Essential Defense Mapping vocabulary

Available with Defense Mapping license.

The following are common terms that are encountered when using Defense Mapping.

Extraction guide

A document that provides extraction guidance for all the features in a data specification. The instructions provided in the guide can include information about the dimensions for features for a specific feature class as well as their attributes. The purpose of the extraction guide is to provide a logical approach to feature extraction that results in consistent data collection.


Acronym for Geospatial Analysis Integrity Tool.


A shapefile is a vector data storage format for storing the location, shape, and attributes of geographic features. A shapefile is stored in a set of related files and contains one feature class.


Acronym for Technical Reference Document. The Multinational Geospatial Co-production Program (MGCP) Technical reference document includes documentation for the MGCP Data Model, MGCP Data Extraction, and MGCP Quality.


A vertex is one of a set of ordered x,y coordinate pairs that defines the shape of a line or polygon feature.


The value for a given surface location that represents an attribute other than position. In an elevation or terrain model, the z-value represents elevation; in other surface models, it represents the density or quantity of a particular attribute.