[Qgis-user] split polygon with lines seems not working correctly

[Andrea Giudiceandrea]

Hi Luigi,
I think you can proceed this way:

- using the "Polygons to lines" tool, convert your the polygon layer
(building.shp) to lines

- using the "Merge vector layers" tool, merge your line layer (line.shp) and
the layer generated by the previous step

- using the "Polygonize" tool, create a new polygon layer from the layer
generate by the previous step

As a side note, it seems to me that the reference system of your layers is
wrong: it is set as geographic 4326:WGS84 but the coordinates of the
vertices are clearly in meters and not in degrees, so it should be a
projected coordinate system like an UTM one.




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