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This class defines Universal Transverse Mercator projections, also known as UTM projections. More...
#include <ilviews/maps/projection/unitmerc.h>
Public Member Functions | |
| IlvUniversalTransverseMercatorProjection (IlUShort zone=30) | |
Initializes an instance of the class IlvUniversalTransverseMercatorProjection and specifies the UTM zone. The ellipsoid is set to the WGS84 ellipsoid. More... | |
| IlvUniversalTransverseMercatorProjection (IlDouble lon) | |
Creates an instance of the IlvUniverseTransverseMercatorProjection and specifies the central meridian. More... | |
| IlUShort | getZone () const |
| Returns the UTM zone to which the projection applies. More... | |
| virtual IlBoolean | isSouth () const |
| Checks if projection is for applications portraying the southern hemisphere. More... | |
| virtual void | setLLCenter (IlDouble lon, IlDouble lat) |
| Specifies the central meridian and the central parallel (in radian) associated with the projection. More... | |
| virtual void | setScaleFactor (IlDouble k0) |
Sets the scale factor k0 applied to the central meridian. By default, the scale factor is 1. More... | |
| void | setSouth (IlBoolean south) |
| Sets a false northing for applications portraying the southern hemisphere. More... | |
| IlBoolean | setZone (IlUShort zone) |
| Sets the UTM zone to which the projection applies. More... | |
| virtual void | write (IlvOutputFile &) const |
| Saves the parameters of a projection to the specified output file. More... | |
 Public Member Functions inherited from IlvTransverseMercatorProjection | |
| IlvTransverseMercatorProjection (IlDouble latitudeOfTrueScale=0.) | |
This constructor initializes an instance of the class IlvTransverseMercatorProjection and sets the latitude of the true scale. More... | |
| IlDouble | getScaleFactor () const |
| Returns the scale factor applied to the central meridian. More... | |
| virtual IlvMapsError | setEllipsoid (const IlvEllipsoid &ellipsoid) |
| Sets the ellipsoid used for the projection. More... | |
| Public Member Functions inherited from IlvProjection | |
| virtual IlvProjection * | copy () const =0 |
| Returns a copy of the projection. It must be overridden in each subclass. More... | |
| IlvMapsError | forward (const IlvCoordinate &llIn, IlvCoordinate &xyOut) const |
| Converts a latitude and a longitude to Cartesian coordinates (x,y). More... | |
| IlvMapsError | forward (IlvCoordinate &x) const |
| This member function converts a latitude and a longitude to Cartesian coordinates. More... | |
| IlDouble | getCentralMeridian () const |
| Returns the central meridian of the projection. More... | |
| IlDouble | getCentralParallel () const |
| Returns the central parallel of the projection. More... | |
| virtual IlvProjectionClassInfo * | getClassInfo () const |
| Returns the class information for the projection. More... | |
| const IlvHorizontalDatum * | getDatum (void) const |
| Returns the horizontal datum used for the projection. More... | |
| const IlvEllipsoid * | getEllipsoid (void) const |
| Returns the ellipsoid used for the projection. More... | |
| IlvMapsError | getError () const |
Returns the status of the projection. If the projection is valid, the function returns IlvMapsError::NoError(), otherwise, it returns an error code. See the IlvMaps class to know how to interpret the error codes. More... | |
| IlDouble | getFalseEasting () const |
| Returns the false easting of the projection. More... | |
| IlDouble | getFalseNorthing () const |
| Returns the false northing of the projection. More... | |
| IlvProjectionInterface * | getInterface () |
| Returns the interface of the projection. More... | |
| IlvCoordinate | getLLCenter (void) const |
| Returns the central meridian and the central parallel associated with the projection (0-0 by default). More... | |
| IlvProjectionGeometricProperty | getProperty () const |
| Returns the geometric property of the projection. More... | |
| const IlvUnitConverter * | getUnitConverter () const |
| Returns the unit converter. More... | |
| IlvCoordinate | getXYOffset (void) const |
| Returns the false easting and the false northing of the projection. More... | |
| IlvMapsError | inverse (const IlvCoordinate &xyIn, IlvCoordinate &llOut) const |
| Converts the specified coordinate to a latitude and a longitude. More... | |
| IlvMapsError | inverse (IlvCoordinate &x) const |
