Issue with southern-zone.map: Missing maxspeed Tags for Offline Speed Limiter

General talk
1

Dear Support Team,

I hope this message finds you well.

I have downloaded the southern-zone.map file and am currently using it in my Android app with the Mapsforge library to extract offline road speed limits (maxspeed). However, during testing, I am consistently receiving the message:

:question: No OSM speed limit data found within 1000m radius

Despite using valid latitude and longitude coordinates on mapped roads, the lookup function returns no results, indicating that the .map file may not include maxspeed tags.

Could you please confirm:

  • Whether the southern-zone.map file contains any maxspeed or source:maxspeed tags?
  • If not, is there a version of the .map file that includes speed-related OSM tags?
  • Alternatively, can you suggest how to regenerate the .map file with those tags preserved (e.g., using osmosis or another recommended tool)?

This functionality is crucial for our offline speed limiter feature in a GPS tracking Android application.

Looking forward to your response.

2

Can you please tell us where you downloaded it from?

2 Likes
3

In addition to Jarek’s question, have you cross-checked one of the coordinates you have used against our map data (accessible e.g. through openstreetmap.org) to verify if OSM even has speed limit data there? For example, less than 1% of road elements in India have speed limit information in OSM, and if your offline speed limiter feature depends on every road having a speed limit then you’re probably in trouble.

4 Likes