Thursday, 9 August 2018

PROCEDURE OF PLOTTING



  PROCEDURE OF PLOTTING

1 1.  A suitable scale is chosen so that the area can be accommodated in the space    available in the map.
       2.   A margin about 2 cm from the edge of the sheet is drawn around the sheet.
       3.  The title block is prepared on the right hand bottom corner.
       4.   The north line is marked on the right hand top corner, and should preferably       be vertical. When it is not convenient to have a vertical north line, it may be       inclined to accommodate the whole area within the map.
       5.   A suitable position for base line is selected on the sheet so that the whole           area along with the objects it contains can be drawn within the space                 available in the map.
        6.   The framework is completed with all survey lines, check lines and tie lines. If      there is some plotting error which exceed the permissible limit, the incorrect      lines should be resurveyed.
         7.    Until the framework is completed in proper form, the offsets should not be          plotted (Fig. 41). 
         8.    The plotting of offsets should be continued according to the sequence                maintained in the field book.
         9.    The main stations, sub-stations, chain line, objects, etc. should be shown as      per standard symbols (discuss on previous post).
10. The conventional symbols used in the map should be shown on the  
          right hand side.
11. The scale of the map is drawn below the heading or in some suitable  
     space. The heading should be written on the top of the map.
12. Unnecessary lines, objects, etc. should be erased.
13. The map should not contain any dimensions.



Inking of the map: The inking of the map should be started after the pencil work is completed in all respects. The colour (color) conventions are shown in the previous post (Fig. 37, 38, 39 & 40).
  The inking should be begin from the left hand side towards the right hand side, and top towards the bottom.   


(Next post on “Procedure of Field Work”) 

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