because during british period the plan and section where measured in inches one inch is equal to 2.5cms the same came after the british rule the old plans where not converted but the unit got converted so after that 10 inches where 25centimeters so in case of opencast plan 1cm=20mts
On Tuesday, February 25, 2014 11:07 AM, nihar mitra <ranjan_mitra@yahoo.co.in> wrote:
Due to shrinkage factor. When paper/plan will shrink, the drawn scale accordingly shrink and you can calculate the shrinkage factor. Accordingly you can apply the shrinkage correction to the measured plan length.
Suppose,
grid value was 10cm at the time of preparation of plan
After 10 yeras, grid value= 9.7cm
Shrinkage factor=10-9.7 = -3mm/100=0.003(-), hence correction=Positive.
This occurs generally with tracing paper/cloth.
To avoid shrinkage, use Polyster film of 25 micro mm (as Adviced by DGMS)
Nihar Mitra
Tata Steel
Sukinda-FAMD
--------------------------------------------
On Mon, 17/2/14, Saroj kumar Mirdha <saroj.1107@yahoo.com> wrote:
Subject: DGMS Mailing List: (unknown)
To: dgms_mail_list@yahoogroups.com
Date: Monday, 17 February, 2014, 7:52 PM
why do u show scales of the
plan,at least 25cm long and suitably sub
divided? can any one tell the
exact answer please.
Suppose,
grid value was 10cm at the time of preparation of plan
After 10 yeras, grid value= 9.7cm
Shrinkage factor=10-9.7 = -3mm/100=0.003(-), hence correction=Positive.
This occurs generally with tracing paper/cloth.
To avoid shrinkage, use Polyster film of 25 micro mm (as Adviced by DGMS)
Nihar Mitra
Tata Steel
Sukinda-FAMD
--------------------------------------------
On Mon, 17/2/14, Saroj kumar Mirdha <saroj.1107@yahoo.com> wrote:
Subject: DGMS Mailing List: (unknown)
To: dgms_mail_list@yahoogroups.com
Date: Monday, 17 February, 2014, 7:52 PM
why do u show scales of the
plan,at least 25cm long and suitably sub
divided? can any one tell the
exact answer please.
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