Re: Atlasの最新版を使うには？

1006 	// Calculates the width and height (in pixels) of the map, given a
1007 	// resolution.
1008 	void Tile::mapSize(unsigned int level, int *width, int *height) const
1009 	{
1010 	// The height is is the same for all tiles at a given resolution
1011 	// (a degree of latitude is pretty much the same wherever you go).
1012 	// The width is set to be as 'natural' as possible, with the
1013 	// constraint that it be a power of 2. By 'natural' I mean that
1014 	// pixels in different maps should cover approximately the same
1015 	// area. Since a 1-degree tile at 30 degrees latitude is about
1016 	// half the size of a 1-degree tile at the equator, it should have
1017 	// about half the width.
1018 	*height = 1 << level;
1019 	
1020 	// The width is proportional to the height, scaled by the latitude
1021 	// (the real latitude, not our special one) and the width of tiles
1022 	// at that latitude.
1023 	double w = *height * cos(lat() * SGD_DEGREES_TO_RADIANS) * Tile::width();
1024 	
1025 	// Oh yeah, and it has to be a power of 2, and non-zero.
1026 	*width = pow(2.0, round(log2f(w)));
1027 	if (*width == 0) {
1028 	*width = 1;
1029 	}
1030 	}

C:\Program Files\FlightGear\bin\Win32>map --help
Map - FlightGear mapping utility

Usage:
  --fg-root=path     Overrides FG_ROOT environment variable
  --fg-scenery=path  Overrides FG_SCENERY environment variable
  --atlas=path       Store maps in path
  --palette=path     Set the palette file to use
  --minmax=<lat,lon,lat,lon> Set min. and max. limits.
  --chunk=<chunk>    Limit mapping to a 10x10 degree chunk.
  --force            Force overwrite of existing images.
  --png              Create PNG images
  --jpeg             Create JPEG images with quality 75 (default)
  --jpeg=integer     Create JPEG images with specified quality
  --aafactor=integer Antialiasing factor (default = 0)
  --render-offscreen Render offscreen (default)
  --render-to-window Render to a window
  --discrete-contour Don't blend contour colours (default)
  --smooth-contour   Blend contour colours
  --no-contour-lines Don't draw contour lines (default)
  --contour-lines    Draw contour lines
  --light=azim,elev  Set light position (default = <315, 55>)
  --lighting         Light the terrain (default)
  --no-lighting      Don't light the terrain (flat light)
  --smooth-shading   Smooth polygons (default)
  --flat-shading     Don't smooth polygons
  --test             Do nothing, but report what Map would do
  --verbose          Display extra information while mapping
  --version          Print version and exit
  --help             Print this message