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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 final int _latitude;
/** Longitude in degrees east/west */
private final int _longitude;
/**
* 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;
}
@Override
public int hashCode()
{
return _latitude * 1000 + _longitude;
}
/**
* Check for equality
* @param inOther other tile object
* @return true if both represent same tile
*/
@Override
public boolean equals(Object inOther)
{
if (inOther == null || inOther.getClass() != getClass()) {
return false;
}
SrtmTile otherTile = (SrtmTile) inOther;
return (_latitude == otherTile._latitude) && (_longitude == otherTile._longitude);
}
/**
* @param inPoint point to test
* @return true if this tile contains data for the specified point
*/
public boolean contains(DataPoint inPoint)
{
final int pointLatitude = (int) Math.floor(inPoint.getLatitude().getDouble());
final int pointLongitude = (int) Math.floor(inPoint.getLongitude().getDouble());
return pointLatitude == _latitude && pointLongitude == _longitude;
}
/** @return latitude as int */
public int getLatitude() {
return _latitude;
}
/** @return longitude as int */
public int getLongitude() {
return _longitude;
}
/**
* @return name of tile (without filename suffix)
*/
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);
}
}
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