[GRASS-user] Query raster type

[patrick s.]

Hi Micha and Nikos

This was exactly what I was looking for! "Eval" seems a bit more 
straightforward, as I do not need to query the string, but both 
approaches seem to be valid.

Thanks a lot!
Patrick



/for i in `g.list type=rast`//
//do //
//    echo "adding layer '$i'" //
//    eval `r.info -g $i`//
//    if [ $datatype == "CELL" ] //
//    then//
//        v.db.addcolumn map=pt_grid column="$i integer"//
//    else//
//#    if ( $datatype == 'DCELL' ) //
//        v.db.addcolumn map=pt_grid column="$i double"//
//    fi//
//    v.what.rast map=pt_grid rast=$i col=$i//
//done;//
/

On 25.07.2015 19:47, Micha Silver wrote:
>
>
> On 07/25/2015 08:08 PM, patrick s. wrote:
>> Dear all
>>
>> Is there a function in GRASS70 to match multiple rasters as values to 
>> a point-vector. Some of the rasters are of type integer, some of type 
>> float and the columns should ideally respect the datatype. It might 
>> be possible as a bash.loop on v.what.rast, but I do not find a way to 
>> query the datatype of a raster and get warnings:
>
> You can use r.info -g to get information about each rast, including 
> datatype.
> So:
> eval `r.info -g $i`
> will put all raster parameters into shell variables, among them datatype.
> if ( $datatype == 'CELL' ) ...
>> /
>> for i in `g.list type=rast ` #ideally //only type integer OR float
>> //do //
>> //    echo "adding layer '$i'" //
>> //    v.db.addcolumn map=pt_grid column="$i double" #adapt datatype 
>> of column according to raster type//
>> //    v.what.rast map=pt_grid rast=$i col=$i//
>> //done;
>>
>> /Happy about any help and hint,
>> Patrick
>> /
>> /
>>
>>
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