[GRASS-user] Need help in reprojecting raster images

[sajid pareeth]

Hi Uttam

If I understand you correctly you want to reproject a landsat image from
sinusoidal to laea projection!!
You dont have to manually set the bounding box while reprojecting a raster,
as GRASS will take care of it.

First you create a new location and mapset with desired output projection ,
which in this case is Lamberts Azimuthal Equal Area.
Then get into this mapset, use the following r.proj command.
r.proj location*=input_location* mapset=*input_mapset* input=*input_raster
name* output=
*output_raster*

More details here: https://grass.osgeo.org/grass70/manuals/r.proj.html

If you then need to set your working area to a particular bounding box, use
g.region

g.region raster=*output_raster*

regards

Sajid

On Tue, Sep 22, 2015 at 11:07 PM, Uttam Sinha <uttamsinha09 at gmail.com>
wrote:

>
>
> Hi All,
>
> I have a set of Landsat images in Sinusoidal Projection, WGS84 Datum. I
> know the north, south, east and west extent of the boundary of the image.
>
> I want to reproject the image to Lamberts Azimuthal Equal Area, WGS84
> Datum. I do not know what will be the coordinates of the north, south, east
> and west bounds in this projection.
>
> 1.) How do I convert upper left coordinates and bottom right coordinates
> of Sinusoidal Projection to  Lamberts Azimuthal Equal Area to create a new
> destination Location?
>
> 2.) How do I reproject the images from Sinusoidal to Lamberts without
> georeferencing the image at source location (in sinusoidal projection)
>
> Appreciate any reply.
>
> Uttam.
>
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