Computer Terrain Mapping, Inc.
2005
Alpine Loop Steep Slopes
map
The Alpine Loop slope data set shows the distribution of steeply sloping
hillsides in the study area. This data set is one of the development
constraints used to determine Development Potential.
Construction on steep slopes increases the disturbed area for
a building location vs. an equivalent site on flat ground.
This increased disturbance opens more ground to erosion
(and subsequent down slope sedimentation), invasive weeds and
visual impacts.
The Alpine Loop Spatial Analysis and Mapping Project inventoried
natural and cultural resources and identified important areas where
overlapping resources occur. The results from this project will
provide an opportunity for area stakeholders - landowners, outdoor
enthusiasts, surrounding communities, federal government agencies
and local and national preservation groups - to come together to
find solutions that maintain the Alpine Loop experience for future
visitors and residents, while working within the framework of
landowner objectives as well as local and federal government goals.
The Alpine Loop Spatial Analysis and Mapping Project analyzed the
Alpine Loop landscape, considering important natural and cultural
resources along with the likelihood of development based upon
building constraints. The Project aims to provide a planning tool
for area stakeholders as they consider the variety of land
management options and the future of this magnificent region. The
next logical step will be to craft solutions that work within the
framework of landowner desires, local and federal government land
management goals, and available financial and technical resources
to manage the area in a way that preserves the Alpine Loop
experience for future generations.
While the Alpine Loop lies within three counties - San Juan,
Hinsdale and Ouray - the analytical work extended into a portion
of San Miguel County. The resulting mapping and analyses will:
1. Create a spatial foundation to aid future projects in the
Alpine Loop corridor;
2. Serve as a prioritization tool for evaluating the
conservation potential of individual private parcels;
3. Provide the necessary framework for pursuing future
funding opportunities.
2003
2005
Data were retrieved from various sources and analyzed between 2003
and 2005. See Data Quality Information for time information for
source data.
None Planned
-107.8725478
-107.2256611
38.08819806
37.73515861
None
Conservation
Development
Slope
None
United States
North America
Colorado
San Juan Mountains
Ouray County
San Juan County
Hinsdale County
San Miguel County
Ouray
Silverton
Lake City
None
None.
Computer Terrain Mapping, Inc.
Ed Russell
President
mailing
PO Box 4982
Boulder
CO
80306
USA
303.444.1670
303.443.4856
ctm@ctmap.com
8:00-5:00 MT
This data set is the product of a collaborative process between numerous
agencies, organizations and interested individuals from the beautiful
Alpine Loop region.
GRASS version 5 on Red-Hat Linux version 8.0 exported to an ASCII Grid
Determined from a variety of data sources of unknown accuracy.
Data are calculated from a variety of data sources of unknown accuracy.
Only basic spot checking based on knowledge of terrain was performed.
Slope was computed from USGS DEMs (from National Elevation Dataset). This
data set completely covers the study area.
U.S. Geological Survey (USGS), EROS Data Center
1999
National Elevation Dataset
Sioux Falls, SD
U.S. Geological Survey
<http://gisdata.usgs.net/ned/>
digital data
1999
Unknown
publication date
NED
Elevation data.
computed slope from NED and represented as the quotient of the
vertical rise over the horizontal run (% slope) and reclassified
slopes of less than 20% as 0 (no restriction of development
potential due to steep slopes); 20 - 30% as low constraint (1);
30 - 40% as medium constraint (2); and >40% as high constraint (3).
NED
2005
Raster
Grid Cell
1256
1863
Universal Transverse Mercator
13
.9996
-105 00 00
00 00 00
500000
0
coordinate pair
30.0
30.0
METERS
North American Datum of 1983 (NAD83)
GRS 1980
6378137
298.257222101
Slope grid cell
Any of the data elements in the slope map
author
slope cell value
The value represents a reclassification of the steepness of the slope
where 0 (no restriction of development potential due to steep slopes)
indicates a slope less than 20%; 1: 20 - 30%; 2: 30 - 40% and 3: >40%.
author
0
3
Computer Terrain Mapping, Inc.
Ed Russell
President
mailing
PO Box 4982
Boulder
CO
80306
USA
303.444.1670
303.443.4856
ctm@ctmap.com
Alpine Loop Spatial Analysis and Mapping Project
Computer Terrain Mapping, Inc. (CTM) provides this data set as is. CTM makes
no guarantee or warranty concerning the accuracy of information contained
in the data. CTM further makes no warranties, either expressed or implied
as to any other matter whatsoever, including, without limitation, the
condition of the product, or its fitness for any particular purpose. The
burden for determining fitness for use lies entirely with the user.
Although this data has been processed successfully on computers at CTM, no
warranty, expressed or implied, is made by the CTM regarding the use of
this data on any other system, nor does the fact of distribution
constitute or imply any such warranty.
Contact distributor to receive additional copies.
200504
Computer Terrain Mapping, Inc.
Ed Russell
President
mailing
PO Box 4982
Boulder
CO
80306
USA
303.444.1670
303.443.4856
ctm@ctmap.com
8:00-5:00 MT
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998