X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Ffunction%2Fsrtm%2FSrtmTile.java;fp=src%2Ftim%2Fprune%2Ffunction%2Fsrtm%2FSrtmTile.java;h=301bbaf2ccb7849f1378a6f910999c188965a12a;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/function/srtm/SrtmTile.java b/src/tim/prune/function/srtm/SrtmTile.java
new file mode 100644
index 0000000..301bbaf
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+++ b/src/tim/prune/function/srtm/SrtmTile.java
@@ -0,0 +1,73 @@
+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 in 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());
+	}
+
+	/**
+	 * Constructor working out the tile for a single point
+	 * @param inLatitude latitude in degrees
+	 * @param inLongitude longitude in degrees
+	 */
+	public SrtmTile(int inLatitude, int inLongitude)
+	{
+		_latitude = inLatitude;
+		_longitude = inLongitude;
+	}
+
+	/**
+	 * 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";
+	}
+}