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Added support for Mercator projection (the real one)

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This commit is contained in:
Martin Tůma 2018-05-13 00:40:03 +02:00
parent 2b421f3b63
commit be1c7fa4c2
5 changed files with 211 additions and 45 deletions
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6
gpxsee.pro
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@ -127,7 +127,8 @@ HEADERS += src/config.h \
src/data/nmeaparser.h \
src/data/oziparsers.h \
src/map/rectd.h \
src/map/geocentric.h
src/map/geocentric.h \
src/map/mercator.h
SOURCES += src/main.cpp \
src/common/coordinates.cpp \
src/common/rectc.cpp \
@ -222,7 +223,8 @@ SOURCES += src/main.cpp \
src/data/igcparser.cpp \
src/data/nmeaparser.cpp \
src/data/oziparsers.cpp \
src/map/geocentric.cpp
src/map/geocentric.cpp \
src/map/mercator.cpp
RESOURCES += gpxsee.qrc
TRANSLATIONS = lang/gpxsee_cs.ts \
lang/gpxsee_sv.ts \

90
src/map/geotiff.cpp
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@ -9,49 +9,51 @@
#define TIFF_SHORT 3
#define TIFF_LONG 4
#define ModelPixelScaleTag 33550
#define ModelTiepointTag 33922
#define ModelTransformationTag 34264
#define GeoKeyDirectoryTag 34735
#define GeoDoubleParamsTag 34736
#define ModelPixelScaleTag 33550
#define ModelTiepointTag 33922
#define ModelTransformationTag 34264
#define GeoKeyDirectoryTag 34735
#define GeoDoubleParamsTag 34736
#define GTModelTypeGeoKey 1024
#define GTRasterTypeGeoKey 1025
#define GeographicTypeGeoKey 2048
#define GeogGeodeticDatumGeoKey 2050
#define GeogPrimeMeridianGeoKey 2051
#define GeogAngularUnitsGeoKey 2054
#define GeogEllipsoidGeoKey 2056
#define GeogAzimuthUnitsGeoKey 2060
#define ProjectedCSTypeGeoKey 3072
#define ProjectionGeoKey 3074
#define ProjCoordTransGeoKey 3075
#define ProjLinearUnitsGeoKey 3076
#define ProjStdParallel1GeoKey 3078
#define ProjStdParallel2GeoKey 3079
#define ProjNatOriginLongGeoKey 3080
#define ProjNatOriginLatGeoKey 3081
#define ProjFalseEastingGeoKey 3082
#define ProjFalseNorthingGeoKey 3083
#define ProjFalseOriginLatGeoKey 3085
#define ProjCenterLongGeoKey 3088
#define ProjCenterLatGeoKey 3089
#define ProjScaleAtNatOriginGeoKey 3092
#define ProjScaleAtCenterGeoKey 3093
#define ProjAzimuthAngleGeoKey 3094
#define ProjRectifiedGridAngleGeoKey 3096
#define GTModelTypeGeoKey 1024
#define GTRasterTypeGeoKey 1025
#define GeographicTypeGeoKey 2048
#define GeogGeodeticDatumGeoKey 2050
#define GeogPrimeMeridianGeoKey 2051
#define GeogAngularUnitsGeoKey 2054
#define GeogEllipsoidGeoKey 2056
#define GeogAzimuthUnitsGeoKey 2060
#define ProjectedCSTypeGeoKey 3072
#define ProjectionGeoKey 3074
#define ProjCoordTransGeoKey 3075
#define ProjLinearUnitsGeoKey 3076
#define ProjStdParallel1GeoKey 3078
#define ProjStdParallel2GeoKey 3079
#define ProjNatOriginLongGeoKey 3080
#define ProjNatOriginLatGeoKey 3081
#define ProjFalseEastingGeoKey 3082
#define ProjFalseNorthingGeoKey 3083
#define ProjFalseOriginLatGeoKey 3085
#define ProjCenterLongGeoKey 3088
#define ProjCenterLatGeoKey 3089
#define ProjCenterEastingGeoKey 3090
#define ProjFalseOriginNorthingGeoKey 3091
#define ProjScaleAtNatOriginGeoKey 3092
#define ProjScaleAtCenterGeoKey 3093
#define ProjAzimuthAngleGeoKey 3094
#define ProjRectifiedGridAngleGeoKey 3096
#define ModelTypeProjected 1
#define ModelTypeGeographic 2
#define ModelTypeGeocentric 3
#define ModelTypeProjected 1
#define ModelTypeGeographic 2
#define ModelTypeGeocentric 3
#define CT_TransverseMercator 1
#define CT_ObliqueMercator 3
#define CT_Mercator 7
#define CT_LambertConfConic_2SP 8
#define CT_LambertConfConic_1SP 9
#define CT_LambertAzimEqualArea 10
#define CT_AlbersEqualArea 11
#define CT_TransverseMercator 1
#define CT_ObliqueMercator 3
#define CT_Mercator 7
#define CT_LambertConfConic_2SP 8
#define CT_LambertConfConic_1SP 9
#define CT_LambertAzimEqualArea 10
#define CT_AlbersEqualArea 11
#define IS_SET(map, key) \
@ -253,6 +255,8 @@ bool GeoTIFF::readKeys(TIFFFile &file, Ctx &ctx, QMap<quint16, Value> &kv) const
case ProjAzimuthAngleGeoKey:
case ProjRectifiedGridAngleGeoKey:
case ProjFalseOriginLatGeoKey:
case ProjCenterEastingGeoKey:
case ProjFalseOriginNorthingGeoKey:
if (!readGeoValue(file, ctx.values, entry.ValueOffset,
value.DOUBLE))
return false;
@ -327,7 +331,7 @@ Projection::Method GeoTIFF::method(QMap<quint16, Value> &kv)
case CT_ObliqueMercator:
return Projection::Method(9815);
case CT_Mercator:
return Projection::Method(1024);
return Projection::Method(9804);
case CT_LambertConfConic_2SP:
return Projection::Method(9802);
case CT_LambertConfConic_1SP:
@ -421,10 +425,14 @@ bool GeoTIFF::projectedModel(QMap<quint16, Value> &kv)
sp2 = NAN;
if (kv.contains(ProjFalseNorthingGeoKey))
fn = lu.toMeters(kv.value(ProjFalseNorthingGeoKey).DOUBLE);
else if (kv.contains(ProjFalseOriginNorthingGeoKey))
fn = lu.toMeters(kv.value(ProjFalseOriginNorthingGeoKey).DOUBLE);
else
fn = NAN;
if (kv.contains(ProjFalseEastingGeoKey))
fe = lu.toMeters(kv.value(ProjFalseEastingGeoKey).DOUBLE);
else if (kv.contains(ProjCenterEastingGeoKey))
fe = lu.toMeters(kv.value(ProjCenterEastingGeoKey).DOUBLE);
else
fe = NAN;

