Wyoming Land Surface Slope

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: Wyoming Land Surface Slope

Abstract:

This dataset represents land surface slope for Wyoming. The slope result was calculated from the USGS 3-arc-second DEM for Wyoming and resampled to a 100 meter resolution.

For more details about this dataset, please refer to this report:

Hamerlinck, J.D. and Arneson, C.S., editors, 1998, Wyoming Ground-Water Vulnerability Assessment Handbook: Volume 1. Background, Model Development, and Aquifer Sensitivity Analysis: Spatial Data and Visualization Center Publication SDVC 98-01-1, University of Wyoming, Laramie, WY.

1. How should this data set be cited?

   Arneson, Christopher S. , 1998, Wyoming Land Surface Slope: UW Spatial Data and Visualization Center, Laramie, Wyoming.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -111.26477012

   East_Bounding_Coordinate: -103.83670034

   North_Bounding_Coordinate: 44.99903411

   South_Bounding_Coordinate: 40.94837176

3. What does it look like?

   <URL:http://www.sdvc.uwyo.edu/images/slope100.gif> (gif)

   100M Slope

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 1998

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

   2. What coordinate system is used to represent geographic features?

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   Entity_and_Attribute_Detail_Citation:

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Christopher S. Arneson

2. Who also contributed to the data set?

3. To whom should users address questions about the data?

   SDVC Technical Coordinator
   Spatial Data and Visualization Center
   Box 4008 University Station
   Laramie, Wyoming 82071
   USA
   

   307-766-2532 (voice)
   n/a
   

   Hours_of_Service: 8:00 - 5:00 MST

This layer was developed specifically to aid in the creation of a Wyoming ground-water vulnerability to surface contamination study conducted at the Wyoming Water Resources Center. The DRASTIC-based model requires land surface slope as one of its parameters. This layer was specifically developed to aid in small-scale regional analysis within Wyoming.

1. From what previous works were the data drawn?

   dem (source 1 of 1)

   USGS, unknown, 3-arc-second (90m) Digital Elevation Model for Wyoming; <URL:http://www.sdvc.uwyo.edu/clearinghouse/metadata/dem90m.html>.

   Type_of_Source_Media: film

   Source_Scale_Denominator: 250000

   Source_Contribution: main modeling layer

2. How were the data generated, processed, and modified?

   Date: 1998 (process 1 of 1)

   The 3-arc-second DEMs were first imported and joined into a seamless statewide layer. Using the ARC/INFO GRID module a FOCALMEAN routine was run on the NODATA values that existed within the DEM. (These cells normally exist along the western edge of the state where the Idaho quads join the Wyoming quads.) This routine put an average value into those cells based on their surrounding cells. Next, because a 100 meter resolution was needed for the project a LATTICERESAMPLE routine was performed to create a new layer at 100m res. Finally, a SLOPE routine was performed on the DEM to calculate the percent change in each cell.

3. What similar or related data should the user be aware of?

1. How well have the observations been checked?

   see Process Steps

2. How accurate are the geographic locations?

   see Process Steps

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   All cells within the State of Wyoming are attributed.

5. How consistent are the relationships among the observations, including topology?

   does not apply for raster data

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints:

This data should not be used for analysis at a resolution of less than 100 meters. Because updates to this dataset or the attached metadata will occur without notice, this dataset may not be redistributed or repackaged in any form without the express written consent of the University of Wyoming Spatial Data and Visualization Center. Instead it is recommended that additional users download the most current version of the data from <http://www.sdvc.uwyo.edu/clearinghouse>.

1. Who distributes the data set? (Distributor 1 of 1)

   SDVC Technical coordinator
   UW Spatial Data and Visualization Center
   Box 4008 University Station
   Laramie, Wyoming 82071
   USA
   

   307-766-2532 (voice)
   n/a
   

2. What's the catalog number I need to order this data set?

3. What legal disclaimers am I supposed to read?

   The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate used described in this metadata document. The distributor makes no claims for the data's suitability for other purposes. It is strongly recommended that this data is directly acquired from the distributor described above and not indirectly through other sources which may have changed the data in some way.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	ARCE (Arc/Info export) (version 7.0.4) Size: XX megabytes
     Network links:	ftp.sdvc.uwyo.edu or <http://www.sdvc.uwyo.edu/clearinghouse>

   • Cost to order the data:

     No fees are required for downloading the data that is on-line. Some fees may be required to cover costs of tapes if data is required on tape media.

Dates:

Last modified: 27-Feb-1998

Metadata author:

Margo Berendsen
Box 4008 University Station
Laramie, Wyoming 82071
USA

307-766-2532 (voice)
meh@uwyo.edu

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)