Feature Analyst Options: Analysis

The Analysis tab contains multiple tabs which allow the user to perform various types of analysis tests on the features within Feature Analyst. These include General, Planar, Vertical, Size, and M-Values tests, which are shown below:

• The General tab includes tests for self-intersecting polygons and line segments, a test for features that intersect other features, and whether vertices are drawn in a clockwise or counter-clockwise fashion.

• The Planar tab contains planimetric tests and the absolute value bars means the abs. value of the test parameter. For example, if the value is "20" in the | Max XY Angle | test box, then the test will indicate a failure for planimetric angles greater than 20 degrees and less than -20 degrees (angle changes in both directions). Zero degrees is a straight line. These tests are good for checking for sharp angle changes (jagged edges) in a stockpile toe. Planar tests are not for features having a Z component.

• The Vertical tab contains tests related to Z values. They involve testing for flat features, Z values greater than (Max Z) or less than (Min Z) a certain value, Slope (change in Z between points relative to the ground), and Z angle changes. Z angle tests ask how much the Z angle is changing, that is, is the slope constant or does it change?

• The Size tab contains tests related to size such as length and area of polygons and line segments.

• The M-Values tab relates to ESRI shape file "measure values." A Measure value (M Value) is an additional double precision value stored on a per vertex basis. It can be used for any general purpose the user desires. Examples include, recording temperatures at three dimensional locations or showing the amount that a vertex must be vertically displaced in order to conform when forcing a downstream/upstream constraint. M-Values analysis tests can be enabled via this tab.