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Message from USGS regarding SDTS DEMs

(Oct 14, 2001) -- New FGDC-Compliant USGS SDTS 7.5' DEMs available on-line. A Non-compliant profile identifier was used in the USGS SDTS DEMs that were released to the public at the GeoCommunity GIS Data Depot in July 2001. The compliant USGS SDTS DEMs are now available from the GIS Data Depot ( Non-compliant data have been purged and are no longer being distributed. The issue of non-compliance was with the profile identifier name only and did not affect the integrity of the data.

You will also notice a change in the naming convention regarding the FGDC-compliant dataset and the tar file. For example, the Dixon, Missouri quad's .tar file name is 1626663 (preceded by GeoComm's unique download instance identifier) and the .ddf names are 7364. This change is the result of USGS maintenance requirements and does not affect the data. For more information, please see this notice: New FGDC-Compliant SDTS 7.5' DEMs available at GeoCommunity site (

Please note that the GIS Data Depot is not responsible for the non-compliant identifier name. The USGS is the maintenance authority for SDTS and continues to be the technical contact for the data and is responsible for policy regarding data distribution. Please email us at for more information.

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