• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Curb: The edge of roads, alleys, ramps or parking lots, other than those for which polygons can be formed. Curbs are rims, usually made of concrete, along a roadway, forming an edge for a...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Obscured Areas are areas in the compilation imagery that due to shadows, dense vegetation, heavy tree cover, building lean, etc., that completely block out all image detail and nothing can be seen...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Bridges: All bridges are digitized as polygons. Bridges carry roads or railroads over water. Outside edges of all bridges delineated. Also bridge deck locations or clear spans where deck is not...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Traffic Barrier. The dataset contains polylines representing planimetric traffic barriers, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

The perimeter of public and private swimming pools are captured, for both above-ground and in-ground pools. No other features can make a side for this feature. Pools do not overlap any other...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

All public walkways are captured. Sidewalks do not overlap other feature classes unless they are hidden under a bridge or overpass. Cement pads around public swimming pools are captured. Walkways...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Building structures include parking garages, ruins, monuments, and buildings under construction along with residential, commercial, industrial, apartment, townhouses, duplexes, etc. Buildings...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Grate: A single point capture for the feature at the visual center point. Grates are structures of parallel or crossed bars, used to cover steam vents or other ventilation features for buildings,...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Taxiway, Apron: Delineate footprint of the following features. A taxiway connects aircraft to other areas and facilities of an airport. The apron is an area of an airport where aircraft are...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Water is a polygon feature class consisting of the following features and capture rules: Lakes, Reservoirs: Delineates the shoreline of all standing bodies of water designated as a lake or...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Centerlines of railroads or Metrorail are captured. The line is at the midpoint between each rail line. Hidden features due to tunnels, overpasses, or bridges are interpolated for connectivity....

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Road edges are defined as the edge of the improved surface including the improved shoulder but do not include the unimproved shoulder, only the travel part of the road. The road network is...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

Control points are captured by land surveyors to create control for orthophotography. These points are captured with survey-grade equipment ensuring the highest accuracy in their location....

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

This layer contains hydrography such as streams, rivers, and other linear hydrography features. Hidden hydrography, inferred drainage connectors, or culverts connect visible hydrography to form a...

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• Organization: District of Columbia
• Updated: 2024-03-22T00:00:00.000Z

The perimeter of all public and private sport/recreation courts, including clay, grass, dirt, and paved surfaces are captured. Each court is delineated separately even if adjacent. Pavement...

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