1. Topozone Discrepancies
    Anyone using www.topozone.com to acquire GPS coordinates should be aware that they are using a mixture of NAD27 and NAD83 UTM coordinates, but there is no way
    May 15, 2001 @ 14:15 - bjbutler@bjbsoftware.com (bjbutler@...)
  2. Re: [BoundaryPoint] Topozone Discrepancies
    cool this is almost exactly the difference between jacks & my njnyus coords since i used topozone only to measure distances but usgs source materials to pin
    May 15, 2001 @ 14:44 - michael donner (michael donner <m@...>)
  3. Re: [BoundaryPoint] Topozone Discrepancies
    Thanks Bryan. It will be interesting to see what their response will be. I ve also been relying on Topozone on the job... Bill ... [www.debticated.com]
    May 15, 2001 @ 18:00 - Bill Hanrahan (Bill Hanrahan <hanrahan@...>)
  4. Re: Topozone Discrepancies
    There is more to this problem - a 200 meter discrepancy is too large to be accounted for by a change from NAD27 to NAD83 alone. Also, the problem seems to be
    May 15, 2001 @ 18:17 - bjbutler@bjbsoftware.com (bjbutler@...)
  5. Re: Topozone Discrepancies
    See message 2444, but basically I think you will be OK if you use only the geocoordinates and not the UTM coordinates displayed by topozone. BJB ... will ...
    May 15, 2001 @ 18:19 - bjbutler@bjbsoftware.com (bjbutler@...)
  6. Re: [BoundaryPoint] Re: Topozone Discrepancies
    Good to hear...in most cases (depending on terrain) resolution to the nearest second generally suffices for me anyway. Bill ... [www.debticated.com]
    May 15, 2001 @ 21:35 - Bill Hanrahan (Bill Hanrahan <hanrahan@...>)
  7. Re: Topozone Discrepancies
    Since you are in Florida, I have to ask - what terrain? BJB ... the ... should be ... relied on ... up ... the ... datum ... Service.
    May 15, 2001 @ 21:42 - bjbutler@bjbsoftware.com (bjbutler@...)
  8. Re: Topozone Discrepancies
    This whole coordinate issue may turn out to be a problem with my [older unit] GPS. I ll let you know. BJB ... the ... should be ... relied on ... up ... the
    May 15, 2001 @ 21:43 - bjbutler@bjbsoftware.com (bjbutler@...)
  9. Re: [BoundaryPoint] Re: Topozone Discrepancies
    hey we climbed lake okeechobee didnt we http://home.wanadoo.nl/~eefberns/gp-frsp400-achterkant.jpg was the actual background as i recall isnt that right bill
    May 15, 2001 @ 22:29 - michael donner (michael donner <m@...>)
  10. Re: Topozone Discrepancies
    Ah, yes. I see you rely on the most recent USGS maps. BJB ... use ... by ... response ... They ... Arc ... ended ... Using ... 6166:N/A=55 ... Yahoo! ...
    May 16, 2001 @ 00:34 - bjbutler@bjbsoftware.com (bjbutler@...)
  11. Re: [BoundaryPoint] Re: Topozone Discrepancies
    Terrain in Florida is suprisingly varied, but it s a matter of scale. Compare the rolling horse farms in the Ocala area with the Everglades or the Kissimmee
    May 16, 2001 @ 01:09 - Bill Hanrahan (Bill Hanrahan <hanrahan@...>)