com.maryanovsky.map.client
Interface Projection

All Known Subinterfaces:

WmsProjection

All Known Implementing Classes:

AbstractProjection, Epsg4326Projection, Mapa.IcsProjection, MercatorProjection, Osgeo41001Projection, OsmMercatorProjection, ScaleProjection

public interface Projection

A projection maps between latitude-longitude coordinates and pixel coordinates (at a certain zoom).

Author:

Maryanovsky Alexander

Method Summary

Point	fromLatLngToPixel(LatLng latLng, int zoom) Returns the pixel coordinates corresponding to the specified latitude-longitude coordinates at the specified zoom.
LatLng	fromPixelToLatLng(PointView pixel, int zoom) Returns the latitude-longitude coordinates corresponding to the specified pixel coordinates at the specified zoom.
SizeView	getWrapSize(int zoom) Returns the number of pixels after which the map wraps around the earth on each axis at the specified zoom.
double	getZoomMagnification(int startZoom, int endZoom) Returns the magnification coefficient between the two specified zooms, i.e.

Method Detail

fromLatLngToPixel

Point fromLatLngToPixel(LatLng latLng,
                        int zoom)

Returns the pixel coordinates corresponding to the specified latitude-longitude coordinates at the specified zoom.

fromPixelToLatLng

LatLng fromPixelToLatLng(PointView pixel,
                         int zoom)

Returns the latitude-longitude coordinates corresponding to the specified pixel coordinates at the specified zoom. This method should always return a legal value, even if the pixel coordinates fall outside the map. In such a case, the projection may, for example, choose to return the closest legal location or wrap around.

getWrapSize

SizeView getWrapSize(int zoom)

Returns the number of pixels after which the map wraps around the earth on each axis at the specified zoom. A value of 0 indicates that the map does not repeat itself.

getZoomMagnification

double getZoomMagnification(int startZoom,
                            int endZoom)

Returns the magnification coefficient between the two specified zooms, i.e. how much the map is magnified when the zoom is changed from startZoom to endZoom. This would normally be a value larger than 1 if endZoom is larger than startZoom and vice versa.