Predicted vegetation distributions for the historic period (approximately the last 200 years) prior to Euro-American impacts in eastern Idaho and western Wyoming.
This grid was created and compared to the modern GAP data and will serve as a model for predicting vegetation distribution in prior time periods.
This dataset was obtained from Idaho State University's GIS Training and Research Center.
At time of metadata creation.
none
Campus Box 8104
Made available by Idaho State University's GIS Training and Research Center
Data were compiled from 28 pollen cores using cokriging with elevation. Caution is warranted as this is an extremely small sample for the size of the area and the assumption that closely spaced pairs are more similar than distantly spaced pairs is violated.
NA
The elevation data used in cokriging was derived from concatenated 1:24000 (30 m cell resolution) DEMs resampled to a cell resolution of 316.683016 m. Each pollen core's location was adjusted to match the closest cell centerpoint.
The elevation data used in cokriging was derived from concatenated 1:24000 (30 m cell resolution) DEMs resampled to a cell resolution of 316.683016 m.
Data were compiled from 28 pollen cores located in western Wyoming, southeastern Idaho, southwestern Montana and northern Utah. Chronological dates are associated with core depths based on interpolations using the surface, radiocarbon-dated organics, and tephra layers. Data associated with a time range of less than 204 radiocarbon years BP were selected for the analysis. Data from cores that were outside this temporal range were added as necessary to provide more spatial information. Cores that contributed more than one data value were averaged. Twenty four vegetation species were determined to provide the most consistent data and were the most discriminating between vegetation zones. Cokriging with elevation was used to predict vegetation distribution between cores.
Internal feature number.
ESRI
vegetation code
predicted vegetation code for the historic period prior to Euro-American impacts
Subalpine Meadow
Grassland
Mountain Sage
Greasewood/Desert
Sagebrush Steppe
Pinyon/Juniper
Mixed Aspen/Conifer
Mixed Conifers
Mixed Subalpine
Riparian
Sage/Grasslands
Barren Land
Badlands
Lava
Mud Flat
Rock
Sand Dunes
Open Water
Permanent Snow
Campus Box 8005
The information in the GIS layer is the result of digital analyses performed on a database consisting of information from governmental and other credible sources. The accuracy of the information presented is limited to the collective accuracy of the database on the date of the analysis. The information is believed accurate and reasonable efforts have been made to ensure the accuracy of the data. However, the ISU - Anthropology Research GIS Lab expressly disclaims responsibility for damages or liability that may arise from use of this data. The creaton of this grid was made possible by a grant from the National Aeronautics and Space Administration Goddard Space Flight Center. Therefore, this product is public property.
Download via the web at <http://giscenter .isu.edu>
Campus Box 8104
When contacting the GIS Center with questions about the preparation and documentation of this metadata file please use e-mail. Include METADATA QUESTION in the subject line and fully identify the document with which you have a question.