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USGS - science for a changing world

Dates

Original Data Basin Creation Date
2011-04-07 07:03:07
Original Data Basin Modified Date
2011-05-12 18:26:44

Summary

The Digital Chart of the World (DCW) is an Environmental Systems Research Institute, Inc. (ESRI) product originally developed for the US Defense Mapping Agency (DMA) using DMA data. The DCW 1993 version at 1:1,000,000 scale was used. The DMA data sources are aeronautical charts, which emphasize landmarks important from flying altitudes. This explains why there is a separate aeronautical theme with all conceivable airports, yet why on some themes small islands and lakes are simply unnamed points. ESRI, in compiling the DCW, also eliminated some detail and made some assumptions for handling tiny polygons and edgematching. Also, note that the completeness of the thematic categories present in each layer will vary. Please read the layer [...]

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  • Data Basin

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Provenance

Data source
Environmental Systems Research Institute, Inc.
Harvested on Fri May 23 09:39:15 MDT 2014 from Data Basin Service

Additional Information

Identifiers

Type Scheme Key
UniqueKey Data Basin df9d4fc16ea1446c82e8fd139d4d8a12

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