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<< Click to Display Table of Contents >> Report Difference (model - file) |
  
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<< Click to Display Table of Contents >> Report Difference (model - file) |
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Purpose
To write a file listing differences in level between a ground model and points in a co-ordinate file. The co-ordinates file must be in the KTF .txt format as described for menu item File utilities, .txt Co-ordinate files. This function will compare design levels in the file with a model created from an "as built" survey. Airport approach and take off surfaces can easily be modeled in KTF with the help of menu items 3D utilities, Enquire and define Slope and can resemble a "long thin stadium". If surveyed structures and the tops of trees etc. exist in a .txt co-ordinate file the locations of points encroaching into the take off and approach envelopes will be clearly shown in the output file.
Operation
Select the input file containing "as built" survey data or tops of structures and trees etc.
Enter name for output report file.
Select the model.
The resulting report file looks like this :-
E N L Num. Code Model DIFF.
mod-file
1033.375 1016.253 13.051 8 L001 13.446 0.395
1064.456 1005.669 9.297 9 L001 10.188 0.891
1038.839 992.013 13.188 10 L001 12.184 -1.004
1022.445 992.013 11.555 11 L001 12.548 0.993
1066.163 1041.518 10.499 12 L001 11.413 0.914
1211.321 1105.258 11.145 13 L001 Outside of model
1056.942 1079.757 7.285 14 L001 8.777 1.492
1034.399 1066.442 11.002 15 L001 10.104 -0.898
1024.153 1058.248 10.115 16 L001 10.908 0.793
Note that that negative values in the right hand column indicate a tree or building encroaching into the approach path for an airfield application.