Map and Table Calculation

MAPCRD( ) function

Returns the (X,Y) coordinate of a raster map at a certain row, column position.

Syntax

MAPCRD(RasterMap)
MAPCRD(RasterMap, RowNumber, ColumnNumber)

Input

RasterMap	is a raster map
RowNumber	is a row number
ColumnNumber	is a column number

Output

MAPCRD returns:	an (X,Y) coordinate
Domain:	the coordinate system used by the georeference of raster map RasterMap

Note:

MAPCRD is mostly used as input in an expression.

Tips:

This function may be handy to use in DDE applications.
The expression MAPCRD(RasterMap) returns the coordinates of the raster map at the current row, column position (MapCalc only).
When the definition symbol = is used, a dependent output map or dependent output column is created; when the assignment symbol := is used, the dependency link is immediately broken after the output map/column has been calculated.

Usable in

Simple calculators, MapCalc, TabCalc

Examples

Pocket line calculator examples:

? MAPCRD(DEM, 120,150)

returns the coordinate of a raster map DEM at row 120 and column 150, e.g. (798470.00,8088130.00).

? DIST(MAPCRD(Geology,1,1),MAPCRD(Geology,1,MAPCOLS(Geology)))

returns the distance (e.g. 12720.000 m) of a pixel at the left boundary and a pixel at the right boundary of map Geology. Since the map has a rectangular shape you can use any row number you like. In this example the first one is taken.

Note: The function MAPCOLS returns the number of columns in a map. Therefore, it is unnecessary to put the map on the screen to find out which column is the last one.

TabCalc examples:

LanduseCrd=MAPCRD(Landuse,Row,Col)

Tmb1Crd=MAPCRD(Tmb1,Row,Col)

Tmgeo.grf opened as table

X

Y

Row

Col

LanduseCrd

Tmb1Crd

1

801490

8089155

23

90

(797270.00,8090070.00)

(801489.15,8089154.06)

2

802004

8075147

471

205

(799590.00,8081110.00)

(802013.11,8075141.54)

3

800242

8074191

510

156

(798590.00,8080330.00)

(800251.34,8074210.12)

4

802445

8077922

379

201

(799490.00,8082950.00)

(802471.55,8077928.79)

5

802841

8076212

433

224

(799950.00,8081870.00)

(802805.90,8076196.50)

6

797727

8076145

461

61

(796690.00,8081310.00)

(797718.58,8076137.76)

7

805768

8086385

90

247

(800410.00,8088730.00)

(805767.38,8086388.24)

Note:

As maps Landuse and Tmb1 use different georeferences, the returned coordinates in the output columns are not the same.

COORD	MINCRDX	MAPROW	RASVALUE
CRDX	MINCRDY	MAPCOL	DIST
CRDY	MAXCRDX	MAPVALUE	DIST2
TRANSFORM	MAXCRDY

	X	Y	Row	Col	LanduseCrd	Tmb1Crd
1	801490	8089155	23	90	(797270.00,8090070.00)	(801489.15,8089154.06)
2	802004	8075147	471	205	(799590.00,8081110.00)	(802013.11,8075141.54)
3	800242	8074191	510	156	(798590.00,8080330.00)	(800251.34,8074210.12)
4	802445	8077922	379	201	(799490.00,8082950.00)	(802471.55,8077928.79)
5	802841	8076212	433	224	(799950.00,8081870.00)	(802805.90,8076196.50)
6	797727	8076145	461	61	(796690.00,8081310.00)	(797718.58,8076137.76)
7	805768	8086385	90	247	(800410.00,8088730.00)	(805767.38,8086388.24)