Retracement Inc. http://www.retracement.net field data collection for licensed surveyors Sun, 20 Jun 2010 22:24:16 +0000 http://wordpress.org/?v=2.7.1 en hourly 1 Morning Recon Hike http://www.retracement.net/morning-recon-hike/ http://www.retracement.net/morning-recon-hike/#comments Tue, 07 Apr 2009 21:51:15 +0000 admin http://www.eeph.com/~james/retracement-net/?p=42 A fine morning of hiking.  Got to try out the japanese “hori hori” garden knife digging out this monument.

Greta with monument

Greta with monument

]]> http://www.retracement.net/morning-recon-hike/feed/ Measure Twice Cut Once http://www.retracement.net/measure-twice-cut-once/ http://www.retracement.net/measure-twice-cut-once/#comments Sun, 29 Mar 2009 05:51:58 +0000 admin http://www.eeph.com/~james/retracement-net/?p=22 I spent the last couple of days testing some static GPS occupations that were tied together with terrestrial measurements (direction sets for horizontal, precise trig leveling for vertical). The point of it all was to compare results from OPUS-RS with results from static post-processing base station data from our own Washington State Reference Network. I had 5 OPUS-RS positions tied to 4 WSRN-derived positions, all roughly an hour of occupation. When you tie it all together in Star*Net the WSRN positions have roughly half the error ellipse of the OPUS-RS positions. The truer test will be when I compare the recent occupations directly, having sent the RINEX files to OPUS-RS as well as having processed them against WSRN base station data with Topcon Tools.  Will post that soon.

]]> http://www.retracement.net/measure-twice-cut-once/feed/ Survey Crew Ahead http://www.retracement.net/survey-crew-ahead/ http://www.retracement.net/survey-crew-ahead/#comments Sun, 29 Mar 2009 01:48:23 +0000 admin http://www.eeph.com/~james/retracement-net/?p=1 Here you will find various musings about survey field data collection — total station work, GPS work, digging up evidence, looking for bearing trees, etc.

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