MrSid Mosaic of Quarter Million Scale Digital Raster Graphics (DRG)- DENA
GIS Team National Park Service, Alaska Regional Office. 1998. MrSid Mosaic of Quarter Million Scale Digital Raster Graphics (DRG)- DENA. National Park Service, Alaska Regional office
Raster image of scanned USGS topological maps at 1:250,000 scale. DRG's retain most of the geometric and visual qualities of the source maps. The DRGs have been clipped by NPS to remove all text and annotations contained on the topographic sheets that are outside the map quadrangle boundary. NPS has also projected these products to Alaska Albers.The moasic was created using LizardTech MrSid software at a 20:1 compression ratio.
- Type
- Geospatial Dataset
- Authors
- GIS Team National Park Service, Alaska Regional Office
- Date of Issue
- 1998-01-01
- Publisher
- National Park Service, Alaska Regional office
- Units
- DENA
- Keywords
- Alaska, DENA, Denali National Park And Preserve, Digital Raster Graphic, DRG, image mosaic