RevPG (Revision and Product Generation) is a collection of ARC/INFO Arc Macro Language (AML) programs, C routines, shell scripts, and interface menus. This software was developed by the U.S. Geological Survey (USGS) to support the revision of Digital Line Graph (DLG) data. Under a Cooperative Research and Development Agreement (CRADA) with Environmental Systems Research Institute (ESRI), Inc., it has been ported to a number of Unix environments. Recent USGS efforts have ported RevPG to Windows_NT and maintained Unix platform support.
At USGS, DLG revision is performed using a Digital Orthophoto Quadrangle (DOQ) which is a high-altitude aerial photograph that has been scanned and geographically corrected. RevPG also provides display symbology and other support for the production of printed maps from DLG's corresponding to standard USGS topographic quadrangle specifications.
RevPG is now available for download to use with Windows NT and a number of Unix workstation environments. See the text files README in the ftp directory and the release notes for more information on RevPG, system and disk requirements, and how to retrieve and install it at your site.
Inquiries regarding RevPG may be directed to:
U. S. Geological Survey
Mid Continent Mapping Center
Att: RevPG System Manager, MS 821
1400 Independence Rd.
Rolla, MO 65401 USA
Fax: (573) 308-3652
Although these programs have been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy and functioning of the programs and related program material, nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection herewith.
The use of trade names does not imply an endorsement by the U.S. Government.