I like exploring open GIS data. Many countries (for example Switzerland, Norway, the US) publish free map data. Unfortunately, map data is almost always in some custom, country specific format. So it became quite a hobby of myself trying to get GIS data on my GPS devices. This worked quite well for vector data for Garmin (thanks to the excellent mkgmap and a little bit of coding) but is frustrating for raster data. There is also always the danger that one day Garmin decides to lock down their devices further rendering my work useless.
Looking at the cross manual I can see that IMP, KML, KMZ, MPVF, RMAP, RTMAP, VMAP are supported. Except for KML and KMZ (which are no high performance formats) none of these formats ring a bell. I don't think they are open or specified anywhere.
Land Pro seems to be able to read more common formats like SHP and TIF and create maps form it, but I could not find any specifications HOW it does that. (Like which SHP properties map to which map properties...how to specify roads/trails/....?).
So overall it looks like twonav spent some effort, but might be lacking the community behind garmin devices that creates tools and reverse engineers formats, but I'd like to hear other people's opinions.
Is the TwoNav ecosystem more open to importing custom vector and raster data?
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