Alpine Loop Steep Slopes

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Computer Terrain Mapping, Inc.

Publication_Date: 2005

Title: Alpine Loop Steep Slopes

Geospatial_Data_Presentation_Form: map

Description:

Abstract:

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.

Purpose:

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.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2003

Ending_Date: 2005

Currentness_Reference:

Data were retrieved from various sources and analyzed between 2003 and 2005. See Data Quality Information for time information for source data.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -107.8725478

East_Bounding_Coordinate: -107.2256611

North_Bounding_Coordinate: 38.08819806

South_Bounding_Coordinate: 37.73515861

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Conservation

Theme_Keyword: Development

Theme_Keyword: Slope

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Place_Keyword: North America

Place_Keyword: Colorado

Place_Keyword: San Juan Mountains

Place_Keyword: Ouray County

Place_Keyword: San Juan County

Place_Keyword: Hinsdale County

Place_Keyword: San Miguel County

Place_Keyword: Ouray

Place_Keyword: Silverton

Place_Keyword: Lake City

Access_Constraints: None

Use_Constraints: None.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Hours_of_Service: 8:00-5:00 MT

Data_Set_Credit:

This data set is the product of a collaborative process between numerous agencies, organizations and interested individuals from the beautiful Alpine Loop region.

Native_Data_Set_Environment:

GRASS version 5 on Red-Hat Linux version 8.0 exported to an ASCII Grid

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Determined from a variety of data sources of unknown accuracy.

Logical_Consistency_Report:

Data are calculated from a variety of data sources of unknown accuracy. Only basic spot checking based on knowledge of terrain was performed.

Completeness_Report:

Slope was computed from USGS DEMs (from National Elevation Dataset). This data set completely covers the study area.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey (USGS), EROS Data Center

Publication_Date: 1999

Title: National Elevation Dataset

Publication_Information:

Publication_Place: Sioux Falls, SD

Publisher: U.S. Geological Survey

Online_Linkage: <http://gisdata.usgs.net/ned/>

Type_of_Source_Media: digital data

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1999

Ending_Date: Unknown

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: NED

Source_Contribution: Elevation data.

Process_Step:

Process_Description:

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).

Source_Used_Citation_Abbreviation: NED

Process_Date: 2005

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 1256

Column_Count: 1863

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 13

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: .9996

Longitude_of_Central_Meridian: -105 00 00

Latitude_of_Projection_Origin: 00 00 00

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 30.0

Ordinate_Resolution: 30.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (NAD83)

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Slope grid cell

Entity_Type_Definition: Any of the data elements in the slope map

Entity_Type_Definition_Source: author

Attribute:

Attribute_Label: slope cell value

Attribute_Definition:

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%.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 3

Attribute_Definition_Source: author

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Resource_Description: Alpine Loop Spatial Analysis and Mapping Project

Distribution_Liability:

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.

Custom_Order_Process: Contact distributor to receive additional copies.

Metadata_Reference_Information:

Metadata_Date: 200504

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Hours_of_Service: 8:00-5:00 MT

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998