defines: Min/max latitude should be 85.05113
defines: Min/max latitude should be 85.05113

So it seems that the map_source_get_y breaks down when
given values close to +-90. Some googling brought me to the
conclusion that we should have a MIN/MAX latitude of
85.05113, since that is what the Mercator projection
truncates latitude to.

See https://en.wikipedia/wiki/Mercator_projection for
more information,

StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain