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Does anybody know how to create a "minimum bounding polygon" from a set of polygons in QGIS or elsewhere?

For example, in the figure below I can create a Convex Hull per the purple outline, but I'm after a tighter fit that matches the inner reddish shape. I can do a buffer with a small distance, but there are interior holes that are tedious to delete manually.

enter image description here

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    I think what you are after is a Concave Hull which would make this a duplicate of gis.stackexchange.com/q/119663.
    – PolyGeo
    Dec 20, 2014 at 6:25
  • Thanks, great comment and I was not aware of Concave vs Convex Hulls. Without a "direct" solution in QGIS I may run this in PostGIS via postgis.net/docs/ST_ConcaveHull.html or Python if I run across an algorithm.
    – cokrzys
    Dec 20, 2014 at 21:01

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