You have to wait but a map file will be in your download folder You open Open Street Map, you center the area of the screen on your sector of interest and you click on EXPORT / API OVERPASS. Regarding the use or exploitation of this data, with land it is quite simple. So concerning the update of this data you can do it either directly on the Open Street Map site or with the JOSM tool In fact it's quite simple, "open" GIS data is mostly taken from Open Street Map. Is the TwoNav ecosystem more open to importing custom vector and raster data? 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. (Like which SHP properties map to which map properties.how to specify roads/trails/.?). 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. I don't think they are open or specified anywhere. Except for KML and KMZ (which are no high performance formats) none of these formats ring a bell. Looking at the cross manual I can see that IMP, KML, KMZ, MPVF, RMAP, RTMAP, VMAP are supported. ![]() There is also always the danger that one day Garmin decides to lock down their devices further rendering my work useless. 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. So it became quite a hobby of myself trying to get GIS data on my GPS devices. Unfortunately, map data is almost always in some custom, country specific format. Many countries (for example Switzerland, Norway, the US) publish free map data.
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