org.simantics.district.network/src/org/simantics/district/network/ModelledCRS.java

   1 package org.simantics.district.network;
   2
   3 import org.geotools.referencing.GeodeticCalculator;
   4 import org.opengis.referencing.FactoryException;
   5 import org.opengis.referencing.crs.CoordinateReferenceSystem;
   6 import org.simantics.databoard.Bindings;
   7 import org.simantics.db.ReadGraph;
   8 import org.simantics.db.Resource;
   9 import org.simantics.db.exception.DatabaseException;
  10 import org.simantics.district.network.ontology.DistrictNetworkResource;
  11
  12 public class ModelledCRS implements CRS {
  13
  14     private GeodeticCalculator calculator;
  15
  16     public ModelledCRS(ReadGraph graph, Resource type) throws DatabaseException, FactoryException {
  17         String wkt = graph.getRelatedValue2(type, DistrictNetworkResource.getInstance(graph).HasSRTEXT, Bindings.STRING);
  18         CoordinateReferenceSystem crs = org.geotools.referencing.CRS.parseWKT(wkt);
  19         this.calculator = new GeodeticCalculator(crs);
  20     }
  21
  22     @Override
  23     public double calculateDistance(double[] start, double[] end) {
  24         // TODO: fix the scale..
  25         calculator.setStartingGeographicPoint(start[0] / 100000, start[1] / 100000);
  26         calculator.setDestinationGeographicPoint(end[0] / 100000, end[1] / 100000);
  27         return calculator.getOrthodromicDistance();
  28     }
  29
  30 }