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| Title | Global Land Cover Characteristics 1993 (USGS EROS) |
| Date | 1993-03-31 (creation) |
| Presentation form | Map Digital |
| Language | en |
| Character set | Utf8 |
| Abstract | The Global Land Cover Characteristics Data Base v2.0 (GLCC) is the source data for eight maps in the GLCC collection. A primary data set identifying 96 land classes - Global Ecosystems – forms the basis for seven additional GLCC data products: IGBP Land Cover, USGS Land Use/Land Cover, Simple Biosphere Model, Simple Biosphere 2 Model, Biosphere Atmosphere Transfer Scheme, Matthews Land Cover, and Vegetation Lifeforms.The GLCC database was generated by the U.S. Geological Survey's (USGS) National Center for Earth Resources Observation and Science (EROS), the University of Nebraska-Lincoln (UNL) and the Joint Research Centre of the European Commission. GLCC was derived from the National Oceanic and Space Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) data collected daily over a 12-month period from April 1992 through March 1993. It is made available through USGS EROS Data Center. Map data was converted for use in TerraViva!® global data-viewing software by ISCIENCES, L.L.C., Ann Arbor, Michigan, USA. |
| Supplemental Information | The downloadable file contains the entire collection of eight GLCC maps at 2 arc minute and 5 arc minute resolution. The 30 arc second maps are available at www.terraviva.net. System Requirement: To use the downloadable data file (*.xtvm) you must have TerraViva!® Global Data Viewer or TerraViva!® Global Data Analyst software installed. A free copy of TerraViva!® Global Data Viewer is available at www.terraviva.net. For more information about this map collection see TerraViva!® Map Guide in "Distribution Info>Data for Download" below. |
| Purpose | The GLCC database was an international project undertaken by a number of organizations under the auspices of the International Geosphere-Biosphere Programme (IGBP) and NASA. The US Geological Survey EROS Data Center performed the technical task of creating the land cover map by interpreting space remote sensing data. GLCC was developed at the request of scientists interested in the study of global environmental change. These scientists believed that existing maps of land cover were inadequate to represent current conditions, and they sought an improved, updated map in order to properly model effects of climate change and other global environmental processes. |
| Status | Completed |
| Topic category | Environment |
| Descriptive keywords | TerraViva, global, global land cover, ecosystems, GLCC, landcover, NOAA, NASA, AVHRR, EROS, IGBP (theme). |
| Descriptive keywords | World (place). |
| Spatial representation type | Grid |
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| Access constraints | |
| Use constraints | |
| Other constraints | CONSTRAINTS: "Parts or all of the dataset can be freely downloaded for further use in scientific applications under the condition that the source will be properly quoted in published papers or journals... Reproduction of part or the totality of the database for non commercial distribution, i. a. via the Internet, is authorised, provided that the user obtains written permission from the GLC2000 project and ensures proper referencing of the source... Whenever the digital database will be used for commercial purposes, a commercial license must be requested to the GLC2000 project of the JRC." CITATION: "Global Land Cover 2000 database. European Commission, Joint Research Centre, 2003, http://www-gem.jrc.it/glc2000." Also, "Olson, J.S. 1994. Global Ecosystems Framework: Definitions. USGS EROS Data Center Internal Report, Sioux Falls, SD, 37p." [Constraints as stated in "Data Access and Redistribution." http://www-gvm.jrc.it/glc2000/Products/disclaimer.htm] |
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