Question about Road Centerline CRS and Extraction via Python Bindings

Hello,

First of all, I want to thank you for this amazing project — it’s been a great tool to work with.

I’m currently trying to extract the centerlines of roads generated by the project, which also produces lane and road polygons. I’m using the Python bindings to access the data generated by the core (written in Rust). However, since I don’t have full access to the original Rust classes, I’m limited in how I can extract the centerlines properly.

Right now, the best I can access from Python is the result of network.to_json(), which returns a dictionary containing the centerline data, for example:
```
"center_line": {
"pts": [
{"x": 4998937, "y": 5077561},
{"x": 5078196, "y": 5070822},
{"x": 5254235, "y": 5091648},
],
"length": 256812,
}
```
Unfortunately, I haven’t been able to determine which Coordinate Reference System (CRS) these points use — they’re clearly not in EPSG:4326 (latitude/longitude).

Could you please clarify which CRS or projection these coordinates correspond to?
That would help me correctly transform and use them in my workflow.

Thank you again for your great work on this project.