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22. SURFACE AREA CALCULATION
You can calculate the area of land (slope area and horizontal area) enclosed by
three or more known points on a line by inputting the coordinates of the points.
• Number of specified coordinate points: 3 or more, 50 or less
• Surface area is calculated by observing the points on a line enclosing an area
in order or reading in the previously registered coordinates in order.
• If two or less points are used to measure an area, an error will occur.
• Be sure to observe (or recall) points on an enclosed area in a clockwise or
counterclockwise direction. For example, the area specified by entering (or
recalling) point names 1, 2, 3, 4, 5 or 5, 4, 3, 2, 1 implies the same shape.
However, if points are not entered in numerical order, the surface area will not
be calculated correctly.
Slope area
The first three points specified (measured/read-in) are used to create the
surface of the slope area. Subsequent points are projected vertically onto
this surface and the slope area calculated.
Input Output
Coordinates : P1 (N1, E1, Z1) Surface area: S (slope area and horizontal area)
...
P5 (N5, E5, Z5)
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