slide introduction to “bkhcm” software for adjustment, accuracy assessment and design surveying networks

14th CONFERENCE ON SCIENCE AND TECHNOLOGYLoc Dao Department of Geomatics Engineering INTRODUCTION TO “BKHCM” SOFTWARE FOR ADJUSTMENT, ACCURACY ASSESSMENT AND DESIGN SURVEYING NETWORKS.

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14th CONFERENCE ON SCIENCE AND TECHNOLOGY

Loc Dao

Department of Geomatics Engineering

INTRODUCTION TO “BKHCM” SOFTWARE FOR

ADJUSTMENT, ACCURACY ASSESSMENT AND DESIGN

SURVEYING NETWORKS

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 Survey network design

 Assess stability of control points with iterative measurements over several periods

 Comparison with other software packages

 Conclusion

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 Having a software package for adjusting vertical and

horizontal networks on the plan or Cartesian

 Supplying a tool for analyzing and designing wide range

of surveying networks

 Assessing the stable benchmarks after having data

measurements over several periods

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What is “BKHCM”?

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 Written by using Delphi programming language

(developed from Pascal) The software is compiled into exe file running on PC with OS window 95 or later OS.

 BKHCM’s menus look like Microsoft Office 2007

(Ribbon style), it also offer many window forms to input data and display results.

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BKHCM software

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Constrained adjustment of level networks

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Constrained adjustment of level networks

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Loading a level diagram into

software

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Free adjustment of level nets

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Report of level adjustment

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Constrained adjustment of horizontal surveys: traverses and networks

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Result of horizontal adjustment

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Automatic displayed diagram

networks with BKHCM

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Result: free horizontal adjustment

network

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Misclosures/loop closures for

traverses and networks

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Adjustment of GPS networks

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Checking loop closures and

misclosures in GPS networks

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Combining GPS and terrestrial

observations

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Combining GPS and terrestrial

observations

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Data input

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Results for the combination of GPS and terrestrial observations (distances –

angles)

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SURVEY NETWORK DESIGN

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Constrained & free survey network design

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Register a digital map using grid in

BKHCM

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Point selections, designed traverses & networks

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Designed diagrams

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Full display for angles, distances, bearings

and coordinates of designed points

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Tabular coordinates in survey

network design

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Assess of accuracy in horizontal surveys

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Results in assessing accuracy of

network’s factors

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Assessing stability of control points

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Assessing stability of level control points

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The analysis between period 1 and 2

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Assessing stability of horizontal

networks

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Assessing stability of horizontal

networks

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Assessing stability of GPS networks

in Cartesian coordinates

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Comparison with other software

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 There were small biases or nearly matches between

BKHCM computation results and other software such as DPSurvey, Licad Plus and Picknet.

 Some certain advantages found in this software (please refer to the full paper for more detail descriptions).

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 Offer a variety of functions and utilities

 Supply a new option to customers

 A helpful tool for Geomatics students

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BKHCM’s demo

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