[GRASS-user] Reprojection of raster maps in various platforms: projected coordinates are different

Uttam Kumar uttamsinha09 at gmail.com
Tue Oct 13 12:31:11 PDT 2015


You are right. The scene belongs to a small area near Central California
region.

I have available image boundary in SINUSOIDAL projection in vector format
(shp file). How do I share this to grass users ?


On Sat, Oct 10, 2015 at 1:56 PM, Markus Neteler <neteler at osgeo.org> wrote:

> On Thu, Oct 8, 2015 at 9:36 PM, Uttam Kumar <uttamsinha09 at gmail.com>
> wrote:
> > Hi All,
> >
> > This is the projection information of a single Landsat scene in ENVI,
> GRASS
> > and using gdalwarp. GRASS and gdalwarp gave somewhat similar output but
> ENVI
> > is totally different. I have been informed that the projected image from
> > ENVI is correct as verified from the earlier work.
> >
> > Original data (in Sinusoidal Projection)
> > ------------------------------------------------------
> > Corner Coordinates:
> > Upper Left  (-10801805.198W, 4130102.079N)
> > Lower Left  (-10801805.198W, 3971252.079N)
> > Upper Right (-10642955.198W, 4130102.079N)
> > Lower Right (-10642955.198W, 3971252.079N)
>
> So, I generated the upper left *corner* as a point:
> echo "-10801805.198|4130102.079|1" | v.in.ascii input=- output=point
>
> It appears to be located in California. Right?
>
> >
> > Reprojected in GRASS GIS (Lambert Azimuthal Equal Area, Datum: WGS84)
>
> Can you please give more information here?
>
> >
> ----------------------------------------------------------------------------------
> > N:    5564460
> > S:    5185590                        |
> > E:   -5451390
> > W:  -5762490
>
> ... is this the upper box?
> In EU LAEA (EPSG 3035), my SIN point becomes
>
> -674447.24192338|9862187.84799817
>
> ... without data it is hard to say. Could you export your SIN box as a
> SHAPE file and make available?
>
> Markus
>
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