[GRASS-dev] Total area of a polygon changes by shifting using v.transform in grass6.5

[SWAPAN GHOSH]

Actually I create a vector polygon using vector digitizing tool. My aim is
to shift & rotate the created vector arround some elevated raster map using
v.transform and create newvector.

Now I convert newvector polygon to raster suppose rast1.

Next generate report by passing two raster- elevated-raster, rast1.

After sending this maill I discover that vector area not changes but the
converted raster area not same with vector polygon.


Thanks & Regards,

Swapan

On Sun, Mar 17, 2013 at 2:57 AM, Markus Neteler <neteler at osgeo.org> wrote:

> On Fri, Mar 15, 2013 at 8:50 AM, SWAPAN GHOSH <swap.ghsh at gmail.com> wrote:
> > Any body can help me to recover the problem like-
> > "Total area of a polygon changes by shifting using v.transform in
> > grass6.5"
>
> If I get the question right: intersect "before" and "after" with v.overlay,
> then calculate the resulting area with v.report.
>
> Markus
>
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