USGS Geoscience Data Catalog
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Godt, Jonathan, and Coe, Jeffrey, 2003, Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow initiation points: U.S. Geological Survey Open-File Report 03-50, U.S. Geological Survey, Denver, Colorado.This is part of the following larger work.Online Links:
Godt, Jonathan W. , and Coe, Jeffrey A. , 2003, Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: U.S. Geological Survey Open-File Report 03-50.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000032
Ordinates (y-coordinates) are specified to the nearest 0.000032
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.400000.
The flattening of the ellipsoid used is 1/294.978698.
Value | Definition |
---|---|
ss | soil slip |
non-ss | not soil slip |
303-273-8626 (voice)
303-273-8600 (FAX)
jgodt@usgs.gov
The purpose of these data is provide an inventory the debris flows that were triggered over a 2-square kilometer area in the central Front Range of Colorado by a July 28, 1999 thunderstorm. These data do not consitute a debris-flow hazard map of the area.
The scale of the aerial photography allowed us to accurately identify debris-flow features as small as about 0.5 m. At 1: 24,000 scale, debris-flow features less than about 5 m wide (~ 0.2 mm at 1:24,000) are not visible.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- This map is an inventory map, not hazard map, and should not be enlarged to a scale larger than 1:24,000.
1-888-ASK-USGS (voice)
303-202-4693 (FAX)
ask@usgs.gov
USGS Open-File Report 03-50
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Data format: | Debris-flow initiation points in format ArcInfo export (version 8.x) Size: 117 kilobytes |
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Network links: |
<http://pubs.usgs.gov/of/2003/ofr-03-050/downloads/fr-dfip.e00> |
303-273-8626 (voice)
303-273-8600 (FAX)
jgodt@usgs.gov