I am trying to understand the mysteries of Garmin feature codes. I am guided
by the list that is in the cGPSmapper manual plus other sources, some of which
have quite obscure codes, in creating my personal .typ file that I use in
conjunction with mkgmap. Such codes are necessary in order to obtain greater
variation in representation of, say, various land use features. Yet I cannot
ascertain whether these codes are recognised by my Legend HCx until I upload
the resultant gmapsupp.img, and often they are not recognised. Does this
depend upon the individual GPS device or its firmware? Does anyone know of
custom codes, particularly for polygons and polylines, that are usually
recognised by Garmin devices?
Bob Hawkins
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