Glob Cover

Introduction

GlobCover Roughness Data in WindPRO

GlobCover is an ESA initiative which began in 2005 in partnership with JRC, EEA, FAO, UNEP, GOFC-GOLD and IGBP. The aim of the project was to develop a service capable of delivering global composites and land cover maps using as input observations from the 300m MERIS sensor on board the ENVISAT satellite mission. ESA makes available the land cover maps, which cover 2 periods: December 2004 - June 2006 and January - December 2009. See more at: http://due.esrin.esa.int/globcover/

Coverage

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.

Legends

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.

Table: USGS Legend for the GLCC Data with Roughness Classification Data by EMD

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
5	Cropland/Grassland Mosaic	z0=0.070
6	Cropland/Woodland Mosaic	z0=0.150
7	Grassland	z0=0.050
8	Shrubland	z0=0.070
9	Mixed Shrubland/Grassland	z0=0.060
10	Savanna	z0=0.070
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
15	Mixed Forest	z0=0.400
16	Water Bodies	z0=0.0002
17	Herbaceous Wetland	z0=0.030
18	Wooded Wetland	z0=0.100
19	Barren or Sparsely Vegetated	z0=0.020
20	Herbaceous Tundra	z0=0.050
21	Wooded Tundra	z0=0.150
22	Mixed Tundra	z0=0.100
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.

External Link

Global Land Cover Characteristics Data Base Version 2.0, available at: http://edc2.usgs.gov/glcc/glcc.php (2013).