Version 10, May 2010

[GpsPrune.git] / tim / prune / function / srtm / SrtmTile.java

diff --git a/tim/prune/function/srtm/SrtmTile.java b/tim/prune/function/srtm/SrtmTile.java
new file mode 100644 (file)
index 0000000..d7ab38f
--- /dev/null
+++ b/tim/prune/function/srtm/SrtmTile.java
@@ -0,0 +1,62 @@
+package tim.prune.function.srtm;
+
+import tim.prune.data.Coordinate;
+import tim.prune.data.DataPoint;
+
+/**
+ * Class to represent a single tile of Srtm data, from a single hgt.zip file
+ */
+public class SrtmTile
+{
+       /** Latitude in degrees north/south */
+       private int _latitude = 0;
+       /** Longitude ini degrees east/west */
+       private int _longitude = 0;
+
+       /**
+        * Constructor working out the tile for a single point
+        * @param inPoint data point
+        */
+       public SrtmTile(DataPoint inPoint)
+       {
+               Coordinate latitude = inPoint.getLatitude();
+               _latitude = (int) Math.floor(latitude.getDouble());
+               Coordinate longitude = inPoint.getLongitude();
+               _longitude = (int) Math.floor(longitude.getDouble());
+       }
+
+       /**
+        * Check for equality
+        * @param inOther other tile object
+        * @return true if both represent same tile
+        */
+       public boolean equals(SrtmTile inOther)
+       {
+               return (_latitude == inOther._latitude) && (_longitude == inOther._longitude);
+       }
+
+       /** @return latitude as int */
+       public int getLatitude() {
+               return _latitude;
+       }
+
+       /** @return longitude as int */
+       public int getLongitude() {
+               return _longitude;
+       }
+
+       /**
+        * @return filename of tile
+        */
+       public String getTileName()
+       {
+               return (_latitude >= 0?"N":"S")
+                       + (Math.abs(_latitude) < 10?"0":"")
+                       + Math.abs(_latitude)
+                       + (_longitude >= 0?"E":"W")
+                       + (Math.abs(_longitude) < 100?"0":"")
+                       + (Math.abs(_longitude) < 10?"0":"")
+                       + Math.abs(_longitude)
+                       + ".hgt.zip";
+       }
+}