john raskulinecz wrote:
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.
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