Measurement Values

Once you have the cursor positioned properly, you can read various distances and angles from the window. All angles will be displayed as degrees. The distance will be in feet or meters depending on the settings. There are eight basic measurements:

1. Start. This item displays the location of the Start Cursor. The value is displayed as the distance north, east and vertical from the entrance or a reference point.

2. End. This item displays the location of the End Cursor. The value is displayed as the distance north, east and vertical from the entrance or a reference point.

3. New. This item displays the location of the mouse cursor as you move it around the screen. The value is displayed as the distance north, east and vertical from the entrance or a reference point.

4. Delta. Delta gives the absolute difference between the start and end points in east, north and vertical distance. This information is useful because it ignores slope distance. For example, you can find the elevation difference between two stations in the cave.

5. Len2D. This gives you the straight-line distance between the start and end points. The distance is calculated in two dimensions, so it ignores the dimension that runs into and out of the screen. For example, if you are in plan view, this measurement ignores the vertical dimension. It is useful, because you don't have to go to all the trouble of placing the points in three dimensions to get a useful length.

6. Len3D. This also gives you the straight-line distance between the two points, except that the distance is calculated in three dimensions. This is important because two points may seem close together, when they are actually separated by long distances in the third dimension. For example, if you are in plan view, two points could appear to be five feet apart, when they are actually 1000 feet apart, mostly in the vertical direction. This measurement will not give correct values unless the cursors have been placed in three dimensions.

7. Azimuth. This measurement gives you the compass angle from the Start cursor to the End cursor in degrees.

8. Inclination. This measurement gives you the vertical angle from the Start cursor to the End cursor in degrees.