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You have to make or get the maps from somewhere if you want the GPS positions associated to a position on a map. I don't do any of this stuff myself, but I have played with software that will let you take most any image you want and scale it and calibrate it to match actual lat/long coordinates. Then the result could be used with GPS data to show a position or track using that image. The image could be a raster chart, an aerial/satellite image, or even a drawing that you scanned as saved as an image. The only key thing is you needed to be able to identify coordinates on several points of that image so the software could associate it with the lat/long datum you choose to use.
Most recreational GPS's come with a map, but I'd think their accuacy not suitable for what it sounds like you want. Especially in buildings or under roofs.
You might google "spot gps" and look at what they do with consumer grade trackers and get some ideas.
It's always possible to make it work. However there are probably better tracking methods than gps for indoor or semi indoor stuff.
IMO, with GPS it wouldn't be cheap as you'd need some equipment to augment the normal satellite signals.
What kind of horizontal resolution are you wanting? The everyday "recreational" GPS is only accurate from 3 to 11 meters in ideal conditions.
Can't make heads or tails of what you are asking in the last question.
Yeah, the little badges and stuff are hokey to me also, but as this is likely software that was 'bought off the shelf', we are likely stuck with that. Personnally I've always liked forums that use phpBB, but I'm sure we'll get used to this one just like we did the previous two.
Great reading guys. And I think the info newbie GPS users should take from this is that recreational GPS's should not be used locating your boundaries. Certainly it's okay if all you want is a "there about" idea. But if it might get you into a legal dispute with a neighbor because you cut down his trees or such... you definitely should think twice, maybe three times about it.
I would think the likely culprit is a dirty or messed up contact on the male or female side of the usb connector. I believe there is a resistor between a couple of the usb pins in the cable, and that might fail, but if the cables undamaged, I'd think that unlikely. Voltage on the power-point/cigarette lighter of the vehicle might be an issue, but that's easy enough to check but also unlikely IMO.