I am working with QGIS and I have two different polygons, one with municipalities and another with conservation units (from Brazil).

I need find out which Conservation units falls within 50 km from every municipality.

It would be great to create a new polygon layer only with municipalities that are close to a Conservation Unit and with an attribute called UCs that contains every Conservation Units within a 50 km distance (but also keeping the original municipalities attributes).

Have I made myself clear?

I'm using QGIS because it seems easier , but, latter on, I will read this data from R. If the calculations are performed better with R, it would be better for me.

  • 3
    Have you tried making a 50km buffer round your municipalities and then intersecting with conservation units? You need to decide if conservation units can be partly or totally inside your 50km region though. Can also be done in R with rgeos package and gBuffer function. – Spacedman Jan 20 '17 at 18:05

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