zoran-cuckovic / QGIS-visibility-analysis

Quantum GIS plugin for visibility analysis
GNU General Public License v3.0
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Creating a viewshed polygon for each viewpoint #64

Closed RobShaw77 closed 6 months ago

RobShaw77 commented 2 years ago

I'm trying to do some analysis that captures both where someone can see to but also what they can see. E.g. I can't see very far because my view is blocked by green trees vs concrete building. I was hoping to do this by creating a viewshed polygons for each viewpoint and then intersecting that polyon with a separate land use layer. However, I can't see to find a way to get a polygon output from the tool, other by creating a huge number of target points and using the intervisibility network and creating a bounding envelope.

Could you tell me if what I'm trying to do is possible please?

Thanks Rob

zoran-cuckovic commented 6 months ago

Hello, You can always convert a raster into a vector polygon (Raster -> vectorise [GDAL works perfectly] ). For a single point you can only have 0 and 1 for visibility, so it's just a single click of a button.