Converted network does not have a correspondence with the basemap

[temospena]

Hi, First of all, thanks for this great script!

I was using this to convert an .osm file (exported directly from OSM web site) to VISSIM, for an intersection in Lisbon, Portugal.

I noticed that the resulted vissim network falls about -1km (X) and 4km (Y) aside where it was supposed to be located. I wonder why is that...

Here is an example, of where it "lands"

and where it was supposed to be:

I was looking at your code with @gmatosferreira and wonder if it comes from the conversion of CRS. So we tried to use a python library (from pyproj import Transformer) to deal directly with CRS transform, but the results were exactly the same, doesn't change anything.

We further investigated if this was a basemap error, but the misplace is exactly the same using photo Bing, OSM tiles, of PTV tiles.

Also, we tried to convert from an example closer to the 0,0 CRS, to check how the error would behave. And so, from an intersection in São Tomé, near the Equator (about 0.3 lat), it still is misplaced, but this time with only about 0.8 km (X) and 0.04 km (Y)

Do you have any clue of what is happening here, and how to overcome that?

Sys info: I am using VISSIM 2024 and Python 3.12. Here are the OSM files used in both cases osm_files.zip

Thanks in advance

[temospena]

Would it have anything to do with this? https://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/

[temospena]

Just an update, maybe that can help to understand the problem:

I created a polygon with the footprint of the building in QGIS, using the OSM basemap. Exported in .shp using CRS 4326. Imported this file directly in VISSIM, and i wend directly to the right place.

But... The coordinates of the lower left point of this polygon showing in QGIS are not the same as in VISSIM. In QGIS:

In VISSIM:

Where these coordinates are in VISSIM (near my misplaced network converted with this py script):