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Federal Office of Topography swisstopo

LTOP / LTOPWIN

Pre-analysis and adjustment software for polygon networks, triangulation networks, combinations of GNSS observations and terrestrial measurements as well as leveling networks.

LTOPWIN

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

LTOPWIN is a practical and intuitive graphical user interface for the preparation of a LTOP adjustment. This program also offers an extensive help system to LTOP options and settings.

 

 

Latest version

LTOP 99.6.1 (03.03.2009) / LTOPWIN 97.4.7 (10.12.2003)

 

Restrictions of the trial version:

  • Unknown planim. points: 25
  • Unknown altim. points: 75
  • Number of stations: 100
  • Number of coordinates: 100
  • Number of measures: 250

 

LTOP:
Software system:Windows / DOS / Linux
Languages:German / French / English
 
LTOPWIN:
Software system:Windows
Languages:German / French
Remarkes:LTOP required
 

Product details

Input data

  • LTOP coordinate file
  • LTOP measurement file
  • Control file with the necessary control parameters

Output

  • LTOP file with adjusted coordinates
  • Printer-optimized protocol file, with all the details and results
  • IPL file for input in the PLANETZ software

Possibilities and properties

  • Horizontal and vertical adjustments are processed seperately (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, until 9 groups can be defined with individual unknowns of orientation, scale or offset
  • Several possible parameter estimations for the integration of GNSS observations
  • Strict treatment of accuracy and reliability parameters and necessary tests for the use in Swiss cadastral surveying

 

Other posibilities

  • Drawing of plans (position and/or height (software PLANETZ required)
  • Interactive help (LTOPWIN)

 

Screenshots

General parameters (LTOPWIN) (Enlargement in new window)Enlargement in new window
General parameters (LTOPWIN)
Horizontal adjustment (LTOPWIN) (Enlargement in new window)Enlargement in new window
Horizontal adjustment (LTOPWIN)
Vertical adjustment (LTOP) (Enlargement in new window)Enlargement in new window
Vertical adjustment (LTOP)
GPS parameters (LTOPWIN) (Enlargement in new window)Enlargement in new window
GPS parameters (LTOPWIN)
Comments about this page: Geodesy
Last updated: 01.05.2012

Contact

Dr. Urs Marti
Dipl. Ing. ETH
Geodetic Developments and Contracts

Tel +41 31 963 23 78
Fax +41 31 963 24 59

Email to Urs Marti

 

Further information

 

Documentation

Products

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