ARC Digitized Raster Graphics

GISWiki - Das freie Portal für Geoinformatik (GIS)
Version vom 10. März 2006, 23:47 Uhr von HeinzJ (Diskussion | Beiträge)

(Unterschied) ← Nächstältere Version | Aktuelle Version ansehen (Unterschied) | Nächstjüngere Version → (Unterschied)
Wechseln zu: Navigation, Suche
ARC Digitized Raster Graphics
Bezeichnung: ADRG
Erweiterung: .
Struktur: Raster
Format: binär
Topologie: nein
Sachdaten: nein
Standard: nein
Organisation: U.S. Defense Mapping Agency



Deutsch

Das ADRG-Format dient dem Austausch von georeferenzierten Rasterdaten mit den Einsatzgebieten Kartenvisualisierung für Kommando- und Kontrollsysteme, Einsatzplanungssysteme und Flugzeugnavigationsunterstützung. Bedeutung hat das Format weltweit, vor allem im militärischer Bereich.

Das Datenformat ist nicht mehr in Gebrauch.

English

The ADRG-format comprises data originally produced by the National Imagery and Mapping Agency (NIMA) in the United States. These data are derived from one or more paper graphic products transformed into digital data by raster scanning at a nominal resolution of 100 microns (254 lpi) and in 24-bit RGB color. These products are transformed according to the Equal Arc-Second Raster Chart/Map (ARC) system frame of reference. The ARC system divides each hemisphere into nine zones of ten degrees of latitude to minimize distortion. The ADRG uses a rectangular coordinate projection based on the datum of the World Geodetic System 1984 (WGS84).

The primary sources are conventional map sheets dated from 1984 to 1991, based on the National Topographic System (NTS). The geographic data sets generated by scanning these maps are then presented as distribution rectangles. Each distribution rectangle may contain one or more data sets. The group of distribution rectangles in a series at a specific scale is the equivalent of a seamless world database of geospatial raster data in which each pixel has a distinct geographic location (georeferenced data).

The main purpose of these data is to serve as a raster display background for different applications.

Weblinks