Converts the IlvCoordinate representing Cartesian coordinates to a latitude and a longitude. More... | |
| IlBoolean | isBad () const |
| Checks for an inconsistent state of the projection. More... | |
| IlBoolean | isEllipsoidEnabled () const |
Returns IlTrue if non spherical ellipsoids can be used for the projection. More... | |
| IlBoolean | isGeocentric () const |
| Checks if the projection uses geocentric latitudes. More... | |
| IlBoolean | isInverseEnabled () const |
Returns IlTrue if the inverse function is supported by the projection. More... | |
| IlBoolean | isShared () const |
Returns IlTrue if the projection is shared. More... | |
| IlBoolean | isUsingLongitudeReduction () const |
Returns IlTrue if the projection uses range reduction for longitudes. More... | |
| void | lock () |
| Locks the projection. | |
| virtual IL_STDPREF ostream & | printPROJ4Descriptor (IL_STDPREF ostream &ostr, IlvMapsError *status=0) const |
| This virtual member function converts the projection to a string in the PROJ4 format. More... | |
| void | save (IlvOutputFile &outputFile) const |
Saves an instance of a subclass of IlvProjection to the specified output file. More... | |
| void | setCentralMeridian (IlDouble lon) |
| Sets the central meridian of the projection. More... | |
| void | setCentralParallel (IlDouble lat) |
| Sets the central parallel of the projection. More... | |
| virtual IlvMapsError | setDatum (const IlvHorizontalDatum *datum) |
| Sets the datum used for the projection. More... | |
| void | setFalseEasting (IlDouble falseEasting) |
| Sets the false easting of the projection. More... | |
| void | setFalseNorthing (IlDouble falseNorthing) |
| Sets the false northing of the projection. More... | |
| void | setGeocentric (IlBoolean geoc) |
| Specifies whether the projection uses geocentric or geodetic latitudes. More... | |
| void | setShared () |
| Specifies that the projection will be shared. More... | |
| void | setUnitConverter (const IlvUnitConverter &converter) |
| Sets the unit converter of the projection. The default unit is meters. More... | |
| void | setUsingLongitudeReduction (IlBoolean use) |
| Specifies whether the projection uses longitude reduction. More... | |
| void | setXYOffset (IlDouble x0, IlDouble y0) |
| Specifies the false easting and the false northing. More... | |
| void | unLock () |
| Unlocks the object. More... | |
Additional Inherited Members | |
| Static Public Member Functions inherited from IlvProjection | |
| static IlvProjectionClassInfo * | ClassInfo () |
| Returns the class information of the class. More... | |
| static IlvClassInfo ** | ClassInfoRef () |
| Returns the address of the class information of the class. More... | |
| static IlvMapsError | InputError () |
| Returned if the coordinates passed to the forward function are not in a valid range for radian angles. | |
| static IlvMapsError | InvalidEllipsoidError () |
| Returned if you attempt to set a non spherical ellipsoid to a projection that does not support non spherical ellipsoids. | |
| static IlvProjection * | Load (IlvInputFile &inputFile) |
| Loads a projection from the specified file. More... | |
| static IlvProjection * | PROJ4ToIlvProjection (const char *PROJ4descriptor, IlvMapsError *status=0) |
| Creates the projection specified by proj4Descriptor. More... | |
| static IlvMapsError | ToleranceConditionError () |
| Returned when an internal projection computation fails. Some projections, however, can return more specific error codes in this case. | |
| static IlvMapsError | UnsupportedFeatureError () |
| Returned if an unsupported projection feature is requested, like inverse projection for a projection that does not support inverse projection. | |
| Protected Member Functions inherited from IlvTransverseMercatorProjection | |
| virtual IlvMapsError | eForward (IlvCoordinate &ll) const |
| Must be redefined in subclasses to implement the projection for a non spherical ellipsoid. More... | |
| virtual IlvMapsError | eInverse (IlvCoordinate &xy) const |
| Implements the inverse projection for a non spherical ellipsoid. More... | |
| virtual IlvMapsError | sForward (IlvCoordinate &ll) const |
| Must be redefined in subclasses to implement the projection for a sphere. More... | |
| virtual IlvMapsError | sInverse (IlvCoordinate &xy) const |
| Must be redefined in subclasses to implement the inverse projection for a sphere. More... | |
This class defines Universal Transverse Mercator projections, also known as UTM projections.
