Generating polygons with streets as borders using QGIS?

Question

I have searched online for almost a week and can not find an answer to my issue.

I need to generate polygons from street borders in a given city.

I have downloaded data from openstreetmaps and imported it into QGIS.

Is there a way to generate polygons and use streets as borders?

Question is duplicate to gis.stackexchange.com/questions/85452/…. Recommended answer is to use the "Polygonize" tool. — user30184, Jun 13, 2014 at 7:49
I think GRASS gives a more comfortable solution for QGIS users (through the GRASS plugin). Import your polylines into GRASS, convert polylines to boundaries, generate centroids and finally clean and build polygon topology. — Zoltan, Jan 26, 2016 at 6:35

Community · Accepted Answer · 2017-04-13 12:34:11Z

2

There's a link Create polygon layer from polyline layer that might help on how to do this in QGIS.

This post mentions dangling lines (lines that don't form a complete boundary) which may or may not be important to you.

If you are after a single polygon that covers all of your roads (guaranteed) then consider a convex hull.

The QGIS documentation gives an exercise that might illuminate.

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answered Jun 13, 2014 at 1:01

Michael Stimson

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