I have millions of points (census data) about 1.5Gb in a text file. But I only want to show an area based on this points like a heat map, so maybe I have to build polygons based on these points. What is the correct way for do this? How can I start with this?

  • Welcome to GIS SE! As it stands I think your question is too broad for our focussed Q&A format. Consequently, I recommend that you look through our most frequent questions tagged heatmap to review similar previous questions here with a view to editing yours to make it more focussed on where you are stuck. – PolyGeo Aug 9 '14 at 3:29

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