4.38 SPRINGBOK DENSITY

Data ID

Description:

Distribution and relative density of springbok

Chapter:

4 Living Resources

File name:

springbok

File type:

Arcview shapefile

Geographical area:

Namibia

Keywords:

herbivore

springbok

Notes on data, analysis and

Derived from Ministry of Environment and Tourism aerial census data (1998 and 2000) and Ministry of Environment

compilation:

and Tourism farm census data (1998), provided by Colin Craig and Holger Kolberg of DSSS. Aerial census data, with the

number of animals represented by each sighting (based on the sampling frequency), were converted into Thiessen

polygons to obtain density estimates. Densities in areas censused in both years were halved. Farm census data were used

to supplement aerial census data; densities were calculated from the number of animals reported and the farm areas. To

take account of reporting biases, densities calculated from farm census data were adjusted based on areas of overlap

between areas covered by aerial census and farm censuses. The map compiled from these two analyses was then

smoothed, discussed with DSSS staff and amended manually based on field knowledge to produce the final map.

Data quality and organisation

Positional Accuracy:

Very generalised

Vector/Raster:

Vector

Spatial reference

Projection:

Geographic

Fields

Field name

Field description

GRIDCODE

Rank of 1 to 6 representing low to high density

HEAD_KM2

Estimated number of animals per square km

Source/Distribution

Data Source:

DSSS at Ministry of Environment and Tourism.

Distribution notes:

Unrestricted