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I'm looking for a plugin for QGIS that would allow me to create an effective isopleth map. Does one exist? I haven't been able to find any, only independent software that would allow this type of mapping. Any help would be appreciated!

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Could you provide an example of what exactly you are looking to achieve. It's most certainly possible with the core tools. – underdark Feb 6 '14 at 19:51
I have the USGS dataset on landcover and elevation. I have now extracted contours using the core functions, as you mentioned but now I'm trying to create a classified fill, such as on a topographic map. – user26656 Feb 7 '14 at 20:01
After polygonizing the contour lines, the standard graduated renderer should do the trick. – underdark Feb 8 '14 at 13:53

Wouldn't the contour plugin achieve what you want?

isopleth |ˈʌɪsə(ʊ)plɛθ| noun Meteorology a line on a map connecting points having equal incidence of a specified meteorological feature. ORIGIN early 20th cent.: from Greek isoplēthēs ‘equal in quantity’, from Greek isos ‘equal’ + plēthos ‘multitude, quantity’.

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I'm trying this out now. My dataset wasn't in contour form but I'm trying to acquire it in a form usable for this plugin. – user26656 Feb 7 '14 at 18:28

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