Inverse

Main Menu | Calculations | Inverse

This command will calculate for you the inverse between two points. It will display the horizontal / slope distance, direction, vertical distance and slope between the two points. You do not need to have a line drawn between the points to use the inverse command.

A large font can be set for the results toolbar and COGO results. Please refer to the Options topic for more information.

All Inverse information is saved in the COGO History file called CogoCalcs.txt located in your Project folder. Please refer to the COGO History Viewer topic for more information.

Traverse Inverse

Function

1. Start the inverse command and make sure the Traverse Inverse and Line options are selected.

2. Enter or choose the first point to calculate from, and press your enter key to continue on to the next point.

3. Now you can choose or enter the second point and press your Enter button to compute an answer.

4. The inverse information will be displayed in the results toolbar.

5. In the COGO history you will see the following information for the two points:

-------------------------------

INVERSE

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PNT 44 to 8 (HD 1352.84' @ NA 323°48'03.1") SD 1353.39' GR -2.85' VD -38.51' AR 323°48'03.1"

Your first inverse will calculate a right angle from north to the direction you inversed.

Multiple Lines

After you have specified two points, you can continue inversing from point to point. You should notice that the point id previously in the 2nd point field will move to the 1st point field, and the cursor will remain in the 2nd point field allowing you to quickly enter in your next point.

If you continue inversing from point to point, the angle right will not be referenced to north, but the last leg you inversed. Essentially this is computing a clockwise angle between the current and last legs you inverse.

Perimeter Distance and Area

If you close back to the first point, a perimeter distance and enclosed area will also be computed.

Radial Inverse

You can compute radial inverses from a point.

Function

1. Start the inverse command and make sure the Radial Inverse and Line options are selected.

2. Enter or choose the 1st point to calculate from, and press your enter key to continue on to the next point.

3. Now you can choose or enter the 2nd point and press your Enter button to compute an answer.

4. The inverse information will be displayed in the results toolbar.

5. You can now continue computing radial inverses. The 2nd point field will remain activated allowing you to continue entering point numbers.

Radial Arc

You can compute the curve information for an arc defined by three points, PC (start), Radius Point, and PT (End)

Function

1. Start the inverse command and make sure the Rad Arc button is turned on.

2. Enter or choose the starting point for the arc in the Start field, and press your enter key to continue on to the next point.

3. Enter or choose the radius point in the Arc field, and press your enter key to continue on to the next point.

4. Enter or choose the end point for the arc in the End field, and press your enter key to compute an answer.

5. The inverse information will be displayed in the results toolbar.

Three Point Arc

You can compute the curve information for an arc defined by three points along the arc.

Function

1. Start the inverse command and make sure the 3 Pt Arc button is turned on.

2. Enter or choose the starting point for the arc in the Start field, and press your enter key to continue on to the next point.

3. Enter or choose the point that falls on the arc in the Arc field, and press your enter key to continue on to the next point.

4. Enter or choose the end point for the arc in the End field, and press your enter key to compute an answer.

5. The inverse information will be displayed in the results toolbar.