dcgis: DC GIS Glossary 2

DC GIS Glossary

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

Term	Definition
Owner Point	A map point over a single lot, attributed with information about the owner.
Owner Polygon	A single polygon feature class that represents land with taxable information about the owner, taxes, land use, etc.
Parcel Lot	Land often not residing within a square, most of which were created in 1905 by Act of Congress. All the unsubdivided land from Washington County merged with the city of Washington to form the District of Columbia.
Pictometry	Shows high resolution images taken at oblique angles of about 45 degrees from the four compass points and from directly above.
Planimetric Map	Contains point and line map layers of visible features from aerial photography, such as streets, sidewalks, alleys, buildings, open space, utilities, etc.
Planning, Land Use, and Zoning	For example, resources describing zoning maps, and information used for planning the environment.
Property and Land	For example, resources describing cadastral surveys and land ownership.
Public Safety	Resources related to emergency services. For example, Fire, EMS, and Police.
Public Services	Resources related to social and governmental services provided to the public.
Record Lot	Defined by the DC Surveyor. These are official, platted, recorded subdivision lots created by the D.C. Surveyor's Office in compliance with the Subdivision Ordinance of the District of Columbia. These typically must have public street frontage.
Recreation	Resources related to outdoor activities. For example, parks, sports complexes, pools, and playing fields.
Reservations	Lands acquired for use by the Federal Government after the original founding of the city. There are presently more than 750 U.S. Reservations in D.C. These were acquired by the Federal Government through purchase, condemnation, dedication or gift. The majority of U.S. Reservations in Washington are under the jurisdiction of the National Park Service.
Square	A unit of land defined by the DC Surveyor that normally consists of a single city block and contains record and tax lots.
SSD	Street Spatial Database, the DDOT central GIS data repository for all transportation related assets and data.

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