Citation Information

Title: Ecoregions

Source: Olsen et. al.

Date: 2001

Citation:¬†Olson, D. M., Dinerstein, E., Wikramanayake, E. D., Burgess, N. D., Powell, G. V. N., Underwood, E. C., D’Amico, J. A., Itoua, I., Strand, H. E., Morrison, J. C., Loucks, C. J., Allnutt, T. F., Ricketts, T. H., Kura, Y., Lamoreux, J. F., Wettengel, W. W., Hedao, P., Kassem, K. R. 2001. Terrestrial ecoregions of the world: a new map of life on Earth. Bioscience 51(11):933-938. [online] URL:


Terrestrial ecoregions of the world divided into 867 classes defined by climate, geology, and evolutionary history. Native data is polygon vector format projected in Geographic Coordinate System WGS 1984

Processing Procedure

1. In ArcMap 10.0, convert native data to 30 arc second resolution grid.

2. Use zonal statistics to calculate mean values within each GLU.

Data Coverage

Data is coded by the number of cells covered by the native data (1), data extrapolation (2), and not covered by either (3).

DGG Cell Coverage Report
Coverage Codes Frequency Percent Valid Percent Cumulative Percent
Valid 1 1394363 96.5 96.5 96.5
3 50601 3.5 3.5 100.0
Total 1444964 100.0 100.0


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