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Using the UTM coordinate system
- Larry_Trotter
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19 years 9 months ago #175259
by Larry_Trotter
Using the UTM coordinate system was created by Larry_Trotter
I don't know... this might be common knowledge for all you hardcore, backcountry types who have moss growing up north side of your legs. But I have finally discovered the UTM coordinate system and how great it is for finding one's position on a map.
Bascally, UTM takes the map and flattens it out locally into a metric grid. I have a simple Garmin eTrex GPS and have been tempted to get a more expensive gps with mapping. However, I find that I can put the eTrex into UTM mode. Then I can use Topo! to print out a map of the area I am hiking in with 100 meter UTM grid lines. Between the gps read out and the map grid, I can see exactly where I am on the map, even inside a 100 meter square, say within a couple hundred feet. It seems easier than extrapolating degrees and minutes.
On snow, with no trails, it is cool to find my position on the map and see that I am only 200 meters away from the lake or other landmark I am looking for, over the hill and through trees where I can't see it.
Yup, the old eTrex will do just fine for now.
Bascally, UTM takes the map and flattens it out locally into a metric grid. I have a simple Garmin eTrex GPS and have been tempted to get a more expensive gps with mapping. However, I find that I can put the eTrex into UTM mode. Then I can use Topo! to print out a map of the area I am hiking in with 100 meter UTM grid lines. Between the gps read out and the map grid, I can see exactly where I am on the map, even inside a 100 meter square, say within a couple hundred feet. It seems easier than extrapolating degrees and minutes.
On snow, with no trails, it is cool to find my position on the map and see that I am only 200 meters away from the lake or other landmark I am looking for, over the hill and through trees where I can't see it.
Yup, the old eTrex will do just fine for now.
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- Marco
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19 years 9 months ago #175260
by Marco
Replied by Marco on topic Re: Using the UTM coordinate system
My approach as well is to simply use a map printed out from TOPO! with a UTM grid, and then bring a small and light GPS receiver for coordinates as needed. In practice I rarely need to take out the GPS, and basically leave it off unless there's any uncertainty concerning our position or if I want to record a waypoint for future reference. If needed it takes just a moment to turn on the GPS, get the UTM coordinates, and readily interpolate our position on the UTM grid map.
I presently use a Gecko 301 that provides only coordinates and no mapping. Its so small and light that its never any issue to bring it along, and the batteries last a long time because I rarely need to turn it on. Its nice insurance to fall back to if we lose visibility or want confirmation of our location. I also prefer seeing my location referenced on a reasonably sized physical map than on a small LCD screen. Rather than upgrading in the future to anything bigger that includes mapping, I'll probably someday go with something even smaller and lighter, perhaps combined with a watch as long as the battery life were reasonable.
I'm sure, however, that there are many power GPS users out there that benefit from a more full featured unit...
Cheers,
Marco
I presently use a Gecko 301 that provides only coordinates and no mapping. Its so small and light that its never any issue to bring it along, and the batteries last a long time because I rarely need to turn it on. Its nice insurance to fall back to if we lose visibility or want confirmation of our location. I also prefer seeing my location referenced on a reasonably sized physical map than on a small LCD screen. Rather than upgrading in the future to anything bigger that includes mapping, I'll probably someday go with something even smaller and lighter, perhaps combined with a watch as long as the battery life were reasonable.
I'm sure, however, that there are many power GPS users out there that benefit from a more full featured unit...
Cheers,
Marco
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