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Ref T773, cache ground elevations for "on ground" planes separately

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Rational:

* Those values represent taxiways and runways
* we cache those longer and keep more

It is much more likely we need/can use these values
This commit is contained in:
Klaus Basan
2020-02-18 00:45:47 +01:00
committed by Mat Sutcliffe
parent b128d40342
commit 33b1e26460
8 changed files with 113 additions and 43 deletions
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29
src/blackmisc/geo/coordinategeodeticlist.cpp
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@@ -7,11 +7,15 @@
*/
#include "coordinategeodeticlist.h"
#include "math/mathutils.h"
#include <QJsonValue>
#include <QString>
#include <QtGlobal>
using namespace BlackMisc::Math;
using namespace BlackMisc::PhysicalQuantities;
namespace BlackMisc
{
namespace Geo
@@ -22,5 +26,30 @@ namespace BlackMisc
CCoordinateGeodeticList::CCoordinateGeodeticList(const CSequence<CCoordinateGeodetic> &other) :
CSequence<CCoordinateGeodetic>(other)
{ }
CElevationPlane CCoordinateGeodeticList::averageGeodeticHeight(const CCoordinateGeodetic &reference, const CLength &range, const CLength &maxDeviation, int minValues) const
{
if (this->size() < minValues) { return CElevationPlane::null(); } // no change to succeed
QList<double> valuesInFt;
int count = 0;
for (const CCoordinateGeodetic &coordinate : *this)
{
if (!coordinate.hasMSLGeodeticHeight()) { continue; }
if (!coordinate.isWithinRange(reference, range)) { continue; }
const double elvFt = coordinate.geodeticHeight().value(CLengthUnit::ft());
valuesInFt.push_back(elvFt);
count++;
if (count > 5 && valuesInFt.size() > 3 * minValues) { break; }
}
if (count < minValues) { return CElevationPlane::null(); }
const double MaxDevFt = maxDeviation.value(CLengthUnit::ft());
const QPair<double, double> elvStdDevMean = CMathUtils::standardDeviationAndMean(valuesInFt);
if (elvStdDevMean.first > MaxDevFt) { return CElevationPlane::null(); }
return CElevationPlane(reference, elvStdDevMean.second, CElevationPlane::singlePointRadius());
}
} // namespace
} // namespace

5
src/blackmisc/geo/coordinategeodeticlist.h
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@@ -11,8 +11,10 @@
#ifndef BLACKMISC_GEO_COORDINATEGEODETICLIST_H
#define BLACKMISC_GEO_COORDINATEGEODETICLIST_H
#include "elevationplane.h"
#include "coordinategeodetic.h"
#include "geoobjectlist.h"
#include "blackmisc/blackmiscexport.h"
#include "blackmisc/collection.h"
#include "blackmisc/json.h"
@@ -43,6 +45,9 @@ namespace BlackMisc
//! Construct from a base class object.
CCoordinateGeodeticList(const CSequence<CCoordinateGeodetic> &other);
//! Average height within range and having an height
CElevationPlane averageGeodeticHeight(const CCoordinateGeodetic &reference, const PhysicalQuantities::CLength &range, const PhysicalQuantities::CLength &maxDeviation = PhysicalQuantities::CLength(1.0, PhysicalQuantities::CLengthUnit::m()), int minValues = 3) const;
};
} //namespace
} // namespace