updated: 21-Sep-2010

 Copan for Windows

COGO Calculations

Contents
  1. Direct (or traverse) Calculation
  2. Inverse (or join) Calculation
  3. Bearing-Bearing (or line-line) Intersection
  1. Distance-Distance (or arc-arc) Intersection
  2. Bearing-Distance (or line-arc) Intersection
  3. (Corner) Angle Calculation

Using Copan's COGO — coordinate geometry — calculator you can do many different computations involving bearings (or azimuths), distances (or ranges), offsets, angles, and coordfile points.

Note that to do freestation calculations, use the § Field FreeStations Processing module.

To COGO

From the Calculation menu, choose COGO or CoGo Lite.

Note that in all of the COGO calculations below,

1. To do a Direct (or traverse) Calculation
(compute new point using bearing, distance and offset from existing point)

To traverse to a new point: click Direct mode, enter an existing point number, a bearing, a distance, an offset, and the new point number, and click Calculate.

To do a long sequence of direct calculations — especially if you wish to adjust the traverse for closure — use the § Map Traverses module.

To do multiple direct calculations from one to many points, use the § Field Bearings Processing module.

2. To do an Inverse (or join) Calculation
(compute bearing, distance and offset between two existing points)

To calculate the bearing and distance between two points: click Inverse mode, enter the existing From and To point numbers, and click Calculate.

To do a long sequence of inverse calculations between successive points, use the § Area and Perimeter Calculations module.

To do multiple inverse calculations from one to many points, use the § Multiple Inverse Calculations module.

3. To do a Bearing-Bearing (or line-line) Intersection
(intersect bearings from two existing points to new point)

To intersect a new point: click Intersect mode, enter an existing point number and bearing, another existing point number and bearing, and click Calculate.

4. To do a Distance-Distance (or arc-arc) Intersection
(intersect distances from two existing points to new point)

To intersect a new point: click Intersect mode, enter an existing point number and distance, another existing point number and distance, and click Calculate.

5. To do a Bearing-Distance (or line-arc) Intersection
(intersect bearing from one point and distance from another, to new point)

To intersect a new point: click Intersect mode, enter an existing point number and bearing, another existing point number and distance, and click Calculate.

6. To do an Angle Calculation
(compute corner angle at one point, between two others)

To calculate the angle at one point between two other points: click Angle mode, enter the At, From and To point numbers, and click Calculate.

To do multiple angle calculations at one point, from one reference point, to many points, use the § Multiple Inverse Calculations module.

updated: 21-Sep-2010