0

I have an image from a cities districts and their boundaries and I need them as polygons in QGIS.

I tried "Raster -> Conversion -> Polygonize (Raster to vector)" as described here, but that vectorised every single pixel.

Community
  • 1
simskopf
  • 273
  • 1
  • 2
  • 10
  • 2
    You would be better of downloading the Vector SVG file and converting that (will need to be georeferenced) http://gis.stackexchange.com/questions/11476/how-to-import-svg-into-gis svg> http://upload.wikimedia.org/wikipedia/commons/7/7e/N%C3%BCrnberg_Statistischer_Bezirke.svg – Mapperz Jun 10 '14 at 16:23

1 Answers1

1

Since the number of districts is quite low, you could just digitize them manually. That will probably be faster than anything else you try.

Otherwise, as Mapperz commented:

If you cannot get the data in a more appropriate format somewhere else, get the Vector SVG file and convert and georeference that. For more info on that issue see: How to Import SVG into GIS?

http://upload.wikimedia.org/wikipedia/commons/7/7e/N%C3%BCrnberg_Statistischer_Bezirke.svg

Community
  • 1
underdark
  • 84,148
  • 21
  • 231
  • 413