[Qgis-user] Road Network Extraction out of Raster Images

[Bernd Vogelgesang]

Hi Elvin,

I do not know of any trick how to extract a road network from images
besides a trained image classification model. But may the question be
allowed why you can't just use the OpenStreetMap data directly?

Cheers,
Bernd

Am 18.04.19 um 15:12 schrieb Elvin Roldan:
>
> Hello:
>
> I’m writing because I’ve been a long time user QGIS and really
> appreciate all the work that has been put to it and all the
> initiatives to continue to evolve and maintain it as an important open
> source GIS system.
>
> My question is aim does anybody know how to extract a road network
> using spatial analysis tools within QGIS. I want to extract all roads
> from aerial images to convert to vectors (polylines or polygons) to do
> various analysis involving the existing road network.
>
> If anybody can point me in the right direction  I would appreciated.
>
> Thanks.
>
> Elvin Roldán
>
>
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