I'd like to draw an area around a certain point. I don't want a simple circle of 800 meters diameter, but a shape that is the result of the endpoints of lines, starting at my point and following all the roads it can find for 400 metres.
My available data is QGIS in version 2.14.13, a csv layer with those points and all kind of OSM layers.
Any idea how to do that? I guess that I'd need to have the streets as a vector layer, so I would have to extract them within the are of 400 meters around my points, right?