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clarified -z option in readme

This commit is contained in:
Andrew Brown
2010-10-19 21:26:59 -04:00
parent a10688132a
commit 32ba6c4424

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@@ -138,12 +138,22 @@ Options
-z ZOOM, --zoom=ZOOM
The Overviewer by default will detect how many zoom levels are required
to show your entire map. This is equivilant to the dimensions of the
highest zoom level, in tiles. A zoom level of z means the highest zoom
level of your map will be 2^z by 2^z tiles.
to show your entire map. This option sets it manually.
The -z option will set the zoom level manually. This could be useful if
you have some outlier chunks causing your map to be too large.
*You do not normally need to set this option!*
This is equivalent to setting the dimensions of the highest zoom level. It
does not actually change how the map is rendered, but rather *how much of
the map is rendered.* (Calling this option "zoom" may be a bit misleading,
I know)
To be precise, it sets the width and height of the highest zoom level, in
tiles. A zoom level of z means the highest zoom level of your map will be
2^z by 2^z tiles.
This option map be useful if you have some outlier chunks causing your map
to be too large, or you want to render a smaller portion of your map,
instead of rendering everything.
This will render your map with 7 zoom levels::