L Section

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L Section

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For this, open a new blank file in AutoCAD. Give 'Lsec' command:

This will display:
L Section dialog box

Taking all parameters one by one:

Click on 'XLS(X) File' button to browse XLS data file, if required. This data file's path will display in edit box.

Click 'DWG File' button to browse a DWG block used in L Section. This file may be 'LSdwg(L)1.dwg', present in 'CSxSupport' folder.

'Off' the 'Roundup by 0.005' button. 'On' this button in final L section, if you want.

Enter '4.5' in edit box, for height of texts used in L Section.

Here, we want L section of centre RLs of GL data, hence give '0', in this edit box.

'Off' this button. In final L section, this will 'On'.

Enter 0.1 and 1.0 for '1 unit : ?Verticle' and '1 unit : ?Horizontal' respectively. 1 meter for every 0.1 unit in vertical and 1 meter for every 1.0 unit in horizontal direction. Here vertical is 10 times large then horizontal. This is the ratio, not scale. Give scale at plotting time.

See the following self explanatory figure for above parameter:
L section parameters

Click 'OK' button.
After few seconds, you found following messages in command prompt:
Give range in command prompt

Give Range for L section (????-????) <ALL>: Press enter for all. A block will display in drawing area:
Pick points

and following messages will display in command prompt:
Pick point for chainages or 'Enter': Pick at 1
Pick point for (0.000) RLs or 'Enter': Pick at 2
After picking all points, we will get L section as shown in previous page.
'Save As' dialog box will display. Click 'Save', to save this drawing:
Save As dwg file

Note that file name with full path is displayed in top of AutoCAD window:

You can give any different file name also. This L section is only for checking and correcting data. Final L section will drawn again in a new file. Hence it is not necessary to save this L section.
Now we want to draw cross sections in this L section drawing, to check GL survey data:
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