Let’s try to provide a complete answer to this quite frequent question. Basically, when you get the “straight line”, it means that the RoadManager got an error. So, first of all, in your code, you should check the result of getRoad, this way: if (road.mStatus != Road.STATUS_OK){ //handle error… warn the user, etc. } Now, … Read more
You need to implement the next section of the Quick Start Guide: you’ve initialized the map, but haven’t added any tile layers to it, hence gray. So read on to the section beginning with Next we’ll add a tile layer to add to our map.
By default QtWebEngine does not set default headers like popular browsers do. In this case the openstreetmap server needs to know the “Accept-Language” to produce the maps since for example the names of the cities will depend on the language to filter non-browser traffic. The solution is to implement a QWebEngineUrlRequestInterceptor that adds that header: … Read more
Yes you can do this with OSMnx: import osmnx as ox ox.config(use_cache=True, log_console=True) G = ox.graph_from_place(‘France’, network_type=”drive”, custom_filter=”[“highway”~”motorway”]”) fig, ax = ox.plot_graph(G) See also this answer if you’d like to filter by multiple highway tag values (e.g., retain all motorways AND primary roads). Finally, note that as of OSMnx v0.15.0, the gdf_from_place and gdf_from_places functions … Read more
The issue is the winding order of the coordinates (see this block). Most tools/utilities/libraries/validators don’t really care about winding order because they treat geoJSON as containing Cartesian coordinates. Not so with D3 – D3 uses ellipsoidal math – benefits of this is include being able to cross the antimeridian easily and being able to select … Read more