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I am trying to develop hotspot map showing point density in our gis based web application.

After searching for an option I have decided to use v.kernel command. I have a table containing some point data ie crime data. I need to display the hotspot of crime for a particular area.

In v.kernel vector file containing points and polygon are used for displaying hotspots/heatmaps. In qgis there is an option for selecting some rows and exporting it to shape file. Is there any option for running this command from a python file or is there any better option for displaying hotspot/heatmaps? I have tried openlayers heatmap, python's heatmap and django-heat app but nothing seems to work for me. I am using openlayers tms(Openlayers-2.12) for displaying maps generated through mapnik and tilecache.

Thanks in advance.

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