constants library

Epsilon, geodetic and screen related constants.

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

Usage: import package:geobase/constants.dart

Constants

defaultEpsilon → const double

The default epsilon value 1.0e-9 used as a tolerance in equals2D, equals3D and similar methods in this package.

doublePrecisionEpsilon → const double

The maximum relative precision of double numbers (IEEE 754).

earthCircumferenceWgs84 → const double

The earth circumference in meters (from earth equatorial radius by WGS 84).

earthRadiusWgs84 → const double

The earth equatorial radius in meters as specified by WGS 84.

maxLatitude → const double

The maximum value for the geographic latitude.

maxLatitudeWebMercator → const double

The maximum value for the geographic latitude inside the Web Mercator projection coverage.

maxLongitude → const double

The maximum value for the geographic longitude.

minLatitude → const double

The minimum value for the geographic latitude.

minLatitudeWebMercator → const double

The minimum value for the geographic latitude inside the Web Mercator projection coverage.

minLongitude → const double

The minimum value for the geographic longitude.

screenPPIbyOGC → const double

OGC defines a screen pixel of 0.28 mm that approximates to 90.7 ppi.