Hi,
V.Transform cannot transform an XY location to
a Projected Location, say WGS-84.
However if it is a projected location… then V.Transform can Change to another projection.
So if a beginer
And then it dawns upon him, that it must be projected…
HE HAD IT…
Developers please clear this lacuna.
ThanQ
Ravi Kumar
Yahoo! FareChase - Search multiple travel sites in one click.
Ok, so you have your unprojected vector layer digitised from an
unprojected raster map.
To project both now:
1. Project your raster map in Grass first.
2. Export the unprojected vector to a shapefile and import to the
destination location, where the background . It won't fit to your
projected raster - of couerse
In the "group" directory of you source location there is a file which
stores points you marked with i.poins when calibarting raster.
3.
Dive into your grassdata/caves_xy/wlasnosc/group/wlasnosc
Use the same coordinates for
On ¶ro, 2005-11-23 at 04:09 -0800, RAVI KUMAR wrote:
Hi,
V.Transform cannot transform an XY location to
a Projected Location, say WGS-84.However if it is a projected location.. then V.Transform can Change to
another projection.So if a beginer
1. Scans a map
2. Spends days painstakingly to vectorise it..And then it dawns upon him, that it must be projected..
HE HAD IT..Developers please clear this lacuna.
ThanQ
Ravi Kumar______________________________________________________________________
Yahoo! FareChase - Search multiple travel sites in one click.
--------------------
W polskim Internecie s± setki milionów stron. My przekazujemy Tobie tylko najlepsze z nich!
http://katalog.epf.pl/
Sorry for my previous email, my finger slipped and sent to soon.
Ok, so you have your unprojected vector layer digitised from an
unprojected raster map.
To project both do:
1. Project your raster map in Grass first (i.group, i.target, i.points,
i.rectify).
2. Export the unprojected vector to a shapefile and import to the
destination location, where your projected raster is stored. The vector
won't fit yet to your projected raster - of course - but you will fix it
with v.transform in next setps.
3. In the "group" directory of you source location there is a file
"POINTS" which was created by i.points when calibarting raster. Format
those points according to NOTES from v.transform manual page. Save the
file in you home dir as, say, "ravi_points"
4. v.transform input=your_unprojected_vector output=projected_vector
pointsfile=~/ravi_points.
Does this work (honestly, I haven't tried)?
Maciek
--------------------
W polskim Internecie s± setki milionów stron. My przekazujemy Tobie tylko najlepsze z nich!
http://katalog.epf.pl/
ThanQ Maciek Sieczka
This works and we have been doing this to rescue, those vectors hurriedly done
without projecting the raster before vectorisation.
This is a solution, but
U export XY vector as a shape
Then import it into a projected location, to do the job.
I hope one day this will be simplified.
Thanks again
Ravi Kumar
:
Sorry for my previous email, my finger slipped and sent to soon.
Ok, so you have your unprojected vector layer digitised from an
unprojected raster map.To project both do:
- Project your raster map in Grass first (i.group, i.target, i.points,
i.rectify).- Export the unprojected vector to a shapefile and import to the
destination location, wher! e your projected raster is stored. The vector
won’t fit yet to your projected raster - of course - but you will fix it
with v.transform in next setps.- In the “group” directory of you source location there is a file
“POINTS” which was created by i.points when calibarting raster. Format
those points according to NOTES from v.transform manual page. Save the
file in you home dir as, say, “ravi_points”- v.transform input=your_unprojected_vector output=projected_vector
pointsfile=~/ravi_points.Does this work (honestly, I haven’t tried)?
Maciek
W polskim Internecie s± setki milionów stron. My przekazujemy Tobie tylko najlepsze z nich!
http://katalog.epf.pl/
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