tiling library

Tiling schemes and tile matrix sets (web mercator, global geodetic).

This libary exports a subset of package:geobase/geobase.dart.

Usage: import package:geobase/tiling.dart

Classes

GeoTileMatrixSet: A tile matrix set with conversions between tiles and geographic positions.
GlobalGeodeticQuad: "Global Geodetic Quad" tile matrix set ("World CRS84 Quad" for WGS 84).
ScaledConverter: A coordinate converter between geospatial positions and scaled coordinates.
TileMatrixSet: A tiling scheme represented as a set of tile matrices (grids).
WebMercatorQuad: "Web Mercator Quad" tile matrix set.

earthCircumferenceWgs84 → const double: The earth circumference in meters (from earth equatorial radius by WGS 84).
2 * math.pi * earthRadiusWgs84
earthRadiusWgs84 → const double: The earth equatorial radius in meters as specified by WGS 84.
6378137.0
maxLatitude → const double: The maximum value for the geographic latitude.
90.0
maxLatitudeWebMercator → const double: The maximum value for the geographic latitude inside the Web Mercator projection coverage.
85.05112878
maxLongitude → const double: The maximum value for the geographic longitude.
180.0
minLatitude → const double: The minimum value for the geographic latitude.
-90.0
minLatitudeWebMercator → const double: The minimum value for the geographic latitude inside the Web Mercator projection coverage.
-85.05112878
minLongitude → const double: The minimum value for the geographic longitude.
-180.0
screenPPIbyOGC → const double: OGC defines a screen pixel of 0.28 mm that approximates to 90.7 ppi.
0.0254 / 0.00028