3.18 MEDIAN ANNUAL RAINFALL - GRID

 

Data ID

 

Description:

Median annual rainfall

 

Chapter:

3 Climate

 

File name:

Median

 

File type:

ArcView grid

 

Geographical area:

Namibia

 

Keywords:

median

 

 

rainfall

 

 

annual

 

Notes on data, analysis and

The original data for almost 300 stations came from the following report:

 

compilation:

Namibia Resource Consultants. 1999. Rainfall distribution in Namibia: Data analysis and mapping of spatial, temporal,

 

 

and Southern Oscillation Index aspects. Windhoek: Ministry of Agriculture, Water and Rural Development. An

 

 

interpolated grid was created from the point data using a kriging interpolator in Arcview. Grid cell size = 5km

 

 

 

 

 

For incorporation in the atlas, the grid dataset was converted to the projection parameters used in the atlas and masked

 

 

to the country borders. Map units of the grid are in m.

 

Data quality and organisation

 

Positional Accuracy:

interpolation of points - accuracy will be reasonable in areas with clusters of stations and low in areas with few stations

 

Vector/Raster:

Raster

 

Spatial reference

 

Projection:

Albers Conical Equal Area

 

Spheroid

Bessel

 

Standard parallel1

-27

 

Standard parallel2

-19

 

Longitude of central meridian

18.5

 

Latitude of projection origin

-27

 

Fields

 

Field name

Field description

 

Value

Median annual rainfall, in mm

 

Count

Number of cells with the same value

 

Source/Distribution

 

Data Source:

Namibia Resource Consultants. 1999. Rainfall distribution in Namibia: Data analysis and mapping of spatial, temporal,

 

 

and Southern Oscillation Index aspects. Windhoek: Ministry of Agriculture, Water and Rural Development.

 

Distribution notes:

Unrestricted