I am trying to make a small marine chart for a friend's Garmin Chartplotter (I don't have one myself).

This is the command line :

java -jar mkgmap.jar --gmapsupp --family-id=7499 --overview-mapname=ReefMap --custom --series-name=ReefMap --index --location-autofill=is_in,nearest --input-file="E:\sheahan\77776666.mp"

Although visible in Basecamp and Homeport the device says "The Map Format is not supported"

Is it a matter of changing options in MKGMap or is my mission impossible?

John Thorn

ps the Polygon Types are just a random selection - finding what colours are available is the next phase.