--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/geo-backend/src/main/java/de/intevation/gnv/geobackend/sde/datasources/RasterObject.java	Tue Jan 05 14:09:53 2010 +0000
@@ -0,0 +1,79 @@
+/**
+ *
+ */
+package de.intevation.gnv.geobackend.sde.datasources;
+
+import com.vividsolutions.jts.geom.Coordinate;
+import com.vividsolutions.jts.geom.Envelope;
+
+/**
+ * @author Tim Englich <tim.englich@intevation.de>
+ *
+ */
+public class RasterObject {
+
+    private int rasterSize;
+    private int rowIndex;
+    private int columnIndex;
+    private int rasterWidth;
+    private int rasterHeight;
+    private Envelope envelope = null;
+    private Envelope rasterEnvelope = null;
+    
+    private double[] rasterData = null;
+    /**
+     * Constructor
+     */
+    public RasterObject(Envelope envelope , double[] rasterData, 
+                        int rasterSize, int rowIndex, 
+                        int columnIndex, int rasterWidth, int rasterHeight ){
+        this.envelope = envelope;
+        this.rasterData = rasterData;
+        this.rasterSize = rasterSize;
+        this.rowIndex = rowIndex;
+        this.columnIndex = columnIndex;
+        this.rasterHeight = rasterHeight;
+        this.rasterWidth = rasterWidth;
+    }
+    public synchronized Envelope getEnvelope() {
+        if (this.rasterEnvelope == null){
+            double minX = (columnIndex* rasterSize * 
+                          (envelope.getWidth() / rasterWidth)+ envelope.getMinX());
+            double maxX = minX + (rasterSize * (envelope.getWidth() / rasterWidth));
+            
+            double maxY = envelope.getMaxY() - 
+                          (rowIndex * rasterSize * 
+                          (envelope.getHeight() / rasterHeight));
+            double minY = maxY - 
+                          (rasterSize * (envelope.getHeight() / rasterHeight));
+            this.rasterEnvelope = new Envelope(
+                    new Coordinate(minX, minY), 
+                    new Coordinate(maxX, maxY));
+        }
+        return this.rasterEnvelope;
+    }
+    
+    public synchronized double getValue(Coordinate coordinate){
+        double dxNature = coordinate.x - envelope.getMinX();
+        double dyNature = envelope.getMaxY() - coordinate.y;
+        double widthNature = envelope.getMaxX()-envelope.getMinX(); 
+        double heightNature = envelope.getMaxY()-envelope.getMinY();
+        
+        int pixelX = (int)Math.round(dxNature * rasterWidth / widthNature);
+        int pixelY = (int)Math.round(dyNature * rasterHeight/ heightNature);
+        
+        
+        int localPixelX = pixelX - (columnIndex*rasterSize);
+        int localPixelY = pixelY - (rowIndex*rasterSize);
+        
+        int pos = localPixelY * rasterSize + localPixelX;
+        
+        
+        if (pos < rasterData.length){
+            return this.rasterData[pos];
+        }
+        
+        return Double.NaN;
+    }
+
+}