Walk Through a GNSS Survey

Lets walk all the way through a survey in TPC

The objective is simple – walk through the steps to produce a finished survey and send if off for billing.  You’ll use many of these steps for just about any survey you do.

  • we use GNSS for this one, but other walk throughs use a total station
  • each step has a short video – some are a little longer
  • see how TPC does common tasks like recalling points

We’ve selected a simple GNSS survey where we want to find and mark the property corners and set a few points on line so the owner can build a dog fence.

We chose this example because it’s simple to understand, letting us focus instead, on some of TPC’s key concepts.


  • find and mark existing lot corners
  • set points on line so owner can build a dog fence
  • est. $500 to $700 depending on field time
Walk Through GNSS – Intro (1:51)


  • tax lot number – county assessors online
  • surveys – county surveyors online
  • address – Google maps
  • terrain – Google earth
  • confirm work with client
Walk Through GNSS – Research (3:20)

Record Data / Corners

  • enter entire block to get record locations for all lot 19 corners
  • use space bar to repeat direction
  • edit traverse as needed until it closes – find and fix data entry mistakes
Walk Through GNSS – Record Data / Corners (12:11)

Corner Search / Ties

  • talk with neighbors and start with adjacent lot
  • North side pins – several disturbed
  • East side pins
  • South pins – GNSS issues under canopy


Walk Through GNSS – Corner Search / Ties (8:46)

Survey Calibration

  • fixed vs float positions and RMS
  • calibrate record data from local to GNSS
  • check found corners with stakeout report


Walk Through GNSS – Survey Calibration (7:25)

Survey Decisions

  • do found corners match record data
  • use found corners for property lines
Walk Through GNSS – Survey Decisions (4:07)

Export Lines via DXF

  • emlid flow needs line to stakeout points on line but can’t create the lines
  • so TPC exports the lines to emlid via DXF
Walk Through GNSS – Export Lines via DXF (5:06)

Settings Points on Line

  • export lines to emlid flow
  • staking points on line with emlid flow
Walk Through GNSS – Setting Points on Line (3:15)
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