geodesy library
Ellipsoidal (vincenty) and spherical (great circle, rhumb line) geodesy tools, with ellipsoidal datum, UTM, MGRS and ECEF support.
This libary exports a subset of package:geobase/geobase.dart.
Usage: import package:geobase/geodesy.dart
Classes
- Datum
- A geodetic datum with a reference ellipsoid and datum transformation parameters.
- Ellipsoid
- A reference ellipsoid with ellipsoidal parameters (a, b and f).
- Ellipsoidal
- The base class for calculations related to the Earth surface modeled by ellipsoidal reference frames with geographic position (latitude, longitude) as an origin.
- EllipsoidalVincenty
- Distances & bearings between points, and destination points given start points & initial bearings, calculated on an ellipsoidal earth model using ‘direct and inverse solutions of geodesics on the ellipsoid’ devised by Thaddeus Vincenty.
- Geocentric
- The base class for calculations related to the Earth surface modeled by ellipsoidal reference frames with geocentric cartesian position (X, Y, Z) as an origin.
- GeodeticArcSegment
- A geodetic (geographic) arc segment between the origin position and the destination position along a geodesic.
- HistoricalEllipsoids
- Some historical geodetic ellipsoids defined as static constants.
- Mgrs
- Military Grid Reference System (MGRS/NATO) grid references, with methods to parse references, and to convert between MGRS references and UTM coordinates.
- MgrsGridSquare
- The 100km grid square (or the 100,000-meter square identifier) as a part of the grid zone in MGRS/NATO grid references.
- MgrsGridZone
- A grid zone as a polygon of 6° × 8° in MGRS/NATO grid references.
- SphericalGreatCircle
- Latitude/longitude points on a spherical model earth, and methods for calculating distances, bearings, destinations, etc on (orthodromic) great-circle paths.
- SphericalGreatCircleLineString
- Calculations for line strings (as an iterable of geographic positions) on a spherical model earth (great-circle paths).
- SphericalRhumbLine
- Latitude/longitude points on a spherical model earth, and methods for calculating distances, bearings, destinations, etc on (loxodromic) rhumb lines.
- Utm
- UTM coordinates, with functions to parse them and convert them to geographic points.
-
UtmMeta<
T extends Object> - Metadata (convergence and scale) as a result from UTM calculations related to position.
- UtmZone
- The UTM zone represented by the lonZone number and hemisphere.
Enums
- CoordRefSysType
- An enumeration of common coordinate reference system (CRS) types.
- Coords
- An enum for coordinate types (by spatial dimension and whether is measured).
- Hemisphere
- An enum representing the hemispheres of the Earth.
Extensions
- DoubleAngleExtension on double
- An extension on double with basic degrees and radians utility methods.
- EllipsoidalExtension on Geographic
- An extension of the Geographic class providing calculations related to the Earth surface modeled by ellipsoidal reference frames (or datums).
- EllipsoidalVincentyExtension on Geographic
- An extension for easier access to EllipsoidalVincenty.
- GeographicDoubleAngleExtension on double
- An extension on double with basic degrees and radians utility methods ( (for geographic coordinate reference systems).
- SphericalGreatCircleExtension on Geographic
- An extension for easier access to SphericalGreatCircle.
-
SphericalGreatCircleIterableExtension
on Iterable<
Geographic> - An extension for easier access to SphericalGreatCircleLineString for iterables of geographic positions.
- SphericalGreatCirclePositionSeriesExtension on PositionSeries
- An extension for easier access to SphericalGreatCircleLineString for series of positions.
- SphericalRhumbLineExtension on Geographic
- An extension for easier access to SphericalRhumbLine.
Constants
- 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.
- maxLatitudeUTM → const double
- The maximum value for the geographic latitude inside the Universal Transverse Mercator (UTM) projection coverage.
- 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.
- minLatitudeUTM → const double
- The minimum value for the geographic latitude inside the Universal Transverse Mercator (UTM) projection coverage.
- 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.