48 lines
1.3 KiB
C++
Executable File
48 lines
1.3 KiB
C++
Executable File
/**
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**
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** @RDE_HEADER@
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** Math const
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** $Id$
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** $HeadURL$
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** $Author$
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Hardware-Environment: Intel-PC
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** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
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**
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** Language ........: C++ 11
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Author ...........: Jörg Turla, SPD G, Tel. 3132
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Notes .........:
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**
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** 04.12.2015, JT : First edition
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**
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** -----------------------------------------------------------------------------------------------
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*/
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#pragma once
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#include <cmath>
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namespace MathConst
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{
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constexpr double pi = M_PI;
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constexpr double pi_two = pi * 2;
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constexpr double pi_half = M_PI_2;
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constexpr double pi_quater = M_PI_4;
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constexpr double EarthRadius = 6371001.0;
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constexpr double WGS84_Major_a = 6378137.0; // WGS84 Ellipsoid, a value (Radius am Äquator, große Halbachse)
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constexpr double WGS84_Minor_b = 6378137.0*( 1.0 - 1.0/298.257223563);
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constexpr double WGS84_SQR_EXC = ((WGS84_Major_a * WGS84_Major_a) - (WGS84_Minor_b * WGS84_Minor_b))/(WGS84_Major_a * WGS84_Major_a);
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} // namespace MathConst
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