mirror of
https://github.com/OpenSpace/OpenSpace.git
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Alexander Bock
54 lines
2.8 KiB
C
54 lines
2.8 KiB
C
/******************************************************************************
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* $Id: ogr_geo_utils.h 770dbf0162f10fe7160a99c42d90bd0de57736c7 2017-05-31 21:29:09Z Even Rouault $
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*
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* Project: X-Plane aeronautical data reader
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* Purpose: Definition of geo-computation functions
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* Author: Even Rouault, even dot rouault at mines dash paris dot org
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*
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******************************************************************************
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* Copyright (c) 2008, Even Rouault <even dot rouault at mines-paris dot org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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****************************************************************************/
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#ifndef OGR_GEO_UTILS_H_INCLUDED
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#define OGR_GEO_UTILS_H_INCLUDED
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/** The following functions provide computations based on great-circle/
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* orthodromic path, on a sphere with a radius of ~6366707 m.
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* The computations are not necessarily implemented in a very accurate/
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* stable way, and shouldn't be used for points that are too close (less than
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* one meter).
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* They are good enough for example to compute the coordinates of the polygon
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* for an airport runway, from its extreme points, track and length.
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*/
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double OGR_GreatCircle_Distance(double dfLatA_deg, double dfLonA_deg,
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double dfLatB_deg, double dfLonB_deg);
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double OGR_GreatCircle_InitialHeading(double dfLatA_deg, double dfLonA_deg,
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double dfLatB_deg, double dfLonB_deg);
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/* such as ExtendPosition(A, Distance(A,B), InitialHeading(A,B)) ~= B */
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int OGR_GreatCircle_ExtendPosition(double dfLatA_deg, double dfLonA_deg,
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double dfDistance, double dfHeadingInA,
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double* pdfLatB_deg, double* pdfLonB_deg);
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#endif /* ndef OGR_GEO_UTILS_H_INCLUDED */
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