States West Water Resources Corporation, October, 2003, Snake/Salt River Basin Plan - 1:24,000 scale Irrigated Lands Mapping, in Decimal Degrees - NAD 1927.Online Links:
- None
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.
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.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
| Value | Definition |
|---|---|
| 0 | Irrigated Land (not an island) |
| 1 | A non-irrigated parcel inside an irrigated polygon |
Water Resources Data System
Project Coordinator
Dept 3943, 1000 E University Ave
Laramie, WY 82071
USA
307-766-6651 (voice)
307-766-3785 (FAX)
wrds@uwyo.edu
- Hours_of_Service: 8:00am to 5:00pm Mon-Fri MT
This dataset was created as part of the Wyoming Water Plan.
Data sources used in this process:
As a base map, United States Geologic Survey digital quadrangles were used for spatial relationship to the non rectified infra-red aerial photos. Accuracy of these digital data (if not digitally revised), is based upon the use of source graphics which are compiled to meet National Map Accuracy Standards. NMAS horizontal accuracy requires that at least 90 percent of points tested are within 0.02 inches of the true position. The digital data are estimated to contain a horizontal positional error of less than or equal to 0.003 inches standard error in the two component directions relative to the source graphic. NMAS vertical accuracy requires that at least 90% of well defined points tested be within one half contour interval of the correct value. Comparison to the graphic source is used as control to assess digital positional accuracy. Cartographic offsets may be present on the graphic source, due to scale and legibility constraints. Digital map elements require edge alignment between data sets. Data along each quadrangle edge are tested against the data set for the adjacent quadrangle; tests check for positional accuracy between data sets within a 0.02 inches tolerance. Features with like dimensionality, and with or without like attribution, that are within the tolerance are adjusted by moving the feature equally in both data sets. Features outside the tolerance are not moved.
Are there legal restrictions on access or use of the data?
- Access_Constraints: Data will be provided through the Water Resources Data Systems
- Use_Constraints:
- This data was created specifically for use in the Wyoming Water Plan Project. The data was designed for use in 1:24,000 scale analyses.
Downloadable Data
These Data were generated for use in conjunction with the Snake/Salt River Basin Plan. The Wyoming Water Development Commission (WWDC) and the Water Resources Data System (WRDS) do not warrant, endorse, or recommend the use of these data for any other purpose. The user assumes the entire risk related to the use of these data. WWDC and WRDS are providing these data "as is", and WWDC and WRDS disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose.
| Data format: | Size: 0.739 |
|---|
CDs may be ordered through the Water Development Commission
Water Resources Data System
Project Coordinator
Dept 3943, 1000 E University Ave
Laramie, WY 82071
USA
307-766-6651 (voice)
307-766-3785 (FAX)
wrds@uwyo.edu
- Hours_of_Service: 8:00am to 5:00pm MT