Thread: Creating my own JNX map for Etrex 20

Thanks for that very useful Zoom table.

My first attempts to crop the map borders were done using the MAPC2MAPC tool, however this seems to require that the map image is a perfect rectangle.
The MAPC2MAPC tool uses only two points to define the crop boundary.
I have not found any way within MAPC2MAPC to crop an irregular trapezoidal shape.

In my Google Earth trial I have some joints where a "gap" of up to 3 pixels appears when viewed in GE.
Maybe my border cropping is not accurate?
My four reference points for calibrating the map are at the first grid intersection inside the map on each corner -- not the corners, since these are not at grid intersections (corners actually at Lat/Long intersections).

Multiple jnx files load ok in Etrex 20. I have a nice block of 6 maps (3x2) loaded up, covering the eastern half of the Annapurna region.