This website uses cookies. By continuing to use this website you are agreeing to our use of cookies. 



ACITES: Land cover data for the Olson and Global Land Cover Facility data sets

Latest Data Update: 2018-06-15
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2018-10-16
Download Stats: last 12 months
Dataset Size: 4 Files | 770KB


Model grid cell areas and land cover data for the Olson and Global Land Cover Facility. Data are regridded to a consistent 3 x 3 degree resolution and saved in NetCDF format.
The Olson land cover dataset was developed from Advanced Very High Resolution Radiometer (AVHRR) Normalized Difference Vegetation Index (NDVI) composites covering 1992-1993.
The Global Land Cover Facility dataset was developed from monthly satellite sensor data of NDVI values for 1987.

Citable as:  Wild, O.; Evans, M.J.; Stevenson, D. (2018): ACITES: Land cover data for the Olson and Global Land Cover Facility data sets. Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: ACITES, Atmospheric Chemistry, Land Cover


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Land cover data regridded to the same resolution
as the HTAP model results, approximately 3 x 3 degrees.

1. The data is in NetCDF format

2. The area for each 3 x 3 degree grid cell is in

3. The land cover data for the Olson and Global Land Cover Facility
data sets are in: and

4. The original Olson land cover data set was obtained from:

5. The original Global Land Cover Facility data set was obtained from:

6. See Hardacre et al., Atmos. Chem. Phys., 15, 6419-6436, 2015,
doi:10.5194/acp-15-6419-2015 for further details on the data
sets used in this study.

File Format:

Process overview

This dataset was generated by the computation detailed below.

ACITES: Python code used to produce the NetCDF files


Python code used to produce the NetCDF files in the htap_data, land_surface_data and measurement_data direc

Input Description


Output Description


Software Reference


  • units: m2
  • long_name: area of each grid cell
  • var_id: area3x3
  • units: fraction
  • long_name: bare_ground
  • standard_name: fractional_cover_of_land_cover_class_bare_ground
  • var_id: bare_ground
  • units: fraction
  • long_name: coniferous_tree
  • standard_name: fractional_cover_of_Wesely_land_cover_class_coniferous_tree
  • var_id: coniferous_tree
  • units: fraction
  • long_name: crops
  • standard_name: fractional_cover_of_land_cover_class_crops
  • var_id: crops
  • units: fraction
  • long_name: deciduous_tree
  • standard_name: fractional_cover_of_Wesely_land_cover_class_deciduous_tree
  • var_id: deciduous_tree
  • units: fraction
  • long_name: desert
  • standard_name: fractional_cover_of_Wesely_land_cover_class_desert
  • var_id: desert
  • units: fraction
  • long_name: grass_land
  • standard_name: fractional_cover_of_Wesely_land_cover_class_grass_land
  • var_id: grass_land
  • units: fraction
  • long_name: grassland
  • standard_name: fractional_cover_of_land_cover_class_grassland
  • var_id: grassland
  • units: degrees_north
  • long_name: latitude
  • var_id: lat
  • units: degrees_east
  • long_name: longitude
  • var_id: lon
  • units: fraction
  • long_name: no_data
  • standard_name: fractional_cover_of_land_cover_class_no_data
  • var_id: no_data
  • units: fraction
  • long_name: shrub_bare_ground
  • standard_name: fractional_cover_of_land_cover_class_shrub_bare_ground
  • var_id: shrub_bare_ground
  • var_id: snow_ice
  • units: fraction
  • long_name: snow_ice
  • standard_name: fractional_cover_of_land_cover_class_snow_ice
  • units: fraction
  • long_name: tropical_forest
  • standard_name: fractional_cover_of_Wesely_land_cover_class_tropical_forest
  • var_id: tropical_forest
  • units: fraction
  • long_name: tundra
  • standard_name: fractional_cover_of_land_cover_class_tundra
  • var_id: tundra
  • var_id: urban
  • units: fraction
  • long_name: urban
  • standard_name: fractional_cover_of_Wesely_land_cover_class_urban
  • var_id: water
  • units: fraction
  • long_name: water
  • standard_name: fractional_cover_of_land_cover_class_water
  • units: fraction
  • long_name: wetland
  • standard_name: fractional_cover_of_Wesely_land_cover_class_wetland
  • var_id: wetland
  • units: fraction
  • long_name: wooded_grassland
  • standard_name: fractional_cover_of_land_cover_class_wooded_grassland
  • var_id: wooded_grassland

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent