This is a step-by-step tutorial how to identify, download, geo-reference, convert and use Survey of India maps for exploration using offline mobile navigation.
Step 1 – Identify survey map sheet nr
https://www.indigeo.com/iMap.html#10/32.6937/78.0442
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-1024x714.png)
Step 2 – Download survey map
https://onlinemaps.surveyofindia.gov.in/FreeMapSpecification.aspx
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-1-1024x610.png)
Step 3 – Convert to JPG
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-2-1024x610.png)
Step 4 – Clip the borders
Microsoft Paint
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-3-1024x686.png)
Step 5 – Geo-ref map + export as MBTiles
https://www.maptiler.com/
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-4-1024x668.png)
Check the right latitude, longitude coordinates mentioned at the corners of the original Survey map
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-5-1024x668.png)
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-6-1024x668.png)
Step 6 – Convert to SQLite format
Download:
https://github.com/tarwirdur/mbtiles2osmand
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-8.png)
Run:
python3 mbtiles2osmand.py 47F_6_clip.mbtiles 47F_6_clip.sqlitedb
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-7.png)
Step 7 – Load in OSMAnd
Download the SQLitedb file in your phone and set as Overlay map in OSMAnd
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-9-698x1024.png)
![](https://ultrajourneys.org/wp-content/uploads/2021/08/image-10-461x1024.png)
Congratulations! You are now ready to explore the region using offline Survey of India maps on your mobile phone