Is there a link to a formal definition of Scale Rank?
(I’m guessing it doesn’t really have to do with the “Scale” or size of a country?)
What I’m trying to do:
– Some physically-sized based styling
– Trying to mimic what Google Maps does for shading / bordering of countries
— go to maps.google.com and search for Sweden, set zoom to 0 – see the red fill highlight
— set zoom to 2 – see the red border highlight replace the fill highlight
— do the same for Ghana
— see that the fill isn’t replaced by the border until zoom=4
Am I missing an attribute that could be used for this?
Thanks!
Jeff
They largely follow the Google zooms you are describing, with one notable exception:
Natural Earth scale rank 4 is roughly 1:50,000,000 scale (NEW, only in Natural Earth). And then it picks back up normally with scale rank 5 is 1:36,000,000, etc.
How Can You Tell What Map Scales Are Shown For Online Maps? (ESRI)
Nothing is perfect, but this mostly works between all themes.
This is because while the 2^x power schema is useful, it doesn’t hold up well at that one particular scale, a typical scale used in much small and medium scale maps.
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