Import various data (roads, pipes, water, terrain model, houses,zoning++)

[SigTill]

I want to be able to import:
- Roads
- Pipes
- Water
- Terrain Model
- Houses
- Zoning

Based on for instance GeoJSON (https://en.wikipedia.org/wiki/GeoJSON)

So for instance two roads will be in a file called roads.geojson and be like this:

{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {

},
"geometry": {
"type": "LineString",
"coordinates": [
[
12.575590610504,
55.675467047829
],
[
12.57306933403,
55.674468822542
],
[
12.572221755981,
55.673639973708
],
[
12.571213245392,
55.672907910133
],
[
12.567790746689,
55.671619202958
],
[
12.567511796951,
55.671498195409
]
]
}
},
{
"type": "Feature",
"properties": {

},
"geometry": {
"type": "LineString",
"coordinates": [
[
12.569249868393,
55.674977013144
],
[
12.572017908096,
55.673549222769
],
[
12.573637962341,
55.672756655621
],
[
12.573702335358,
55.672696153653
]
]
}
}
]
}




I have had a look at Cimtographer - but it only supports terrain and some simple OSM data(https://github.com/PropaneDragon/Cimtographer) -

Is there any one of you that might be able to write or describe how to write an import-plugin for Cities Skylines based on this spec? Thanks in advance.

Or if it is easier to write a savegame reader/writer instead?