ProjectionBase Struct Reference

Abstract base class for individual projections. More...

#include <gpuProjections.h>

Inheritance diagram for ProjectionBase:

Public Types
typedef isce3::core::Vec3	Vec3

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

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

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

ProjectionBase()

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

forward()

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

forward_h()

__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

inverse()

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

pure virtual

Device function for transforming to LLH.

Parameters

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

inverse_h()

__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

_epsgcode

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 files:

• /home/runner/work/isce3/isce3/cxx/isce3/cuda/core/gpuProjections.h
• /home/runner/work/isce3/isce3/cxx/isce3/cuda/core/gpuProjections.cu