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pfoser / mapconstruction

Map Construction Algorithms
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Unknow reference system for GPS data #2

Open RamiNaim opened 4 years ago

RamiNaim commented 4 years ago

Good day! I am trying out Ahmed's algorithm using example data from your repository and some other data from other sources. However, I cannot identify which spatial reference system is used in, for example, tracks in Athens example. Due to it, I cannot visualize it correctly. I have also tried the algorithm on GPS data from Saint Petersburg, converted into UTM 35N reference system. But then I try to visualize resulted graph in the same reference system, it is hugely misplaced.
Could you please give me some insight on which SRID I should use in order to get valid road graph?

johannes-holz commented 3 months ago

I did not look into the algorithms, but for anyone like me who wants to use the data and needs the coordinate reference systems, it looks like they are:

crss = { "berlin": "EPSG:32633", # WGS 84 / UTM zone 33N "athen": "EPSG:2100", # GGRS87 / Greek Grid "chicago": "EPSG:26716", # NAD27 / UTM zone 16N }