54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
/*
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* (c) 2002-2016 Hannes Krueger
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* This file is part of the GPLIGC/ogie package
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*/
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#ifndef PROJECTION_H
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#define PROJECTION_H 1
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//definitions of usable projections:
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const int MERCATOR_MAX_LAT = 80;
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// cylindrical "platt" projection
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const unsigned int PROJ_CYL_PLATT = 1;
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const unsigned int PROJ_CYL_MERCATOR = 2;
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// laengentreu auf meridianen
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const unsigned int PROJ_CYL_NO1 = 3;
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// laengentreu auf meridianen und breitenkreisen (old default)
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const unsigned int PROJ_PSEUDO_CYL_NO1 = 4;
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class Projection {
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public:
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Projection();
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void set_center_lat (float lat) {center_lat = lat;}
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void set_center_lon (float lon) {center_lon = lon;}
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float get_center_lat (void) const {return center_lat;}
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float get_center_lon (void) const {return center_lon;}
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void set_projection (unsigned int p) {projection = p;}
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unsigned int get_projection (void) const {return projection;}
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void get_xy (float, float, float&, float&);
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void get_latlon (float, float, float&, float&);
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protected:
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float center_lat;
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float center_lon;
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unsigned int projection;
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float sphere_radius;
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float degree_dist;
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};
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#endif
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