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I've got a list of some hundreds of latitude/longitude pairs close to each other (within a country). I want to create an image with a map, and circles overlaid around these points. Basically, what I need is:

  • an image of a map
  • a way of translating latitude/longitude pairs to pixels

Where can I obtain a fitting map (e.g. roadmap or satellite map) with the parameters needed to plot the points? I suppose there is some FOSS tool that does most of this already?

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1 Answer

The simplest option would be to download QGIS

You should then plot your points using the 'Add Delimited Text layer' if your data is in that format.

Finally, you can use the data from either Shaded Relief, or Natural Earth as the background

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Thanks! Is it possible to use QGIS from the command-line, so that I can use it to generate the image in another script? –  Andreas Nov 6 '12 at 11:20
@Andreas I am not much of an expert on scripting QGIS, so I really don't know whether you can do so or not. –  Devdatta Tengshe Nov 6 '12 at 14:32
you may be looking for GDAL Rasterizer. there is a command line app gdal_rasterize gdal.org/gdal_rasterize.html and OGR do support csv formats or you can convert between diffrent OGR formats like csv to shape using another commandline tool available in the same package ogr2ogr gdal.org/ogr2ogr.html –  rashad Nov 6 '12 at 16:48
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