16 #ifndef QGSDISTANCEAREA_H
17 #define QGSDISTANCEAREA_H
19 #include "qgis_core.h"
21 #include <QReadWriteLock>
70 bool willUseEllipsoid()
const;
102 bool setEllipsoid(
const QString &ellipsoid );
111 bool setEllipsoid(
double semiMajor,
double semiMinor );
157 double measureArea(
const QgsGeometry &geometry )
const;
169 double measureLength(
const QgsGeometry &geometry )
const;
181 double measurePerimeter(
const QgsGeometry &geometry )
const;
189 double measureLine(
const QVector<QgsPointXY> &points )
const;
214 double measureLineProjected(
const QgsPointXY &p1,
double distance = 1,
double azimuth = M_PI_2,
QgsPointXY *projectedPoint
SIP_OUT =
nullptr )
const;
233 double measurePolygon(
const QVector<QgsPointXY> &points )
const;
266 static QString formatArea(
double area,
int decimals,
QgsUnitTypes::AreaUnit unit,
bool keepBaseUnit =
false );
303 QgsPointXY computeSpheroidProject(
const QgsPointXY &p1,
double distance = 1,
double azimuth = M_PI_2 )
const;
324 QVector<QVector<QgsPointXY> > geodesicLine(
const QgsPointXY &p1,
const QgsPointXY &p2,
double interval,
bool breakLine =
false )
const;
375 double computePolygonArea(
const QVector<QgsPointXY> &points )
const;
377 double computePolygonFlatArea(
const QVector<QgsPointXY> &points )
const;
383 void computeAreaInit()
const;
401 double mSemiMajor, mSemiMinor, mInvFlattening;
403 mutable std::unique_ptr< geod_geodesic > mGeod;
408 double measureLine(
const QgsCurve *curve )
const;
409 double measurePolygon(
const QgsCurve *curve )
const;
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.
DistanceUnit
Units of distance.
const QgsCoordinateReferenceSystem & crs
Contains parameters for an ellipsoid.