Subject: Re: [BoundaryPoint] Topozone Discrepancies<br/>
Date: May 15, 2001 @ 18:00<br/>
Author: Bill Hanrahan (Bill Hanrahan &lt;hanrahan@...&gt;)<br/>
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<div id="ygrps-yiv-1294084569">Thanks Bryan.  It will be interesting to see what their response will<br/>
be.  I&#39;ve also been relying on Topozone on the job...<br/>
<br/>
Bill<br/>
<br/>
<a rel="nofollow" target="_blank" href="mailto:bjbutler@...">bjbutler@...</a> wrote:<br/>
<br/>
<blockquote><span title="ireply"> &gt; Anyone using www.topozone.com to acquire GPS coordinates should be<br/>
&gt; aware that they are using a mixture of NAD27 and NAD83 UTM<br/>
&gt; coordinates, but there is no way to tell which is which.  They<br/>
&gt; believe all coordinates are NAD27.  However, last week I relied on<br/>
&gt; this misinformation during a bushwhack from the Delaware Arc monument<br/>
&gt; to the Delaware - Maryland - Pennsylvania tri-point and ended up in a<br/>
&gt; hay field 200 meters north of the tri-state monument.  Using the same<br/>
&gt; target coordinates, but interpreting them using the NAD83 datum<br/>
&gt; yields the correct result.<br/>
&gt;<br/>
&gt; I have contacted topozone about this problem.<br/>
&gt;<br/>
&gt; Regards,<br/>
&gt; BJB<br/>
&gt;<br/>
&gt;<br/>
&gt;                    Yahoo! Groups Sponsor<br/>
 </span></blockquote>  [www.debticated.com]<br/>
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