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post #1 of (permalink) Old 10-04-2006, 06:40 AM Thread Starter
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Default Latitude / Longitude Coordinate Converter

I haven't used a GPS much. The one I bought I took back after a few days. So I don't know much about them.
Then just recently I went on a hike with Chilliwack Jack and he let me borrow his GPS.
I took some way point readings and then tried to figure out where I went.
I went to this website:
http://ilmbwww.gov.bc.ca/bmgs/airphoto/IMF/Index.htm

On this site you can get GPS readings from it's map.

The trouble is that it gives readings in decimal and C'Jack's GPS gives readings in minutes.

I found math formulas online but they were tedius and my answers were way off base from the online map and the GPS, so I concluded that C'Jack's GPS was just way out and needed some kind of calibrating or something.

Then I found this website and everything started making sense.
http://www.cosports.com/tools/gps_coords.htm

In the bottom calculator for degrees and minutes I entered the coordinates from the waypoints I made with his GPS and from the answers I plotted them on the online map, (at top gov.bc), and was able to see quite accurately where I went.

Results:
GPS: (Min.) ======== Conversion: (Dec.) Tenths.
Paved Road
N 49'01.148 =========== 49'01.80
W 122'01.849 ========= 122'01.50

Parked Car
N 49'01.029 =========== 49'01.10
W 122'01.116 ========= 122'01.60

Trail Head
N 49'00.458 =========== 49'00.27
W 121'59.589 ========= 121'59.35

Vegie Hillside
N 49'00.172 =========== 49'00.10
W 121'59.254 ========= 121'59.15

First Subpeak
N 49'00.206 =========== 49'00.12
W 121'59.136 ========= 121'59.80

First Dip
N 49'00.219 =========== 49'00.13
W 121'59.012 ========= 121'59.00

Second Subpeak
N 49'00.223 =========== 49'00.13
W 121'58.976 ========= 121'58.58

Second Dip
N 49'00.174 =========== 49'00.10
W 121'58.866 ========= 121'58.51

Third Subpeak
N 49'00.099 =========== 49'oo.50
W 121'58.640 ========= 121'58.38

Third Dip
N 49'00.062 =========== 49'00.30
W 121'58.533 ========= 121'58.31

Fourth Peak (Isar)
N 49'00.097 =========== 49'00.50
W 121'58.302 ========= 121'58.18


Blue stars are the plotted way-points.

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Wildman

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post #2 of (permalink) Old 10-04-2006, 07:25 AM
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Good job, Wally...

And thanks for the conversion link and map...

I took it with me last weekend camping/hunting and it worked great !!! (It returned me to the same spot after a 3 hour trip on a loop trail... within 2 ft of where I started)...

It gets its coordinates from the satellites, so it gets exact info, without calibration...

Cheers...

C'Jack...

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post #3 of (permalink) Old 10-04-2006, 08:07 AM
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Wildman check the settings of your GPS. Somewhere in there you should be able to change between data formats.
My Garmin eTrex can go between HH DD MM.Mmmm to HH DD MM SS.Ss to UTM or just about any other co-ordinate type known to man!
This saves a lot of fiddling with converters or calculators. Simply input the data in whichever format you wish, then switch settings and the conversion is done for you!

Bas's site prints maps with UTM grid on them, and I often use those when I go hiking to places that I haven't been before (Liumchen, Tamihi) and with UTM it is VERY easy to pinpoint your location on a map!
The BC Basemap on the other hand lists coordinates in the Hh Mm Dd Ss type format. Other sites use Lat/Long...it seems confusing, but it isn't really!

OR....if you're sitting at your computer, trying to figure things out, you can use THIS little program!




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post #4 of (permalink) Old 10-04-2006, 08:25 AM
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Thanks Shadow...

I just learned something new... [8D]...

I can get into my Garmin 12 software and change the formats... there are 12 (twelve) formats available...

Cool...

C'Jack...

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...hang on, I'm coming...
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post #5 of (permalink) Old 10-04-2006, 01:05 PM Thread Starter
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Yes, thankyou TheShadow and thankyou C'Jack for the map link also.
Even though in heavy timber they take along time to get a reading, it's worth the time if you plan to do a return trip in the future. I was impressed and I think newer models may be faster. I think I will try and get me one of them thar gadgets.
Can you also input coordinates before you hike and follow those way-points to where you want to go?

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post #6 of (permalink) Old 10-04-2006, 02:13 PM
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Quote:
quote:Originally posted by Wildman

Can you also input coordinates before you hike and follow those way-points to where you want to go?
Hmmm... sounds too "technical" for me...
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post #7 of (permalink) Old 10-04-2006, 02:22 PM
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Quote:
quote:Originally posted by Wildman

Can you also input coordinates before you hike and follow those way-points to where you want to go?
Not only can you input waypoints...but TRACKS and ROUTES as well!

