Surface And Volume - Pentax R-200 Series Instruction Manual

8.3 3D SURFACE AND VOLUME
2D CONTOUR
This function calculates the center, the 2D and 3D surface and positive, negative and total volume.
First, you select the points that are used for the volume calculation. The order in which you select
the points is not important. Please refer 2D SURFACE chapter about selection way. PowerTopoLite
generates a mesh ( triangulation ) of the points automatically and calculates the result based on the
mesh.
The contour of the points will always be convex. A polygon is generated so that an area may become
the biggest. It is like a rope, which is laid around the points, and then tighten.
You have to give the reference height, which is used for volume calculation: the part of the volume
that is situated below the reference height is called negative volume and the part above the reference
height is called positive volume.
Note: Relations between each volume and reference height are as follows.
Note: Selected points should be less than 350 points.
In 3D Volume, the case that inputted reference height is lower than a solid
Plane Figure
2D & 3D
SURFACE
Profile Figure
66
Profile Figure