16#ifndef QGSDISTANCEAREA_H
17#define QGSDISTANCEAREA_H
21#include <QReadWriteLock>
67 bool willUseEllipsoid()
const;
98 bool setEllipsoid(
const QString &ellipsoid );
107 bool setEllipsoid(
double semiMajor,
double semiMinor );
211 double measureLineProjected(
const QgsPointXY &p1,
double distance = 1,
double azimuth = M_PI_2,
QgsPointXY *projectedPoint
SIP_OUT =
nullptr )
const;
249 static QString formatDistance(
double distance,
int decimals,
Qgis::DistanceUnit unit,
bool keepBaseUnit =
false );
261 static QString formatArea(
double area,
int decimals,
Qgis::AreaUnit unit,
bool keepBaseUnit =
false );
283 double convertAreaMeasurement(
double area,
Qgis::AreaUnit toUnits )
const;
295 QgsPointXY computeSpheroidProject(
const QgsPointXY &p1,
double distance = 1,
double azimuth = M_PI_2 )
const;
316 QVector<QVector<QgsPointXY> > geodesicLine(
const QgsPointXY &p1,
const QgsPointXY &p2,
double interval,
bool breakLine =
false )
const;
367 double computePolygonArea(
const QVector<QgsPointXY> &points )
const;
369 double computePolygonFlatArea(
const QVector<QgsPointXY> &points )
const;
375 void computeAreaInit()
const;
393 double mSemiMajor, mSemiMinor, mInvFlattening;
395 mutable std::unique_ptr< geod_geodesic > mGeod;
400 double measureLine(
const QgsCurve *curve )
const;
401 double measurePolygon(
const QgsCurve *curve )
const;
DistanceUnit
Units of distance.
Abstract base class for all geometries.
This class represents a coordinate reference system (CRS).
Contains information about the context in which a coordinate transform is executed.
Custom exception class for Coordinate Reference System related exceptions.
Abstract base class for curved geometry type.
A general purpose distance and area calculator, capable of performing ellipsoid based calculations.
QgsCoordinateReferenceSystem ellipsoidCrs() const
Returns the ellipsoid (destination) spatial reference system.
QgsCoordinateReferenceSystem sourceCrs() const
Returns the source spatial reference system.
double ellipsoidInverseFlattening() const
Returns ellipsoid's inverse flattening.
QString ellipsoid() const
Returns ellipsoid's acronym.
double ellipsoidSemiMajor() const
Returns the ellipsoid's semi major axis.
double ellipsoidSemiMinor() const
Returns ellipsoid's semi minor axis.
A geometry is the spatial representation of a feature.
A class to represent a 2D point.
#define SIP_THROW(name,...)
const QgsCoordinateReferenceSystem & crs
Contains parameters for an ellipsoid.