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LTOP

LTOP allows pre-analysis and compensation of polygon networks, triangulation networks, combinations of GNSS observations and terrestrial measurements as well as levelling networks.

LTOP

Pre-analysis and adjustment software for geodetic networks

LTOP offers several computing facilities and indicators in order to optimise the compensation and detect errors or inaccuracies. The observations can be adjusted by the smallest squares or the robust method.

Possibilities and properties

  • Horizontal and vertical adjustments are processed separately (2D+1D)
  • Free adjustment, coordinates of the connection points as observations or constraint adjustment
  • Calculations based on projected or ellipsoidal coordinates
  • For directions, azimuths and distances, up to 9 groups can be defined with individual unknowns of orientation, scale or offset
  • Several possible parameter calculations for the integration of GNSS observations
  • Strict treatment of accuracy and reliability parameters and required tests for use in the Swiss cadastral survey
  • Graphic depiction of surveying network plans and results of network compensation (planimetry and/or altimetry; PLANETZ software is required)
     

Additional information

Documents & Publications

Images

GPS parameters (LTOPWIN)
GPS parameters (LTOPWIN)

Horizontal adjustment (LTOPWIN)
Horizontal adjustment (LTOPWIN)

Vertical adjustment (LTOP)
Vertical adjustment (LTOP)

General parameters (LTOPWIN)
General parameters (LTOPWIN)


Download applications

LTOP
Full installation package - Version 99.6 für Windows (Linux version on request)

LTOPWIN
Practical and intuitive graphical user interface for the preparation of a LTOP adjustment - Version 97.4 for Windows

PLANETZ
Graphical representation of networks computed with LTOP - Version 2008.1 for Windows (Linux version on request)


Federal Office of Topography swisstopo Seftigenstrasse 264
P.O. Box
3084 Wabern
Tel.
+41 58 469 01 11

E-mail

Federal Office of Topography swisstopo

Seftigenstrasse 264
P.O. Box
3084 Wabern

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