taft-chamber.org

Also -The co-ordinates of the inspection chamber.
– WCB and distance from station A

Buried
Chamber SW2

43.525m distance from chamber SW1 to SW2
27.810m distance from chamber SW3 to SW2

Inspection chamber SW1
140E
IL 42.300
CL 45.500

BC2
Inspection chamber SW3
191.625E
263.350N
IL 42.500
CL 46.000

Station A
120E, 260N
45,500

i’m not familiar with the terms IL and CL, here.

the E and N pairs look like latitude+longitude but usually N only goes as far as 90 degrees, if that were the case; so you want to find Cartesian co-ordinates with equal x-y scales, for as many of these as you can; then you can draw a to-scale map, showing points you know, and estimating those you don’t know.

extend circles around the points SW1 and SW3 with radii 43.525 and 27.810 respectively, making adjustments until things fit.

algebraically, it becomes a system of polynomial equations where circles intersect, so you might have expressions of the form (x-a)² + (y-b)² = R² to map each of the circles

One Response

1. Vansig Says:
   January 15th, 2010 at 9:30 pm

   i’m not familiar with the terms IL and CL, here.

   the E and N pairs look like latitude+longitude but usually N only goes as far as 90 degrees, if that were the case; so you want to find Cartesian co-ordinates with equal x-y scales, for as many of these as you can; then you can draw a to-scale map, showing points you know, and estimating those you don’t know.

   extend circles around the points SW1 and SW3 with radii 43.525 and 27.810 respectively, making adjustments until things fit.

   algebraically, it becomes a system of polynomial equations where circles intersect, so you might have expressions of the form (x-a)² + (y-b)² = R² to map each of the circles
   References :

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