Global Land Cover Characteristics
Initially, the Global Land Cover Classification (GLCC) dataset was developed for land cover characterization in a range of environmental research and modelling applications. It is derived from the Advanced Very High Resolution Radiometer (AVHRR) data spanning a 12 month period from April 1992 to March 1993. The AVHHR is a space-borne sensor mounted on the National Oceanic and Atmospheric Administration (NOAA) family of polar orbiting platforms.
This dataset has a global coverage. It is based on a 1 km x 1 km grid, so note that such a resolution is too coarse for micro-scale AEP calculation models! These data are the version 2.0 of the global land cover characteristics data base, see USGS web site for further details.
Various legends exist for this dataset. At EMD, we use the legend from the US Geological Survey, see the table below. In addition to the legend, we (EMD) also suggested a roughness length, z0. This length is shown in the last column of the table.
|ID||Land Cover Type||EMD Roughness Class|
|1||Urban and Built-Up Land||z0=0.400|
|2||Dryland Cropland and Pasture||z0=0.100|
|3||Irrigated Cropland and Pasture||z0=0.100|
|4||Mixed Dryland/Irrigated Cropland and Pasture||z0=0.100|
|11||Deciduous Broadleaf Forest||z0=0.400|
|12||Deciduous Needleleaf Forest||z0=0.400|
|13||Evergreen Broadleaf Forest||z0=0.500|
|14||Evergreen Needleleaf Forest||z0=0.500|
|19||Barren or Sparsely Vegetated||z0=0.020|
|23||Bare Ground Tundra||z0=0.030|
|24||Snow or Ice||z0=0.001|
License and Acknowledgement
This dataset is in the US Public Domain. USGS only asks that proper credit is given while using this dataset. A suggested format is to write:
Credit: U.S. Geological Survey.
Global Land Cover Characteristics Data Base Version 2.0, available at: http://edc2.usgs.gov/glcc/glcc.php (2013).