This is the prototype of the function
double G_col_to_easting
(
double
col,
const struct Cell_head *
window
)
For each cell I know the geographic decimal coordinate (for example -78.847804
, -2.814949) but what I'd like to know is its UTM coordinate (x=739254.864 ,
y=9688649.285594).
I don't know how using G_col_to_easting and G_row_to_northing to have these
translations
--- Ven 25/7/08, Glynn Clements <[EMAIL PROTECTED]> ha scritto:
Da: Glynn Clements <[EMAIL PROTECTED]>
Oggetto: Re: [GRASS-dev] A function for obtaining UTM coordinate
A: [EMAIL PROTECTED]
Cc: grass-dev@lists.osgeo.org
Data: Venerdì 25 luglio 2008, 21:03
roberto caselli wrote:
> I need a GRASS function for obtaining for each cell its UTM
> coordinate.
In C, G_col_to_easting() and G_row_to_northing() translate col/row
coordinates to geographic or cartographic coordinates. Note that the
arguments are floating point values, so you need to use e.g. col+0.5
and row+0.5 if you want the coordinate of the cell's centre.
In r.mapcalc, the x() and y() functions return the coordinates of the
cell's centre.
--
Glynn Clements <[EMAIL PROTECTED]>
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