isce3::cuda::core::ProjectionBase Struct Reference

Abstract base class for individual projections. More...

#include <gpuProjections.h>

Inheritance diagram for isce3::cuda::core::ProjectionBase:

Public Types
typedef isce3::core::Vec3	Vec3

Public Member Functions
CUDA_HOSTDEV	ProjectionBase (int code)
	Value constructor with EPSG code as input. More...
CUDA_HOST int	forward_h (const Vec3 &llh, Vec3 &xyz) const
	Host function for transforming from LLH. More...
virtual CUDA_DEV int	forward (const Vec3 &llh, Vec3 &xyz) const =0
	Device function for transform from LLH. More...
CUDA_HOST int	inverse_h (const Vec3 &xyz, Vec3 &llh) const
	Host function for transforming to LLH. More...
virtual CUDA_DEV int	inverse (const Vec3 &xyz, Vec3 &llh) const =0
	Device function for tranforming to LLH. More...

Public Attributes
isce3::core::Ellipsoid	ellipse
	Ellipsoid object for projections - currently only WGS84.
int	_epsgcode
	Type of projection system. More...

Detailed Description

Abstract base class for individual projections.

Internally, every derived class is expected to provide two functions. forward - To convert llh (radians) to expected projection system inverse - To convert expected projection system to llh (radians)

Constructor & Destructor Documentation

CUDA_HOSTDEV isce3::cuda::core::ProjectionBase::ProjectionBase ( int  code )

inline

Value constructor with EPSG code as input.

Ellipsoid is always initialized to standard WGS84 ellipse.

Member Function Documentation

virtual CUDA_DEV int isce3::cuda::core::ProjectionBase::forward ( const Vec3 &  llh, Vec3 &  xyz  ) const

pure virtual

Device function for transform from LLH.

Parameters

[in]	llh	Lon/Lat/Height - Lon and Lat are in radians
[out]	xyz	Coordinates in specified coordinate system

Implemented in isce3::cuda::core::CEA, isce3::cuda::core::PolarStereo, isce3::cuda::core::UTM, isce3::cuda::core::Geocent, and isce3::cuda::core::LonLat.

CUDA_HOST int isce3::cuda::core::ProjectionBase::forward_h	(	const Vec3 &	llh,
		Vec3 &	xyz
	)		const

Host function for transforming from LLH.

This is similar to fwd or fwd3d in PROJ.4

Parameters

[in]	llh	Lon/Lat/Height - Lon and Lat are in radians
[out]	xyz	Coordinates in specified projection system

virtual CUDA_DEV int isce3::cuda::core::ProjectionBase::inverse ( const Vec3 &  xyz, Vec3 &  llh  ) const

pure virtual

Device function for tranforming to LLH.

Parameters

[in]	xyz	Coordinates in specified projection system
[out]	llh	Lon/Lat/Height - Lon and Lat are in radians

Implemented in isce3::cuda::core::CEA, isce3::cuda::core::PolarStereo, isce3::cuda::core::UTM, isce3::cuda::core::Geocent, and isce3::cuda::core::LonLat.

CUDA_HOST int isce3::cuda::core::ProjectionBase::inverse_h	(	const Vec3 &	xyz,
		Vec3 &	llh
	)		const

Host function for transforming to LLH.

This is similar to inv or inv3d in PROJ.4

Parameters

[in]	xyz	Coordinates in specified projection system
[out]	llh	Lon/Lat/Height - Lon and Lat are in radians

Member Data Documentation

int isce3::cuda::core::ProjectionBase::_epsgcode

Type of projection system.

This can be used to check if projection systems are equal Private member and should not be modified after initialization

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The documentation for this struct was generated from the following file:

• isce/cxx/isce3/cuda/core/gpuProjections.h