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While importing TIFF image to GRASS GIS, I get an error:

Location PROJ_INFO is:
name: Lambert Conformal Conic
proj: lcc
datum: nad83
a: 6378137.0
es: 0.006694380022900787
lat_1: 36.16666666666666
lat_2: 34.33333333333334
lat_0: 33.75
lon_0: -79
x_0: 609601.22
y_0: 0
no_defs: defined

Dataset PROJ_INFO is:
name: Lat/Lon
proj: ll
datum: wgs84
ellps: wgs84
no_defs: defined

ERROR:
You can use the -o flag to r.in.gdal to override this check and use the location definition for the dataset.
Consider generating a new location from the input dataset using the 'location' parameter.
Provide rolution to remove this error -o in GRASS GIS

3 Answers 3

2

In GRASS, location and dataset should share the same projection.

On-the-fly-reprojection is only available in advanced GIS packages like QGIS or Arcgis.

To change the projection, use gdalwarp to a different filename outside of GRASS.

6
  • (Fri Sep 26 12:12:18 2014) r.out.gdal input=manj@PERMANENT output=C:\xampp\htdocs\learn\doit\1409825221.tif Exporting to GDAL data type: UInt16 Checking GDAL data type and nodata value Input raster map contains cells with NULL-value (no-data). The value 65535 will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. Exporting to GDAL raster r.out.gdal complete. (Fri Sep 26 12:12:20 2014) Command finished (2 sec)
    – user28536
    Commented Sep 26, 2014 at 6:50
  • even also Iam unable to view map on display screen
    – user28536
    Commented Sep 26, 2014 at 6:50
  • How can I give same projection
    – user28536
    Commented Sep 26, 2014 at 6:52
  • Now I changed to same projection again giving error and no map display on screen (Fri Sep 26 12:32:04 2014) r.in.gdal input=E:\cdnh43e_v1.1r1.tif output=cdnh43e_v1 Projection of input dataset and current location appear to match r.in.gdal complete. Raster map <cdnh43e_v1> created. (Fri Sep 26 12:32:06 2014) Command finished (1 sec) Command 'd.rast -o map=cdnh43e_v1@PERMANENT' failed Command 'd.rast -o map=cdnh43e_v1@PERMANENT' failed
    – user28536
    Commented Sep 26, 2014 at 7:01
  • Layer Manager giving this message Command 'd.rast -o map=cdnh43e_v1@PERMANENT' failed and r.buffer cmd prompt giving this message Reading input raster map <cdnh43e_v1@PERMANENT>... Writing output raster map <bufout>...
    – user28536
    Commented Sep 26, 2014 at 8:28
1

As Andre mentioned in GRASS your LOCATION coordinate system must match the coordinate system of the data being input. You can create a new LOCATION when you input the original tiff file by using the location= parameter.

For example:

r.in.gdal input=E:\cdnh43e_v1.1r1.tif output=cdnh43e_v1 location=LCC

Now run:

g.region raster=cdnh43e_v1

to set your current extent and resolution to match the original raster, and you should be good to go with the rest.

1

On-the-fly reprojection, to the spatial reference system of the Location in which the GeoTIFF is to be imported, is possible since the introduction of r.import.

From https://grass.osgeo.org/grass72/manuals/r.import.html:

Imports raster data into a GRASS raster map using GDAL library and reprojects on the fly.

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