john raskulinecz wrote:
Hello Giovanni and T. Gray,
Thanks for the suggestions. When I loaded the plugins and went to
raster>extraction>contour and browsed then entered the file it
said it wasn't recognized as a supported file
type. I think it wants tiffs. Is there by chance a way to convert txt
to tiff or raster that anyone knows of? That would seem to be an ideal
solution.
again, thanks to all who have given me help in the past,
J.R.
I needed to do something similar in the past and this is what I did.
First I was given some kml files of points not a txt file. I turned
that file of points into a shapefile of points. You need to be able to
import your txt file as a vector. If by txt you mean a comma
separated file then you should be able to use the Add Delimited Text
option in the Layer menu. Note that this doesn't load any attribution
just locations. If you need attribution then you can load the csv into
openoffice and save it as dbf and use The Vecor/Data Management/Join
Attributes Menu or look at the documentation for gdal which explanes
how to add a attribute map file to your csv. If your txt file is NOT
csv then you'll probably have to edit it by hand or write a script to
turn it into csv.
Once you have your points loaded then you can use
Raster/Conversion/Rasterize menu to turn it into a raster then
Raster/Extraction/Contour to generate your contour vector.
Hope this helps.
h
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