Illinois & Michigan Canal National Heritage Corridor DRGs - MrSID format (ILMIDRG.SID)
Budde P. 2002. Illinois & Michigan Canal National Heritage Corridor DRGs - MrSID format (ILMIDRG.SID). National Park Service Midwest Region GIS Technical Support Center
ilmidrg.sid contains 37 compressed and appended USGS DRGs for the area in and around Illinois & Michigan Canal National Heritage Corridor. The compression ratio applied in the MrSID software was 10:1 and the 'no data' output values are 128, 128, 128 (gray). The mosaic is projected to UTM Zone 16, nad83.
- Type
- Geospatial Dataset
- Authors
- Budde, Peter
- Date of Issue
- 2002-08-02
- Publisher
- National Park Service Midwest Region GIS Technical Support Center
- Units
- ILMI
- Keywords
- 7.5' Quadrangle, DRG, Illinois, Illinois & Michigan Canal NHC, MrSID, Topographic Map