Package org.h2gis.functions.spatial.topography

Class ST_TriangleAspect

java.lang.Object
org.h2gis.api.AbstractFunction
org.h2gis.api.DeterministicScalarFunction
org.h2gis.functions.spatial.topography.ST_TriangleAspect
All Implemented Interfaces:
org.h2gis.api.Function, org.h2gis.api.ScalarFunction
public class ST_TriangleAspect extends org.h2gis.api.DeterministicScalarFunction
This function is used to compute the aspect of a triangle. Aspect represents the main slope direction angle compared to the north direction.
Author:
Erwan Bocher

  • Field Summary

    Fields inherited from interface org.h2gis.api.Function

    PROP_NAME, PROP_REMARKS

    Fields inherited from interface org.h2gis.api.ScalarFunction

    PROP_DETERMINISTIC

  • Constructor Summary

    Constructors
    Constructor
    Description
    ST_TriangleAspect()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static Double
    computeAspect(org.locationtech.jts.geom.Geometry geometry)
    Compute the aspect in degree.
    String
    getJavaStaticMethod()
     
    static double
    measureFromNorth(double angle)
    Transforms an angle measured in degrees counterclockwise from the x-axis (mathematicians) to an angle measured in degrees clockwise from the y-axis (geographers).

    Methods inherited from class org.h2gis.api.AbstractFunction

    addProperty, getProperty, removeProperty

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface org.h2gis.api.Function

    getProperty

  • Constructor Details

    • ST_TriangleAspect

      public ST_TriangleAspect()

  • Method Details

    • getJavaStaticMethod

      public String getJavaStaticMethod()

    • computeAspect

      public static Double computeAspect(org.locationtech.jts.geom.Geometry geometry) throws IllegalArgumentException
      Compute the aspect in degree. The geometry must be a triangle.
      Parameters:
      geometry - Polygon triangle
      Returns:
      aspect in degree
      Throws:
      IllegalArgumentException - ST_TriangleAspect accept only triangles

    • measureFromNorth

      public static double measureFromNorth(double angle)
      Transforms an angle measured in degrees counterclockwise from the x-axis (mathematicians) to an angle measured in degrees clockwise from the y-axis (geographers).
      Parameters:
      angle - Mathematician's angle
      Returns:
      Geographer's angle