CompNet & CompRight Surveying Horizons. Practical Approach By Trevor Collins, Phil Enright & Andrew Field

Transcription

1 CompNet & CompRight Surveying Horizons Practical Approach By Trevor Collins, Phil Enright & Andrew Field

2 Why Use CompNet & CompRight NSW Legislation Survey and Drafting Directions 2000 (S&DD) S&DD requires Mine Surveyors to comply with CLASS D for control surveys. CLASS D is defined in the Inter- Governmental Committee on Surveying and Mapping (ICSM), Standard & Practices (SP1)

3 SP1 Part A Standards of Accuracy Part B Recommended Survey and Reduction Practices.

4 Part A Uses the Standard confidence level (1σ) ) as the standard for statistical testing for allocation of CLASS and ORDER. CLASS is a function of planned and achieved precision of a survey network. Depends on Network design Survey practice adopted Equipment & instruments used Reduction techniques used.

5 CLASS Is proven by the results of successful minimally constrained least squared adjustment. Generally achieved by assessing the semi- major axis of each relative standard error ellipse (1σ). Semi-major major ellipse is to be less than or equal to the length of the max. allowable semi-major major axis using formula: r=c(d+0.2)

6 Formula r=c(d+0.2) r = length of max. allowable semi major axis in mm c = empirically derived factor by historically accepted precision for a standard of survey For CLASS D, c = 50 d = distance to any survey in km. d will be minimum of 1km in the new S&DD to assist decline surveys and Longwall surveys where there are short horizontal distances between traverse stations.

7 PART B Provide surveyors with a guide to minimally acceptable practices required to meet the standards of a particular CLASS and ORDER of Survey These apply to the: Equipment eg theodolite 1 1 least count Calibration of equipment annual EDM baseline Observation requirements 1 set, 4 rounds of angles Reduction methods least squares adjustment

8 What is CompNet/CompRight? CompNet is designed to provide a rigorous least squares adjustment of most forms of surveying measurement in 1, 2 or 3 dimensions. CompRight enables collection of terrain and detail survey information in a text format rather than a CAD system for processing by CompNet.

9 What is the difference between the CompNet/CompRight? CompNet takes a traverse network, & applies the least squares adjustment to the data. Projections corrections applied e.g. scale factor. Station co-ordinates ordinates & statistical information generated. Traverse information can be directly imported into CompNet. However if sideshot or pickup work has been included with the traverse, data should be imported through CompRight.

10 What is the difference between the CompNet/CompRight? CompRight can be looked at as the front end of the package. No least squares adjustment carried out. No statistical information generated. Traverse Information is sent to CompNet for least squares adjustment, then the sideshot or pickup is reduced from this network in CompRight. Produce 3D graphic files in various formats (DXF, 12D, MX, Liscad or csv) Allows for the stringing of coded entities in DXF format

11 CompNet/CompRight Features Least Squares Adjustment One (levels), two and three dimensional projects Projection MGA, AMG, ISG, Plane, WGS84 and more. Import data GPS, total station, Cad, baseline or manual entry Fieldbook output of reduced observations

12 CompNet/CompRight Features Importation of Coordinates SCIMS, database, existing project Statistical Analysis and Reporting Class compliance Error ellipses (including graphical view) observed and final measurements Statistical analysis Adjustment of angles shown as offset (mm)

13 Demonstration of CompNet Create New Project Importation of Total Station data Sets of Angles traverse. Fieldbook Adjustment and Analysis Output files Output data

14 Create New Project

15 Importing Data File From Theodolite Number importation formats including Leica, Geodimeter,, Sokkia, Topcon

16 Selecting File to Import Path to data. Choice of Obs. Means Calibration Frequency Calibration Constant Planes height Angle Tolerance Distance Tolerance

17 Successful Importation Successful importation No fixed coordinates are evident you are required to move the start points from the points file to the fixed file. Correct fixed coordinates either manually or importing from a previous project or database.

18 Fieldbook

19 Moving Starting Points To Fixed Coordinates

20 Importing Fixed Coordinates

21 Process All Maximum Co-ordinate ordinate Increment Estimate of Variance Factor 95% Confidence Level Degrees of Freedom Adjustment passes

22 Full Network

23 Output File Adjustment expressed in seconds and calculated offset in mm Assists in identifying quality of survey and errors

24 Output File Class Agreement Details of corrections and final results

25 Output File Class Agreement Details of corrections and final results

26 Error Ellipses

27 Graphical View - Error Ellipse Assist in confirming quality and confidence of survey. Many other graphical options to analyse results.

28 Demonstration of CompRight Coding Features Create New Project Importation of Survey Data, including traverse information & survey pickup Adjustment and Analysis in CompNet Output files Output data

29 CompRight Set up & Features In CompRight, Format & customise the Feature Code List.

30 CompRight Set up & Features Code Structure String Details Multiple Codes Trees Offset Info Station Identification Limits

31 CompRight Set up & Features CompRight.LST. This file can be edited & changed Code Structure controls maximum length of code name.

32 CompRight Set up & Features No matter what functions you do in CompRight, the screen does not change. It does not generate a picture like CompNet.

33 CompRight Set up & Features Project Name Path to data. Projection is MGA, unless ISG required. Zone Datum is zero for AHD. Dimension is either 3D or 2D Entry Mode OK to continue.

34 CompRight Importation of Data Path Path to file Calibration freq ppm Calibration const m Planes Planes height m Vertical Vertical index correction

35 CompRight Viewing & Editing Data

36 CompRight Viewing & Editing Data F: is for Fixed Co-ordinates ordinates S: is for Station Setup M: is for measurement data

37 CompRight Data Validation Upon saving & closing of the NCE File, validation of data file occurs. Checks Checks data format Checks Checks Codes are correct Checks Checks formatting is correct Highlights possible problems like negative heights

38 CompRight > CompNet > CompRight After validation the traverse network is sent to CompNet for adjustment. This process is treated the same as previous example. Printout of Output file for archiving of survey. Return to CompRight for radiations information to be reduced within the traverse network. Projection corrections are applied to all sideshot reductions.

39 Output Options for CompRight There are various options for file output that cover most programs. DXF, LISCAD, XYZ, MX, 12D, SURPAC & CSV Strings of coded features are joined when the DXF option is selected.

40 Output Options for CompRight Different Different entities are strung together & are in separate layers.

41 Questions