dcgis: DC GIS Glossary 1b

DC GIS Glossary

For more information or for terms not defined here, please visit the ESRI GIS Dictionary

Term	Definition
Health	Health services, human ecology, and safety. For example, resources describing human disease and illness, factors affecting health, hygiene, mental and physical health, substance abuse, and health services.
Historic	Significant features from the past. For example, resources describing landmarks, historical plans, settlements, and heritage.
Image	Common examples of images used in GIS include remotely sensed data (for example, statellite data), scanned data, and photographs.
LIDAR	Laser Imaging Detection and Ranging, an optical remote sensing technology which measures properties of scattered light to find range and/or other information of a distant target. The prevalent method to determine distance to an object or surface is to use laser pulses. Like the similar radar technology, which uses radio waves instead of light, the range to an object is determined by measuring the time delay between transmission of a pulse and detection of the reflected signal.
Location	Positional information and services. For example, resources describing addresses, geodetic networks, postal zones and services, control points, and place names.
MAR	Master Address Repository. See the MAR Page.
Metadata	Information that describes the content, quality, condition, origin, and other characteristics of data or other pieces of information. The DC Federated Data Model provides the District government standards for metadata.
Mobile Video	The product name of van-captured photographic elevations for buildings in the District of Columbia. The primary purpose of the project was for taxation and it was used in the creation of the MAR.
National	Data from all categories that cover the entire continental United States of America.
Neighborhood Clusters	There are 39 Neighborhood Clusters currently used for community planning and related purposes in the District of Columbia.
OCTO GIS	Refers to the central GIS staff, and not the DC GIS system.
Originator	The acronym for the agency that is the original source of the data. The source for nearly all map layers created by OCTO that are not part of the planimetric map is another District Agency.

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