A UTM projection is a preconfigured form of the Transverse Mercator projection. It is generally used with non-spherical ellipsoids. UTM projections usually apply to 6-degree longitudinal strips extending from 84S to 80N. These strips are called UTM zones, with Zone 1 starting at 180W and Zone 60 ending at 180E. The central meridian is constrained to 6-degree intervals starting at 3 degrees. The projection automatically adjusts to the value nearest to the user's entry. A false easting of 500,000 meters is automatically added.
Universal Transverse Mercator Projection
Library: ilvmaps
| IlvUniversalTransverseMercatorProjection::IlvUniversalTransverseMercatorProjection | ( | IlUShort | zone = 30 | ) |
Initializes an instance of the class IlvUniversalTransverseMercatorProjection and specifies the UTM zone. The ellipsoid is set to the WGS84 ellipsoid.
| zone | The UTM zone. |
| IlvUniversalTransverseMercatorProjection::IlvUniversalTransverseMercatorProjection | ( | IlDouble | lon | ) |
Creates an instance of the IlvUniverseTransverseMercatorProjection and specifies the central meridian.
The ellipsoid is set to the WGS84 ellipsoid. The zone specified by the lon parameter is adjusted to the nearest UTM zone at the specified longitude.
| lon | The longitude. |
| IlUShort IlvUniversalTransverseMercatorProjection::getZone | ( | ) | const |
Returns the UTM zone to which the projection applies.
|
virtual |
Checks if projection is for applications portraying the southern hemisphere.
This member function returns IlTrue if the projection is set for applications portraying the southern hemisphere.
IlTrue if the projection is set for applications portraying the southern hemisphere IlFalse otherwise.
|
virtual |
Specifies the central meridian and the central parallel (in radian) associated with the projection.
By default, theses values are set to 0. This function is virtual because it can be overridden by subclasses of IlvProjection to update the internal parameters when the center is changed.
| lon | The central meridian in radian. |
| lat | The central parallel in radian. |
Reimplemented from IlvProjection.
|
virtual |
Sets the scale factor k0 applied to the central meridian. By default, the scale factor is 1.
| k0 | The scale factor applied to the central meridian. |
Reimplemented from IlvTransverseMercatorProjection.
| void IlvUniversalTransverseMercatorProjection::setSouth | ( | IlBoolean | south | ) |
Sets a false northing for applications portraying the southern hemisphere.
In applications portraying the southern hemisphere, this member function should be called with the Boolean argument south set to IlTrue, in which case a false northing of 10,000,000 meters is added.
| south | Specifies if a false northing is to be set. |
Sets the UTM zone to which the projection applies.
The zone index must be included in the range 1 to 60 because there are 60 UTM zones extending from west to east. Zone 1 extends from 180W to 174W. Zone 60 extends from 174E to 180E.
The function returns IlFalse if an invalid UTM zone is specified, and leaves the projection unchanged.
IlFalse if the UTM zone is invalid, IlTrue otherwise.
|
virtual |
Saves the parameters of a projection to the specified output file.
It must be overridden by subclasses of IlvProjection that need to save additional parameters. This function should not be directly called; use the save function instead.
| outputFile | The file to write the projection parameters to. |
Reimplemented from IlvTransverseMercatorProjection.
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