Long Valley Caldera Digital Raster Graphics
FGDC Metadata
1:100,000 Scale - 1:24,000 Scale
Introduction
The USGS Digital Raster Graphics for the Long Valley Caldera region for this report were obtained from the California Spatial Information Library (CaSIL) in Albers projection. Each DRG is available in TIFF format with a corresponding world file to georeference the image.
1:100,000 Scale
Four USGS 1:100,000 scale DRGs (Yosemite Valley, Benton
Range, Bridgeport, and Excelsior Mts.) were mosaiced. Then the
mosaiced DRG was clipped to the study area to create the Long Valley
1:100,000 scale DRG.
1:24,000 Scale
Each 1:24,000 scale DRG from the State of California was
in Albers projection. To match the other data from the Long Valley
Observatory GIS Database, the DRGs were converted to Grid format,
reprojected into UTM, Zone 11 , and finally converted back to TIFF
images using ArcInfo. The following topographic quadrangles are
provided in this report:
| Bloody Mountain | Dexter Canyon | Mammoth Mountain | Sulphur Pond |
| Convict Lake | Glass Mountain | Mono Mills | Tom's Place |
| Crestview | June Lake | Negit Island | Whitmore Hot Springs |
| Crystal Crag | Lee Vining | Old Mammoth | Waterson
Canyon |
The data are provided in georeferenced TIFF image format that can be used in a number of GIS and visualization software packages. The TIFF 6.0 standard is copyrighted by Adobe System Incorporated.
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TIFF Image format
| Data
directory |
TopographicData/DRG |
| Map
projection |
UTM |
| Zone |
11 |
| Datum |
NAD27 |
| Units |
Meters |
The data are available in TIFF image format and can be used in a number of GIS and visualization software
packages. The data include the following
directories and files:
| .. |
README.txt |
| 24K_DRG |
image (.tif)
and world file (.tfw) for the following USGS
topographic quadrangles |
| Bloody Mountain | Dexter Canyon | Mammoth Mountain | Sulphur Pond |
| Convict Lake | Glass Mountain | Mono Mills | Tom's Place |
| Crestview | June Lake | Negit Island | Whitmore Hot Springs |
| Crystal Crag | Lee Vining | Old Mammoth | Waterson
Canyon |
| 100K_DRG |
drg_100k_utm image (.tif) and world file (.tfw) |
1. Go to the TopographicData/DRG folder to download the data