Last Spring, we were up in the Deadman Valley area and made our own rough bushwhack/route up the hillside to the rim-rock. After meandering around up there for an hour or two, we found the actual trail back down the hill!
So on the way down, I set my GPS to TRACK mode and recorded the trail into its memory...all the way back down the hill to within a few meters from where we had originally started! (Note to self: LEFT fork! )
When I got back home to the valley, I saved the TRACK to my hard-drive so the next time we go back, I can simply reload it back INTO the GPS and we'll be able to BACK-TRACK the trail from beginning to end!
I have several collections of waypoints and routes saved on HD or CD that I use for hiking, fishing, what-have-you.
Using the co-ordinates from the BC basemap, I have marked roads to destinations - noting which way to go when the road forks or intersects with another.

Neat gadgets...but it helps if you have a cable to hook up to your computer, otherwise you have to do it all by hand and that can take a LOOOOOONG time!

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post #8 of (permalink) Old 10-04-2006, 02:34 PM
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Shadow... I need a "study session" with you...
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post #9 of (permalink) Old 10-04-2006, 02:52 PM
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With an inexpensive subscription to Google earth Plus ($20)you can also upload your GPS tracks directly onto Google Earth.
It's very cool to then be able to retrace your route in 3D.
Alternately, if you use a program like OziExplorer or Memory Map, you can pre-plan your route on the topo maps, upload to your GPS & then upload again to Google Earth. This way you can also get a great idea of the vegetation cover and terrain (and even views) before your hike.
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post #10 of (permalink) Old 10-04-2006, 03:02 PM Thread Starter
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Quote:
quote:Originally posted by cfulker

With an inexpensive subscription to Google earth Plus ($20)you can also upload your GPS tracks directly onto Google Earth.
It's very cool to then be able to retrace your route in 3D.
Alternately, if you use a program like OziExplorer or Memory Map, you can pre-plan your route on the topo maps, upload to your GPS & then upload again to Google Earth. This way you can also get a great idea of the vegetation cover and terrain (and even views) before your hike.
Very cool. I read about it on the gear treads when searching about GPS's, but I thought that software was for a MAC. Is it available for a Windows platform OS too?

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post #11 of (permalink) Old 10-04-2006, 03:08 PM
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Quote:
quote:Originally posted by Chilliwack Jack

Shadow... I need a "study session" with you...
Well, I don't claim to be an expert on these things, but I get by for my own needs!
Bring it along on the next "group outing" so we can play and compare features!


But by the looks of things, I won't be getting any free weekends until mid-month.


Wildman, I have OziExplorer (for Windows) and it is a GREAT program (although it has quite a steep learning curve)! You can even calibrate your own maps!
What I will do is go to Bas' site and use his MEGA-MAP feature to create huge .jpgs of an area. Then, I'll go to the BC Basemap to get the co-ordinates of some of the landforms (peaks, road junctions etc.), then...I load the .jpg into OziExplorer and using those co-ordinates, I am able to calibrate it as a map!
Granted there is a margin of error but it is usually to within 15m or less.

From there, you can pick out waypoints or create routes or tracks...save to disk...you can even run it on a laptop (with your GPS connected) while you drive, like the TomTom thing they advertise on TV.



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post #12 of (permalink) Old 10-04-2006, 05:28 PM
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Wildman,

If you are looking for a GPS, Garmin currently has a $50 rebate offer good until Dec 31 on all eTrex cx models GPSMAP 60 models. Buy at GPS Central and you get a $20 off Topo Canada, which seems like a great product. You can download and upload maps to and from your GPS unit, and save your routes, waypoints, and tracks.

I just picked up a Legend Cx for my husband's birthday. Now he has to pry it out of my hands to play with it.
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post #13 of (permalink) Old 10-04-2006, 07:00 PM
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Here is a screen-cap of an actual OziExplorer map.



The waypoints (not in any particular order) are shown as the yellow, numbered points and the track is in red.
This just happens to be the track of our recent trip up Mt. McGuire.

Waypoint 1 is the sinkhole I nicknamed "Gollum's Cave".
Wpt 2 is where the vehicles were parked.
Wpt 3 is the trailhead.
Wpt 4 is the washout/sinkhole near the parking area.

I laid down the track on the way DOWN, since it is faster.
You can see the co-ordinates displayed in the white bar...shown as both DdMmSs.sss and UTM.





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post #14 of (permalink) Old 10-04-2006, 07:40 PM Thread Starter
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Wow, thanx for the info. All of you great stuff to know.
I wish I could run out and buy one right now. [8D]

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