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From the toolbox use the "Densify Geometries Given An Interval" tool and specify how far apart in map coordinates you want your extra vertices: Note that my lines aren't exact multiples of the distance so you get some closer points (see bottom right). The other "Densify Geometries" tool adds a fixed number of verts regardless of the length of the line ...


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Here is a...unique(??) way of doing it. I managed to create routes using QGIS 2.14 with GRASS and rasters. I got the idea from here. To summarize we will rasterize the land and sea, run a proximity algorithim, invert the output, run a cost, and drain algorithm in GRASS and finally polygonize the routes to polylines. 1) Rasterize your land and sea. First ...


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I figured out the reason --- I had the parameter has_rcost:= true, which apparently caused pgr_dijkstra() to fallback on version 2.0. Removing this parameter and I got results in agreement with the pgrouting 2.2 manual.


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Ok, so I figured it out. It was a two part problem. First, using the source of the start node IS the correct way to produce a matchup. Second, my left join at the end was joining to id1 instead of id2 produced by the pgr_drivingDistance function. That caused it to relate to the wrong entities, producing the results in a different part of the country. As ...



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