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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.
Input
Coordinates : P1 (N1, E1, Z1)
• 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.
PROCEDURE Surface area calculation by observing points
1. In the second OBS mode screen, press [MENU], then
select "Area calc.".
2. Enter the instrument station data.
"13.1 Entering Instrument Station Data and Azimuth
Angle"
3. Select "Area calculation" in <Area calculation>.
Output
Surface area: S (slope area and horizontal area)
...
P5 (N5, E5, Z5)
REM
Area calc.
S-O Line
S-O Arc
P-Project
PT to Line
Area calculation
Occ.Orien.
Area calculation
99
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