THE MARYLAND-NATIONAL CAPITAL PARK AND PLANNING COMMISSION
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Glossary of Planning and Geographic Information Systems (GIS) Terms Glossary of Planning and Geographic Information Systems (GIS) Terms

Glossary is usually defined as an alphabetical list of technical terms in some specialized field of knowledge. This knowledge base glossary provides a collection of knowledge base documents that define many technical terms. These terms are arranged alphabetically, but you can quickly jump to a specific term by selecting its first letter from the index of the knowledge base glossary below.

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High-Occupancy Vehicle (Hov)
A passenger vehicle containing more than one person. HOV facilities - such as John Hanson Highway (US 50) in Prince George's County - generally require a minimum number of occupants for a vehicle to be granted access to HOV lanes.
Historic District
A group of historic resources comprised of two or more properties that are significant as a cohesive unit and contribute to the historical, architectural, archeological, or cultural values within the Maryland-Washington Regional District and that has been so classified in the county's Historic Sites and Districts Plan.
Historic Resource
An area of land, building, structure or object that may be significant in American history, architecture, archaeology, or culture. Historic resources, designated as such in the county's Historic Sites and Districts Plan are considered unclassified and are not protected by the Prince George's County Historic Preservation Ordinance.
Historic Site
An individual historic resource that is significant in American history, architecture, archaeology, or culture and is so designated on the county's Historic Sites and Districts Plan. A historic site is protected by the Prince George's County Historic Preservation Ordinance.
Holding Capacity
The estimate of the maximum housing and employment development permitted by an area's zoning.