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<DIV>Hello jerry,</DIV>
<DIV>Thank you for that explanation. It was very helpful.</DIV>
<DIV> </DIV>
<DIV>Larry Hoodad Swearingen</DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
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<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=bcss@bresnan.net
href="mailto:bcss@bresnan.net">bcss@bresnan.net</A> </DIV>
<DIV><B>Sent:</B> Wednesday, January 22, 2014 4:54 PM</DIV>
<DIV><B>To:</B> <A title=larry.swearingen@frontier.com
href="mailto:larry.swearingen@frontier.com">'Larry Swearingen'</A> ; <A
title=tjamrog@me.com href="mailto:tjamrog@me.com">'Tjamrog08'</A> </DIV>
<DIV><B>Cc:</B> <A title=cdt-l@backcountry.net
href="mailto:cdt-l@backcountry.net">cdt-l@backcountry.net</A> </DIV>
<DIV><B>Subject:</B> RE: [Cdt-l] etrax 30 Question</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
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<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'>If
by “BLM Maps” you are referring to USGS topo maps you are correct, they don’t
match. The topo maps are all projected in North American Datum of 1927
(NAD27) and the BC waypoints are in World Geodetic System of 1984 (WGS84).
For most purposes, NAD83 (North American Datum of 1983) is almost identical to
WGS84. (NAD 83 is the USA’s implementation of WGS84) If you look at the
lower left corner of most of these maps it will tell you the difference in
position between NAD83 and NAD27. The wording is something like “To place on the
predicted North American Datum 1983 move the projection lines 4 meters north and
51 meters east as shown by the dashed corner ticks.”
<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'>The
important thing is to match the coordinates on the map you are using with the
settings in the GPS. To make the Bear Creek waypoints match the NAD 27
maps in your Etrex go to “setup”, “position format”, “Map Datum” and
change the setting to NAD 27 CONUS. Set the Position Format to UTM
UPS. Then the gps will work with the UTM grid on the older maps. (Remember
to switch it back for the BC maps.) <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'>The
reason the BC maps are in WGS84 is because it is the easier for users. The
native language of GPS receivers is WGS84, and they come set up in that datum
when they are purchased. The Mapbook maps are gridded in WGS84 to
facilitate this. <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'>best
wishes,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'>Jerry
Brown<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><A
href="mailto:bcss@bresnan.net"><SPAN
style="COLOR: blue">mailto:bcss@bresnan.net</SPAN></A><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><A
href="wlmailhtml:www.bearcreeksurvey.com"><SPAN
style="COLOR: blue">www.bearcreeksurvey.com</SPAN></A><o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri","sans-serif"; COLOR: #0d0d0d'><o:p></o:p></SPAN> </P>
<DIV>
<DIV
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<P class=MsoNormal><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"'>From:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"'>
cdt-l-bounces@backcountry.net [mailto:cdt-l-bounces@backcountry.net] <B>On
Behalf Of </B>Larry Swearingen<BR><B>Sent:</B> Wednesday, January 22, 2014 1:47
PM<BR><B>To:</B> Tjamrog08<BR><B>Cc:</B>
cdt-l@backcountry.net<BR><B>Subject:</B> Re: [Cdt-l] etrax 30
Question<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p></o:p> </P>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>I have been doing
that. When I do that I need to setup the gps for whatever
coordinate<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>system the map uses so
I’ve been practicing for that using my BLM maps and also the
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>Bear Creek maps.
I’ve been looking up the Coordinates to a known Bear Creek
WayPoint<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>after changing the
Coordinate System to that used on the BLM Maps and locating that
point<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>on the BLM Map.
BLM map coordinate system is not the same as those used on BC
Maps.<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>However the gps will
convert the way point coordinates to whatever you set it up
for.<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'> <o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>I agree though.
The middle of the Gila Wilderness is not the place to try and figure this
out<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>for the first
time. :>) I do hope to not get so far lost that I’m off a BLM
Map. That would be Lost !<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'> <o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>Larry<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>HooDad<o:p></o:p></SPAN></P></DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'> <o:p></o:p></SPAN></P></DIV>
<DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: whitesmoke"><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>From:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'> <A
title=tjamrog@me.com href="mailto:tjamrog@me.com">Tjamrog08</A>
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: whitesmoke"><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>Sent:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>
Wednesday, January 22, 2014 1:07 PM<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: whitesmoke"><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>To:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'> <A
title=larry.swearingen@frontier.com
href="mailto:larry.swearingen@frontier.com">Larry Swearingen</A>
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: whitesmoke"><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>Cc:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'> <A
title=frankgilliland@gmail.com href="mailto:frankgilliland@gmail.com">Frank
Gilliland</A> ; <A title=cdt-l@backcountry.net
href="mailto:cdt-l@backcountry.net">cdt-l@backcountry.net</A>
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal style="BACKGROUND: whitesmoke"><B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'>Subject:</SPAN></B><SPAN
style='FONT-SIZE: 10pt; FONT-FAMILY: "Tahoma","sans-serif"; COLOR: black'> Re:
[Cdt-l] etrax 30 Question<o:p></o:p></SPAN></P></DIV></DIV></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'> <o:p></o:p></SPAN></P></DIV></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>You got it,
HooDad. <o:p></o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>Not covered in GPS
manuals is<U> being sure to align the settings on your GPS with whatever
physical maps coordinate format it has along the margins</U>. You often need to
do a little decimal estimation, as the points along the margins are marked in
only three or four places. <o:p></o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>I was using
Jerry Brown's maps, and it took a bit of for me to be able to (1) establish a
GPS reading where I as at and then (2) relate that to the physical map.
I'd practice this before I went. <o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>It saved my ass twice
when I was so far off the CDT that I was off of the narrow corridor on the
map. What you do is hit Your exact "lost" location on the GPS, then
orient the map magnetically, and then see just how far off and in what direction
you'd have to travel ( usually bushwhack) back to get to the CDT.
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>You must know how to
do this, and you might not be calm enough to figure it out the process if
you start to panic wandering around out there.<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>Yes, practice.
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>I would also practice
at home navigating to a single waypoint. <o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'> <o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>Uncle Tom
<o:p></o:p></SPAN></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>
<o:p></o:p></SPAN></P>
<DIV>
<DIV>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Calibri","sans-serif"; COLOR: black'>.<o:p></o:p></SPAN></P></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></BODY></HTML>