topic Re: output a raster as a text file matrix in Data Management Questions

output a raster as a text file matrix

CatrionaFyffe — Sat, 02 Jul 2011 22:53:55 GMT

Hi,

I would like to be able to output the values of a raster (e.g. the elevation data in a DEM) as a text file so that the values are a matrix. I really don't know where to start! I have used many of the functions of GIS but don't know how to get raw data out of it.

Any help would be much appreciated.

Thanks,

Cat

Re: output a raster as a text file matrix

EricRice — Tue, 05 Jul 2011 14:12:37 GMT

Hi Cat,

I think you should check out the Raster to ASCII tool for this. An example of the resulting raster is below. You can open the ascii file in any text editor.

    NCOLS 480
    NROWS 450
    XLLCORNER 378922
    YLLCORNER 4072345
    CELLSIZE 30
    NODATA_VALUE -32768
    43 2 45 7 3 56 2 5 23 65 34 6 32 54 57 34
    35 45 65 34 2 6 78 4 2 6 89 3 2 7 45 23 5 ...

Regards,
Eric

Re: output a raster as a text file matrix

StephenBarrow — Thu, 21 Jul 2011 00:47:09 GMT

If you are still after this I wrote one and posted it to the online scripts pages. It takes a raster and converts it to a matrix.

Stephen

Re: output a raster as a text file matrix

CatrionaFyffe — Tue, 08 Nov 2011 10:20:06 GMT

Thanks - the Raster to ASCII tool works fine,

Catriona