Map and Table Calculation

PIXAREA( ) function

Returns the pixel area (square of the pixel size) of a raster map or a georeference.

Syntax

PIXAREA(RasterMap)
PIXAREA(GeoReference.grf)

Input

When used on raster maps:

RasterMap is a raster map

When used on georeferences:

GeoReference.grf is a georeference

Output

PIXAREA returns: a value
Domain: system domain Value

Note:

For georeferences which are not a georeference corners, an approximation of the pixel size is returned.

Tips:

Usable in

Simple calculators, MapCalc, TabCalc

Examples

Pocket line calculator examples:

? PIXAREA(DEM)

returns the pixel area of a raster map DEM, e.g. 400

? PIXAREA(TM.grf)

returns the pixel area of a georeference TM, e.g. 934.97

MapCalc example:

Suppose map InMap has a pixel size of 20.

OutMap = InMap * PIXAREA(InMap)

InMap

OutMap

10 35 20
35 15 40
? 40 30
4000 14000 8000
14000 6000 16000
? 16000 12000

TabCalc example:

OutCol = InCol * PIXAREA(InMap)

 

InCol

OutCol

10

4000

35

14000

20

8000

35

14000

15

6000

40

16000

?

?

40

16000

30

12000

See also:

MAPMAX PIXSIZE
MAPMIN TBLRECS
MAPROWS
MAPCOLS