GNS Placename Datasets - Processing Details
The Geographic Names Database is a public domain dataset produced and published by the United States Board on Geographic Names. According to the official publication information: "Toponymic information is based on the Geographic Names Data Base, containing official standard names approved by the United States Board on Geographic Names and maintained by the National Geospatial-Intelligence Agency. More information is available at the Maps and Geodata link at www.nga.mil."
"GNS Country Files, China." Geographic Names Database (c) 2000 U.S. Board on Geographic Names Public Domain Dataset
CHGIS Processing of GNS files
CHGIS used the 1990 CITAS polygons to spatially join administrative jurisdiction data to the GNS point features. We also clipped out many of the FIELDS from the original GNS files that contained NULL values. The result are thirty separate GIS layers, one for each province (circa 1990). All of the features found in the Provincial GIS layer have been stamped with their parent jurisdictions at the County and the Prefecture levels. The jurisdiction information includes Placenames and National Standard Geographic Codes (see GuoBiao Table 2260 1991 for more information on GB Codes).
For example, the feature called Yiwu, which has no jurisdictional information in the original GNS file, contains the following information in the CHGIS GNS China 1990 Placenames in Yunnan layer: