Hello,
I’ve been running Graphhopper locally on a PC for the past few months now to generate routes for an electric vehicle across the US. Currently, I’m in need of stronger elevation data for calculating accurate slopes along post processed segments. Some segments can end up relatively short, which I believe is why I’m calculating unrealistic slopes in some areas. From my understanding, the CGIAR provider is 90x90m and I’m trying to utilize more precise data, at 30x30m. I also wanted to eventually try out LIDAR data (though that may be overkill).
I’ve found what looks to be an excellent source at https://portal.opentopography.org/raster?opentopoID=OTSRTM.082015.4326.1.
I’m curious if the community may be able to chime in with some tips how to configure my server to use this higher resolution data, specifically for the Map-Matching function.
graph.elevation.provider: cgiar
graph.elevation.cache_dir: ./demprovider/
graph.elevation.edge_smoothing: ramer
Here’s what I currently have, and it seems if I redirect the source or cache correctly using SRTM as my provider, everything should run smoothly.