122
src/map/mercator.cpp Normal file
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@ -0,0 +1,122 @@
/*
* Based on libgeotrans with the following Source Code Disclaimer:
1. The GEOTRANS source code ("the software") is provided free of charge by
the National Imagery and Mapping Agency (NIMA) of the United States
Department of Defense. Although NIMA makes no copyright claim under Title 17
U.S.C., NIMA claims copyrights in the source code under other legal regimes.
NIMA hereby grants to each user of the software a license to use and
distribute the software, and develop derivative works.
2. Warranty Disclaimer: The software was developed to meet only the internal
requirements of the U.S. National Imagery and Mapping Agency. The software
is provided "as is," and no warranty, express or implied, including but not
limited to the implied warranties of merchantability and fitness for
particular purpose or arising by statute or otherwise in law or from a
course of dealing or usage in trade, is made by NIMA as to the accuracy and
functioning of the software.
3. NIMA and its personnel are not required to provide technical support or
general assistance with respect to the software.
4. Neither NIMA nor its personnel will be liable for any claims, losses, or
damages arising from or connected with the use of the software. The user
agrees to hold harmless the United States National Imagery and Mapping
Agency. The user's sole and exclusive remedy is to stop using the software.
5. NIMA requests that products developed using the software credit the
source of the software with the following statement, "The product was
developed using GEOTRANS, a product of the National Imagery and Mapping
Agency and U.S. Army Engineering Research and Development Center."
6. For any products developed using the software, NIMA requires a disclaimer
that use of the software does not indicate endorsement or approval of the
product by the Secretary of Defense or the National Imagery and Mapping
Agency. Pursuant to the United States Code, 10 U.S.C. Sec. 2797, the name of
the National Imagery and Mapping Agency, the initials "NIMA", the seal of
the National Imagery and Mapping Agency, or any colorable imitation thereof
shall not be used to imply approval, endorsement, or authorization of a
product without prior written permission from United States Secretary of
Defense.
*/
#include "ellipsoid.h"
#include "mercator.h"
Mercator::Mercator(const Ellipsoid *ellipsoid, double latitudeOrigin,
double longitudeOrigin, double falseEasting, double falseNorthing)
{
double es2;
double es3;
double es4;
double sin_olat;
_a = ellipsoid->radius();
_latitudeOrigin = deg2rad(latitudeOrigin);
_longitudeOrigin = deg2rad(longitudeOrigin);
if (_longitudeOrigin > M_PI)
_longitudeOrigin -= 2*M_PI;
_falseNorthing = falseNorthing;
_falseEasting = falseEasting;
_es = 2 * ellipsoid->flattening() - ellipsoid->flattening()
* ellipsoid->flattening();
_e = sqrt(_es);
sin_olat = sin(_latitudeOrigin);
_scaleFactor = 1.0 / (sqrt(1.e0 - _es * sin_olat * sin_olat)
/ cos(_latitudeOrigin));
es2 = _es * _es;
es3 = es2 * _es;
es4 = es3 * _es;
_ab = _es / 2.e0 + 5.e0 * es2 / 24.e0 + es3 / 12.e0 + 13.e0 * es4 / 360.e0;
_bb = 7.e0 * es2 / 48.e0 + 29.e0 * es3 / 240.e0 + 811.e0 * es4 / 11520.e0;
_cb = 7.e0 * es3 / 120.e0 + 81.e0 * es4 / 1120.e0;
_db = 4279.e0 * es4 / 161280.e0;
}
PointD Mercator::ll2xy(const Coordinates &c) const
{
double lon = deg2rad(c.lon());
double lat = deg2rad(c.lat());
double ctanz2;
double e_x_sinlat;
double delta_lon;
double tan_temp;
double pow_temp;
if (lon > M_PI)
lon -= 2*M_PI;
e_x_sinlat = _e * sin(lat);
tan_temp = tan(M_PI / 4.e0 + lat / 2.e0);
pow_temp = pow((1.e0 - e_x_sinlat) / (1.e0 + e_x_sinlat), _e / 2.e0);
ctanz2 = tan_temp * pow_temp;
delta_lon = lon - _longitudeOrigin;
if (delta_lon > M_PI)
delta_lon -= 2 * M_PI;
if (delta_lon < -M_PI)
delta_lon += 2 * M_PI;
return PointD(_scaleFactor * _a * delta_lon + _falseEasting,
_scaleFactor * _a * log(ctanz2) + _falseNorthing);
}
Coordinates Mercator::xy2ll(const PointD &p) const
{
double dx;
double dy;
double xphi;
double lat, lon;
dy = p.y() - _falseNorthing;
dx = p.x() - _falseEasting;
lon = _longitudeOrigin + dx / (_scaleFactor * _a);
xphi = M_PI / 2.e0 - 2.e0 * atan(1.e0 / exp(dy / (_scaleFactor * _a)));
lat = xphi + _ab * sin(2.e0 * xphi) + _bb * sin(4.e0 * xphi)
+ _cb * sin(6.e0 * xphi) + _db * sin(8.e0 * xphi);
if (lon > M_PI)
lon -= 2 * M_PI;
if (lon < -M_PI)
lon += 2 * M_PI;
return Coordinates(rad2deg(lon), rad2deg(lat));
}

