Hi Group,<br>I'm slowly figuring out how to use grass but encountering the odd problem. Actually, I haven't managed to get much done with grass at all yet but I'm writing that off to the learning curve.<br>At the moment I'm trying to georectify a stitched together google earth image (I'm aware of the various legal issues that go with this and I'm just using a few images to see if the work I want to do is feasible with this type of data, if it is I'll look at purchasing data).<br>
<br>I've imported the raster into grass using gdal, it splits it up into 3 (RGB) files? and I can display it (in the wrong place at the wrong scale). I also have the coordinates of the 4 corner points of the image and those are what I'm using to georeference using the georeferencing tool from the file menu.<br>
<br>I keep getting this error when I hit the "georectify" button in the georeferencing tool:<br><br>Traceback (most recent call last):<br> File "/usr/lib/grass/etc/wxpython/gui_modules/georect.py", line 825, in OnGeorect<br>
self.SaveGCPs()<br>TypeError: SaveGCPs() takes exactly 2 arguments (1 given)<br>Traceback (most recent call last):<br><span style="background-color: rgb(255, 255, 51);"> File "/usr/lib/grass/etc/wxpython/gui_modules/georect.py", line 825, in OnGeorect</span><br style="background-color: rgb(255, 255, 51);">
<span style="background-color: rgb(255, 255, 51);"> self.SaveGCPs()</span><br style="background-color: rgb(255, 255, 51);"><span style="background-color: rgb(255, 255, 51);">TypeError: SaveGCPs() takes exactly 2 arguments (1 given)</span><br>
<br>(python:11374): Gdk-CRITICAL **: gdk_window_set_geometry_hints: assertion `GDK_IS_WINDOW (window)' failed<br><br>GRASS_INFO_MESSAGE(12418,1): Group <morondavaGE> has no target<br>GRASS_INFO_END(12418,1)<br><br>
<br>It also took me a while to figure out how to set up image groups. I'm still not sure if I've got that correct but that doesn't look like what the problem is.<br>I am able to get the image aligned in qgis but stage 2 of my work will involve some simple image classification (no doubt the subject of the next few emails to this list). I'd also like to be able to know enough about how grass works to be able to use it properly so I'm persevering with grass for the time being.<br>
<br>Thanks<br>Matt<br>