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// prepare bbox | |
struct BoundingBox { | |
// latitudes range from -90 .. +90 | |
// longitudes range from -180 .. +180 | |
var latmin = 90.0 | |
var latmax = -90.0 | |
var lngmin = 180.0 | |
var lngmax = -180.0 | |
} | |
var bbox = BoundingBox() |