29
src/map/mercator.h Normal file
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@ -0,0 +1,29 @@
#ifndef MERCATOR_H
#define MERCATOR_H
#include "ct.h"
class Ellipsoid;
class Mercator : public CT
{
public:
Mercator(const Ellipsoid *ellipsoid, double latitudeOrigin,
double longitudeOrigin, double falseEasting, double falseNorthing);
virtual CT *clone() const {return new Mercator(*this);}
virtual PointD ll2xy(const Coordinates &c) const;
virtual Coordinates xy2ll(const PointD &p) const;
private:
double _a, _es, _e;
double _latitudeOrigin;
double _longitudeOrigin;
double _falseNorthing;
double _falseEasting;
double _scaleFactor;
double _ab, _bb, _cb, _db;
};
#endif // MERCATOR_H

9
src/map/projection.cpp
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@ -1,4 +1,5 @@
#include "datum.h"
#include "mercator.h"
#include "webmercator.h"
#include "transversemercator.h"
#include "lambertconic.h"
@ -16,11 +17,11 @@ Projection::Method::Method(int id)
case 1024:
case 9801:
case 9802:
case 9804:
case 9807:
case 9815:
case 9820:
case 9822:
case 9841:
_id = id;
break;
default:
@ -36,7 +37,6 @@ Projection::Projection(const PCS *pcs) : _gcs(pcs->gcs()), _units(pcs->units()),
switch (pcs->method().id()) {
case 1024:
case 9841:
_ct = new WebMercator();
break;
case 9801:
@ -51,6 +51,11 @@ Projection::Projection(const PCS *pcs) : _gcs(pcs->gcs()), _units(pcs->units()),
setup.longitudeOrigin(), setup.falseEasting(),
setup.falseNorthing());
break;
case 9804:
_ct = new Mercator(ellipsoid, setup.latitudeOrigin(),
setup.longitudeOrigin(), setup.falseEasting(),
setup.falseNorthing());
break;
case 9807:
_ct = new TransverseMercator(ellipsoid, setup.latitudeOrigin(),
setup.longitudeOrigin(), setup.scale(), setup.falseEasting(),