I created isochrones using Iso-Area as polygons algorithm is QGIS. I would like to calculate the proportion of the population covered by the created isochrones. Is there any tool in QGIS to do this?

  • 1
    Depends on the population data you've got.
    – Erik
    Feb 4, 2021 at 11:02
  • Use zonal statistics, see e.g. here for a similar problem (population as raster layer, overlay with a polygon): gis.stackexchange.com/a/382557/88814
    – Babel
    Feb 4, 2021 at 11:25
  • Maybe this iso4app.com/index.jsp can help you Feb 4, 2021 at 11:28
  • @Erik I have not collected the data yet. which type of population data do I need for this analysis?
    – Elham
    Feb 5, 2021 at 9:30
  • I'd go with Pop-density, then you can intersect and calculate the approx. pop based on the area of the intersections.
    – Erik
    Feb 5, 2021 at 9:56


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