| substrate chem | |
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Data format: Shapefile File or table name: substrate chem Theme keywords: subzone, vegetation, map, soil, temperature, substrate pH, CAVM, pH, chemistry |
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Abstract:
Substrate pH
Differences in substrate chemistry have important effects on dominant plant communities. Some of the most important effects are related to soil pH, which governs the availability of essential plant nutrients. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Substrate pH Differences in substrate chemistry have important effects on dominant plant communities. Some of the most important effects are related to soil pH, which governs the availability of essential plant nutrients.
There are no common base maps that show this essential difference in substrate chemistry, so the CAVM substrate map was derived from a wide variety of available sources including soil, surficial geology, and bedrock geology maps, and from spectral patterns that could be recognized on the AVHRR base image.
publication date
Data provided by the Alaska Geobotany Center are copyright protected under the provisions of a Creative Commons Attribution-NonCommercial-ShareAlike License (http://creativecommons.org/licenses/by-nc-sa/1.0/). Materials may be freely downloaded, reprinted and redistributed for non-commercial use. Reproduction and redistribution of the materials on this web site, including derivative works, shall give credit to the Alaska Geobotany Center and remain subject to the above license. Any web pages that use this material shall contain a link pointing to the Alaska Geobotany Center home page (http://www.geobotany.uaf.edu/).
Institute of Arctic Biology
University of Alaska Fairbanks
(AVHRR) data were obtained from theUSGS Global AVHRR 10-day composite data. (http://edcdaac.usgs.gov/1KM/1kmhomepage.asp). Glaciers and oceans were masked out using information from the Digital Chart of the World (ESRI 1993).
The map was reviewed by the CAVM mapping team.
Coverage topology was checked using the NODEERRORS and LABELERRORS commands.
complete
Polygon boundaries were overlaid on the false-color infrared basemap and visually inspected.
False-color infrared basemap, NDVI
Digital elevation model
coastline and glacier masks
Coastline and glacier polygons that had an area < 49,000,000 square meters were deleted from the dataset by the ELIMINATE command.
Coastlines were simplified to a weed tolerance of 5000 m using the bendsimplify option.
Cleaned simplified coastline with a fuzzy tolerance of 500 m.
Repeated step 1 (deleted all Coastline and glacier polygons that had an area < 49,000,000 sq m)to remove any small polygons that may have been created during the clean process.
Metadata imported.
Metadata imported.
Internal feature number.
ESRI
Feature geometry.
ESRI
The landscape map was derived from topographic data, regional physiographic maps, and visual interpretation of the AVHRR false-CIR image. Landscape codes were assigned to each of the vegetation polygons. Keywords Theme Theme_Keyword_Thesaurus none Theme_Keyword vegetation Theme_Keyword map Theme_Keyword landscape Theme_Keyword CAVM Theme_Keyword elevation Theme_Keyword hydrology Theme_Keyword topography Theme_Keyword water Place Place_Keyword_Thesaurus none Place_Keyword United States Place_Keyword cicumpolar arctic Place_Keyword Iceland Place_Keyword Norway Place_Keyword Canada Place_Keyword Greenland Place_Keyword Russia Place_Keyword Svalbard Place_Keyword Alaska Access_Constraints none Use_Constraints none Point_of_Contact Contact_Information Contact_Person_Primary Contact_Organization_Primary Contact_Organization_Primary Contact_Organization Alaska Geobotany Center Contact_Position GIS & Remote Sensing Manager Contact_Address Address_Type mailing and physical address Address Institute of Arctic Biology Address University of Alaska Fairbanks City Fairbanks State_or_Province AK Postal_Code 99775 Country USA Contact_Voice_Telephone 907.474.1540 Contact_Electronic_Mail_Address geobotany@uaf.edu Data_Set_Credit
Alaska Geobotany Center
University of Alaska Fairbanks
none
Institute of Arctic Biology
University of Alaska Fairbanks