However, we bought a 64SX model GPS to renew our devices. But when we transmit mapsource with this GPS, we can only receive traces. Waypoints not found, gives an error / no waypoints. Since we cannot get waypoints, we cannot do anything with this device. We would like to try all kinds of methods before we return.
I've called Garmin Customer Service, and they wanted me to georeference the .jpg via Google Earth, save it as a .kmz file, and then import it onto the GPS. Again, my GPS doesn't recognize .kmz files. I'm working with a GIS specialist, and we're both scratching our heads currently on how to do this.
The advantage of this toolbox (beside nothing necessary to install, free and a interesting python script) is that it honors the garmin built in restrictions. That are 1024x1024 Pixels and max 100 tiles in a kmz(some models can do more, but this is not documented but tested). Maybe that was why it did not work for you earlier.
Just put your topomap into arcmap and zoom to the extent needed. Start the tool from the toolbox (in the catalog where you downloaded it to) and put the 90 or something in the tilenumber. It will take quite long but will save a kmz that you copy into your CustomMaps folder (not sure about the garmin restrictions here about multiple custom maps and tile limit, so best try with only one kmz first). I think it depends on the area you are exporting what the outcome resoultion will look like (1 megapixel per tile times max. 100 tiles for your map). Used it this week to put a aerial image with some polygon overlays for a few hundred hectars onto a garmin. The resolution on the gps was as high as on the pc, so at least for not so large areas it is an option.
The Gaia GPS App is mapping and navigation software that is optimized for working with smart phones. This is especially true with the Apple iPhone, which is what I use. But more importantly, this software essentially makes our iPhone act like a handheld GPS unit.
My number one hesitation with over-reliance on the iPhone is the tendency for the phone to leak metadata and personally identifiable information (PII). Especially when combined with websites that would gladly take GPX uploads or sync with the phone, such information becomes subject to unscrupulous individuals able to pry into private data with devious intentions.
The next issue made the Gaia GPS map less useful when it came to analyzing track distances and elevation profiles, especially when there were long tracks that needed to be segmented. And having long tracks was real easy to do, especially if the phone had been recording for a long time because you forget to turn off the recording!
To truly preserve places like this and keep it from become trashed or tagged, there has to be a permit or paid entry system similar to how they do it in most of the rest of the world (especially in Europe). That way, visitors pay into the maintenance, enforcement, and infrastructure of these places while possibly pricing out those who would trash the place.
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