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| 1 | + |
| 2 | +class QgsDistanceArea |
| 3 | +{ |
| 4 | +%TypeHeaderCode |
| 5 | +#include <qgsdistancearea.h> |
| 6 | +%End |
| 7 | + |
| 8 | + public: |
| 9 | + |
| 10 | + //! Constructor |
| 11 | + QgsDistanceArea(); |
| 12 | + |
| 13 | + //! Destructor |
| 14 | + ~QgsDistanceArea(); |
| 15 | + |
| 16 | + //! sets whether coordinates must be projected to ellipsoid before measuring |
| 17 | + void setProjectionsEnabled(bool flag); |
| 18 | + |
| 19 | + //! returns projections enabled flag |
| 20 | + bool projectionsEnabled(); |
| 21 | + |
| 22 | + //! sets source spatial reference system (by QGIS SRS) |
| 23 | + void setSourceSRS(long srsid); |
| 24 | + |
| 25 | + //! returns source spatial reference system |
| 26 | + long sourceSRS(); |
| 27 | + //! What sort of coordinate system is being used? |
| 28 | + bool geographic(); |
| 29 | + |
| 30 | + //! sets ellipsoid by its acronym |
| 31 | + bool setEllipsoid(const QString& ellipsoid); |
| 32 | + |
| 33 | + //! returns ellipsoid's acronym |
| 34 | + const QString& ellipsoid(); |
| 35 | + |
| 36 | + //! returns ellipsoid's semi major axis |
| 37 | + double ellipsoidSemiMajor(); |
| 38 | + //! returns ellipsoid's semi minor axis |
| 39 | + double ellipsoidSemiMinor(); |
| 40 | + //! returns ellipsoid's inverse flattening |
| 41 | + double ellipsoidInvFlattening(); |
| 42 | + |
| 43 | + //! general measurement (line distance or polygon area) |
| 44 | + double measure(QgsGeometry* geometry); |
| 45 | + |
| 46 | + //! measures line with more segments |
| 47 | + // TODO wrap double measureLine(const std::vector<QgsPoint>& points); |
| 48 | + |
| 49 | + //! measures line with one segment |
| 50 | + double measureLine(const QgsPoint& p1, const QgsPoint& p2); |
| 51 | + |
| 52 | + //! measures polygon area |
| 53 | + // TODO wrap double measurePolygon(const std::vector<QgsPoint>& points); |
| 54 | + |
| 55 | + //! compute bearing - in radians |
| 56 | + double getBearing(const QgsPoint& p1, const QgsPoint& p2); |
| 57 | + |
| 58 | + static QString textUnit(double value, int decimals, QGis::units u, bool isArea); |
| 59 | + |
| 60 | +}; |
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