NGEE Seward Survey Notes
Revision as of 21:06, 22 November 2017 by 137.229.92.213 (talk)
2017 Additions
- March 28 2017 - confirmed in fieldbook, pg 1 of bob busey ngee 2017 snow surveys (UAF Trimble R8)
- Rover at 1.219m to bottom of antenna mount
- Base at 1.435m to antenna phase center (137cm to OPUS ARP))
- March 27 2017 - 4/14/2017
- Teller top GCP 127cm nail to bumper (121.5cm to OPUS ARP)
- On the 4/21/2016 to 5/2/2016 trip RTK corrections were supplied from a point measured on the first trip that wasn't surveyed properly. So, make note if a transformation has been applied... perhaps I will include the points on this page or a link to the corrections.
- kind of wanted to get a placeholder here for things to forget about.
- I guess I can also add for the purposes of the second trip the base was treated as here in the original data:
Point ID Northing Easting Height tlrbcp02 7178309.855 454856.459 83.358
- Running raw gps data through Opus results in the site moving to:
Point ID Northing Easting Height tlrbcp02--OPUS 7178293.021 454866.017 75.523
- On the first trip there were three bases (at the moment positions listed here are uncorrected from OPUS :
Point ID Northing Easting Height telsnw2 7178275.291 455045.841 85.667 [Initial base... dug down 1m or so into a snow drift... not suitable for permanent] nrtel8bs 7180048.627 454031.405 261.143 [Top line base... turns out could only access the GP1-2 line, GP7-11 line, and most of the GP17-21 line] ... moved base to tlrbcp01 after telemetry problems tlrbcp01 7178216.425 454700.166 88.422 [Located on the bottom of watershed, 3 foot screed stake in ground here], used after base repositioned to bottom of hill for Bob, Cathy, and Lily measurements
1 ) export points from trimble biz center as csv
2 ) organize points for layout & naming convention as is done in google sheet
3 ) convert geopdf to geotiff in arc
4 ) Compare OPUS position to position used in snow melt survey
5 ) compute difference
6 ) apply difference to points using rtk for snow melt survey (just x & y for now)
7 )
Adjust a point using output from OPUS: http://geoline.com/wp-content/uploads/2014/01/TechTalk_TBC_Workflow_OPUS_.xml-files.pdf
- Could we use the XYZ data to better constrain the creek position?
