updated: 21-Sep-2010

 Copan for Windows

Multiple Inverse Calculations

Sometimes you'd like to do several inverse calculations, between one at point (or hub point) and multiple to points. A list of angles and distances may be useful for staking out (or setting out) designed points. A table of bearings and distances (or radial ties) may be required on a legal plan. A display of distances (chainages or stations) and perpendicular offsets may be useful for checking the alignment and spacing of surveyed points.

Use this special-purpose coordinate geometry module to calculate sets of

  1. radial angles (from a reference) and distances,
  2. radial bearings and distances, or
  3. distances along and perpendicular offsets from a base line,
from one start point to a set of other points, in a coordfile.

To Multi Inverses

From the Calculation menu, choose Multiple Inverses.

Note that in all of the Multi Inverse calculations below,

1. To Calculate Many Angle-Distance Pairs

  1. Click the 1. Angle & Distance Calc Mode, and optionally choose angle Left for negative, counterclockwise angles to be computed.
  2. Enter the At Point (or hub point) number.
  3. Enter the Reference Point number or Reference Bearing.
  4. Calculate or OK.

To compute multiple angle & distance pairs: choose Angle   Distance, enter the At point and Reference point or Bearing, and click Calculate.

2. To Calculate Many Bearing-Distance Pairs

  1. Click the 2. Bearing & Distance Calc Mode.
  2. Enter the At Point (or hub point) number.
  3. Optionally, use an Azimuth Correction, before Calculate, to adjust the computed bearings.
  4. Calculate or OK.

To compute multiple bearing   distance pairs: choose Bearing   Distance, enter the At point and click Calculate.

3. To Calculate Many Distance-Offset Pairs

  1. Click the 3. Distance & Offset Calc Mode.
  2. Enter the At Point (or start point) number.
  3. Enter the Reference Point number or Reference Bearing.
  4. Calculate or OK.

To compute multiple distance   offset s: choose Distance   Offset, enter the At point and Reference point or Bearing, and click Calculate.

updated: 21-Sep-2010