Fixing black column problem in kriging

hortonmachine/pom.xml

@@ -7,9 +7,8 @@
     <version>0.7.9-SNAPSHOT</version>
   </parent>
 
-	<groupId>org.jgrasstools</groupId>
 	<artifactId>jgt-hortonmachine</artifactId>
-    <version>0.7.9-SNAPSHOT</version>    
+    <version>0.7.9-SNAPSHOT</version>
 	<packaging>jar</packaging>
 	<name>The Horton Machine</name>
 
@@ -88,4 +87,9 @@
 		</plugins>
 	</build>
 -->
+
+    <properties>
+       <maven.compiler.source>1.7</maven.compiler.source>
+       <maven.compiler.target>1.7</maven.compiler.target>
+    </properties>
 </project>

hortonmachine/src/main/java/org/jgrasstools/hortonmachine/i18n/HortonMessages.java

@@ -126,8 +126,8 @@ public class HortonMessages {
     public static final String OMSKRIGING_pA_DESCRIPTION = "The range if the models runs with the gaussian variogram.";
     public static final String OMSKRIGING_pS_DESCRIPTION = "The sill if the models runs with the gaussian variogram.";
     public static final String OMSKRIGING_pNug_DESCRIPTION = "Is the nugget if the models runs with the gaussian variogram.";
-    public static final String OMSKRIGING_outGrid_DESCRIPTION = "The interpolated gridded data (for mode 2 and 3.";
-    public static final String OMSKRIGING_outData_DESCRIPTION = "The interpolated data (for mode 0 and 1).";
+    public static final String OMSKRIGING_outGrid_DESCRIPTION = "The interpolated gridded data (for pMode == 1).";
+    public static final String OMSKRIGING_outData_DESCRIPTION = "The interpolated data (for pMode == 0).";
 
     public static final String OMSNETNUMBERING_DESCRIPTION = "Assigns the numbers to the network's links.";
     public static final String OMSNETNUMBERING_DOCUMENTATION = "OmsNetNumbering.html";

hortonmachine/src/main/java/org/jgrasstools/hortonmachine/modules/statistics/kriging/OmsGridPoint.java

@@ -0,0 +1,57 @@
+package org.jgrasstools.hortonmachine.modules.statistics.kriging;
+
+import org.geotools.coverage.grid.GridCoordinates2D;
+import org.geotools.coverage.grid.GridGeometry2D;
+
+import com.vividsolutions.jts.geom.Coordinate;
+
+/**
+ * A world coordinate associated with its respective grid point in the context
+ * of a certain grid geometry.
+ * 
+ * <p>
+ * This is useful so that there's no need to convert the world point into the
+ * grid point by using the mathematical transform, which can lead to rounding
+ * errors which in turn invite all kinds of trouble (see
+ * https://github.com/moovida/jgrasstools/issues/12, for example)
+ * 
+ * @author Rafael Almeida (@rafaelalmeida)
+ * @since 0.7.9
+ *
+ */
+public class OmsGridPoint {
+	private GridGeometry2D gridGeometry;
+	private GridCoordinates2D gridCoordinates;
+	private Coordinate worldCoordinates;
+
+	public GridCoordinates2D getGridCoordinates() {
+		return gridCoordinates;
+	}
+
+	public void setGridCoordinates(GridCoordinates2D gridCoordinates) {
+		this.gridCoordinates = gridCoordinates;
+	}
+
+	public Coordinate getWorldCoordinates() {
+		return worldCoordinates;
+	}
+
+	public void setWorldCoordinates(Coordinate worldCoordinates) {
+		this.worldCoordinates = worldCoordinates;
+	}
+
+	public GridGeometry2D getGridGeometry() {
+		return gridGeometry;
+	}
+
+	public void setGridGeometry(GridGeometry2D gridGeometry) {
+		this.gridGeometry = gridGeometry;
+	}
+
+	@Override
+	public String toString() {
+		return "OmsGridPoint [gridCoordinates=" + gridCoordinates
+				+ ", worldCoordinates=" + worldCoordinates + "]";
+	}
+
+}