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86 lines
2.6 KiB
Plaintext
86 lines
2.6 KiB
Plaintext
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class QgsDistanceArea
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{
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%TypeHeaderCode
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#include <qgsdistancearea.h>
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%End
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public:
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//! Constructor
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QgsDistanceArea();
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//! Destructor
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~QgsDistanceArea();
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//! Copy constructor
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QgsDistanceArea(const QgsDistanceArea & origDA );
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//! Assignment operator
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operator=(const QgsDistanceArea & origDA );
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//! sets whether coordinates must be projected to ellipsoid before measuring
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void setEllipsoidalMode(bool flag);
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void setProjectionsEnabled(bool flag) /Deprecated/;
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//! returns projections enabled flag
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bool ellipsoidalEnabled();
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bool hasCrsTransformEnabled() /Deprecated/;
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//! sets source spatial reference system (by QGIS CRS)
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void setSourceCrs(long srsid);
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//! sets source spatial reference system (by EpsgCrsId)
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// @deprecated use setSourceAuthid()
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void setSourceEpsgCrsId(long epsgId) /Deprecated/;
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//! sets source spatial reference system by authid
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void setSourceAuthId( QString authid );
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//! returns source spatial reference system
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long sourceCrs();
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//! What sort of coordinate system is being used?
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bool geographic();
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//! sets ellipsoid by its acronym
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bool setEllipsoid(const QString& ellipsoid);
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//! Sets ellipsoid by supplied radii
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// Inverse flattening is calculated with invf = a/(a-b)
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bool setEllipsoid( double semiMajor, double semiMinor );
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//! returns ellipsoid's acronym
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const QString& ellipsoid();
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//! returns ellipsoid's semi major axis
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double ellipsoidSemiMajor();
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//! returns ellipsoid's semi minor axis
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double ellipsoidSemiMinor();
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//! returns ellipsoid's inverse flattening
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double ellipsoidInverseFlattening();
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//! general measurement (line distance or polygon area)
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double measure(QgsGeometry* geometry);
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//! measurement perimater of polygon
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double measurePerimeter(QgsGeometry* geometry);
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//! measures line with more segments
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double measureLine(const QList<QgsPoint>& points);
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//! measures line with one segment
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double measureLine(const QgsPoint& p1, const QgsPoint& p2);
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//! measures polygon area
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double measurePolygon(const QList<QgsPoint>& points);
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//! compute bearing - in radians
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double bearing(const QgsPoint& p1, const QgsPoint& p2);
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static QString textUnit( double value, int decimals, QGis::UnitType u, bool isArea, bool keepBaseUnit = false );
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//! Helper for conversion between physical units
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void convertMeasurement( double &measure, QGis::UnitType &measureUnits, QGis::UnitType displayUnits, bool isArea );
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};
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