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On 11/08/2012 12:09, Terry Morse wrote:
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cite="mid:30741963.1344676141543.JavaMail.root@mswamui-backed.atl.sa.earthlink.net"
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<pre wrap="">I'm not sure what I've done differently, but I managed tonight to get the projections to overlap. The counties vector layer appears to have been reprojected to WGS84, and the display projection is NAD 83 (EPSG: 2992). I tried to duplicate this in a second instantiation of QGIS, so far unsuccessfully. I'm going to have to experiment more.
In the interim, When I try to clip the raster file in the successful superimposition to the extent of the counties layer using the raster clipper and get the error message: Computed -srcwin falls outside raster size of 28800x19200. Any idea what that is about?
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<br>
I tried to duplicate your steps. Seems to work fine (QGIS 1.8 on
WinXP OSGeo4W installer)<br>
I downloaded the counties shapefile and loaded it into QGIS. The CRS
was listed as USER:100000 (probably since the Oregon LCC projection
it's not in the proj4 database.) So I left the CRS as is, and set
"On-the-Fly" reprojection. Next I got one tile from GMTED (30
arcsec) and it seems to overlay the counties correctly. (I'm judging
from the coastline and Columbia river, since I don't know where the
actual county boundaries are in the DEM...)<br>
<br>
Next I ran the clipper tool from the Raster menu, and again it
worked as expected. The clipped DEM remained in EPSG:4326, like the
original GMTED. I can send the clipped raster if it will be any
help. <br>
<br>
Since both layers you mentioned have full CRS metadata, I think if
you don't mess with the CRS of the layers, just enable OTF, it will
be fine.<br>
<br>
--<br>
Micha<br>
<br>
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cite="mid:30741963.1344676141543.JavaMail.root@mswamui-backed.atl.sa.earthlink.net"
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Thanks,
Terry
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<pre wrap="">From: richard burcher <a class="moz-txt-link-rfc2396E" href="mailto:drownedfrog@gmail.com"><drownedfrog@gmail.com></a>
Sent: Aug 10, 2012 3:49 PM
To: <a class="moz-txt-link-abbreviated" href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>
Subject: Re: [Qgis-user] Vector/Raster Projection Problem
Hi Terry,
You shouldn't be having such a difficult time getting them to align. I've
done similiar with SRTM/GDEM etc.
Have you projected the shapefile to wgs84 to review alignment?
Can you please put together a small subset clip of raster data for area &
the shapefile you are using. Drop me a the link from Dropbox or other
service & I will take a look over.
Cheers,
Richard
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<pre wrap="">
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