OkMap Tutorial - Creating a Garmin Custom Map
Published on April 15, 2026 - 3 minute read
OkMap tutorial for creating a Garmin Custom Map (KMZ) from a georeferenced raster map.
Recommended prerequisite
To better understand this tutorial, we recommend watching first:
Procedure:
- Load the map to be converted into a Garmin Custom Map
- Adjust zoom level and area of interest
- Open the Map Management - Map Tiling menu
- Set output to Garmin Custom Map (KMZ)
- Check format (JPG) and quality
- Verify the number of generated tiles
- Remove unwanted tiles (CTRL + left click)
- Save as KMZ file
- Check the map in Google Earth
Tips:
- Check Garmin device limits (maximum number of tiles and file size)
- Remove legend tiles or unnecessary tiles
- Keep JPG quality between 80% and 90%
- Reduce resizing factor if too many tiles are generated
Common errors:
- Using too low JPG quality (< 75%)
- Exceeding device tile limits
- Creating tiles that are too large (e.g. > 1024 px)
- Not verifying the final result in Google Earth