Class MMMercatorProjection

Object
   |
   +--MMProjection
         |
         +--MMMercatorProjection

class MMMercatorProjection

extends MMProjection

Defined in MultimapOpenAPI

Constructor Detail

MMMercatorProjection

MMMercatorProjection( <integer> zoom_factors, type )

Constructor for MMMercatorProjection, should be over-ridden.

Parameters:
zoom_factors - The number of zoom factors you want this projection to work over.

checkTileRange

Object checkTileRange( <MMPoint> tile, <integer> zoom_factor, <integer> tile_size )

Checks whether the given tile coordinates are valid for the projection. It may also modify the coordinates of the tile to allow wrapping of tiles.

Parameters:
tile - Coordinates of a tile.
zoom_factor - The zoom factor to check the tile at.
tile_size - The size of the tile.

fromLatLonToMeters

MMPoint fromLatLonToMeters( latlon )

Converts lat/lon to Mercator Eastings/Northings.

Parameters:
lonlat - Latitude and longitude to convert.

Returns:
Mercator Eastings/Northings stored in an MMPoint.

fromLatLonToPixel

MMPoint fromLatLonToPixel( <MMLatLon> pos, <integer> zoom_factor )

Returns map coordinates in pixels for a point with the given coordinates, at the specified zoom factor.

Parameters:
pos - Geographic position of the point.
zoom_factor - The zoom factor at which you want the pixels returned.

fromMetersToLatLon

MMLatLon fromMetersToLatLon( meters )

Converts Mercator eastings/northings to lon/lat.

Parameters:
Eastings - /Northings stored in an MMPoint

Returns:
Latitude and longitude of the given location.

fromPixelToLatLon

MMLatLon fromPixelToLatLon( <MMPoint> pixel, <integer> zoom_factor, unbounded )

Returns map coordinates in lat/lon for a point with the given coordinates in pixels, at the specified zoom factor.

Parameters:
pixel - Pixel position of the point.
zoom_factor - The zoom factor at which you want the coordinates returned.

getWrapWidth

Object getWrapWidth( <integer> zoom_factor )

Returns the number of pixels after which the map repeats itself because it has wrapped around the earth.

Parameters:
zoom_factor - The zoom factor to check.