format can store, based on the formula 2n. An 8-bit

An image format in which one or more bits represent each pixel on the screen. The number of bits per

[data capture] A method of manual digitizing in which the operator has no graphic display on hand with which to

1 [database structures] Acronym for binary large object. A large block of data, such as an image, a sound file,

[ESRI software] In ArcGIS, a group of records in a compressed file geodatabase feature class or table that are stored

[non-ESRI software] In CAD, a collection of objects that can be associated to form a single object.

[federal government] A unit of U.S. census geography that is a combination of census blocks. A block group is the

A kriging method in which the average expected value in an area around an unsampled point is generated rather than