Note on latitude/longitude numbers

[jofwu]

Somewhere need to add a note that Rosharans use 200 degrees in a circle. Matters quite a bit for anyone interpreting the numbrs on the latitutde/longitude lines. :-)

Could be written directly on the map?

Could be a text box like the State of the World legend?

Could be a mouseover thing next to the layer option?

[BlakeGilstrap]

Could be a mouseover thing next to the layer option?

Yeah a tooltip on a fa-info-circle or similar next to the option would make most sense to me.

[marvin-roesch]

I have added a note on this in #101.