ControlPoint Survey
Least squares adjustment for control networks

From raw field data to a network you can sign off.

Total station, levelling, tape drops and GNSS in one rigorous adjustment. It runs in your browser, finds the field mistakes before you adjust, and gives you a report your client can read.

Log in In testing. Access is by invitation.
4 2004 3004 4002 7002 600 2515 WORKSQuarry LaneMill RoadBrook C1C2C3C4C5C6F1 N050100 m
─── observed line - - - side shot △ control station ◯ 95 % ellipse Made-up network and map, for illustration.
1
Import
Drop in the instrument's own files. Nothing is joined or renamed behind your back.
2
AUTO
The software links every setup by its measurements and lists what looks wrong. You tick what to accept.
3
Adjust
Hold your control, weighted as you choose, and run one adjustment over everything.
4
Report
A short report in plain words, the full listing, and the plot on your drawing.

What goes in

The files your instruments and office already produce.

  • Leica total station jobs (DBX)
  • Digital level files (GSI and XML)
  • GNSS observations (RINEX 2, 3 and 4)
  • Tape drop bookings and level books
  • StarNet data files and listings
  • Control from PDF, Excel, Word or CSV
  • DXF drawings as a background

What it does

The checking a careful surveyor does, done first and shown to you.

  • Finds wrong point names, blunders and mis-booked heights before the adjustment
  • Adjusts angles, distances, levels, tape drops and GNSS vectors together
  • Traces every residual back to its line in your data
  • Tests the result (chi-squared) and says what it means in words
  • Works on national grids, your own site grid, or a local one

What comes out

Results you can hand over, and files other software can read.

  • A short report: worst first, with how to improve the network
  • The full listing, with error ellipses at 95 %
  • Network plots to PDF and DXF, at scale
  • Coordinates as CSV or GSI
  • A StarNet data file of the same job
  • A comparison with your last run

Your data file is the whole truth.

Every observation is a line of text you can read, edit or switch off. Whatever AUTO changes, it writes there, where you can see it and undo it.

The adjustment runs on your own computer, in the browser. There is nothing to install.

C  P1   1000.000  5000.000  25.000  ! ! !
C  P2   1058.710  4999.180  25.012

DB S1
DM P1   0-00-00.0    48.2134   90-12-08  1.552/1.500
DM P2   83-41-17.5   61.0972   89-58-41  1.552/1.500
# DM T3  201-10-44.0  12.4410  91-02-15   ' switched off by AUTO: 31 mm off its repeats
DE

L  BM1-BM2   +0.31236   178.2