<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">aha. Definition of SCALED as it applies to VERTCON bench marks, and how a civilian GPS can help with those.</div><div class="gmail_default" style="font-family:georgia,serif">(Lots of other good advice too.)</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default"><span style="font-family:verdana,sans-serif"><a href="https://www.ngs.noaa.gov/surveys/mark-recovery/mark-descriptions-help.shtml" target="_blank">https://www.ngs.noaa.gov/surveys/mark-recovery/mark-descriptions-help.shtml</a></span></div><div class="gmail_default" style="font-family:georgia,serif"><div style="margin-left:40px"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><span style="font-family:verdana,sans-serif"></span><br></div><b><span style="font-family:verdana,sans-serif">Mark Position</span></b><br><span style="font-family:verdana,sans-serif">Many older bench marks were positioned using only scaled map coordinates. If you have a more accurate position, please report it. Acceptable positions to supersede SCALED come from the following sources:</span><br><span style="font-family:verdana,sans-serif"></span><br><span style="font-family:verdana,sans-serif">    ±10 m = "<b>handheld 2</b>" consumer-grade GPS with or without WAAS correction.</span><br><span style="font-family:verdana,sans-serif">     </span><br><span style="font-family:verdana,sans-serif">    ±  3 m = "handheld 1" engineer-grade GPS with differential or kinematic correction in NAD 83.</span><br><span style="font-family:verdana,sans-serif">     </span><br><span style="font-family:verdana,sans-serif">    ADJUSTED = A least squares adjustment of geodetic survey project data</span><br></blockquote></div><blockquote><div style="margin-left:40px"><span style="font-family:verdana,sans-serif"></span></div></blockquote></div></div>