Module transformations 

Ports of PROJ src/transformations/: helmert, molodensky, affine, vertoffset, and grid-based transforms: hgridshift, vgridshift, xyzgridshift, gridshift, tinshift, deformation, defmodel. Each submodule exposes a new(&TransParams) -> ProjResult<TransBuild> constructor.

Modules

affine

affine and geogoffset transformations.

defmodel

Deformation model (defmodel) — port of PROJ 9.8.0 src/transformations/defmodel.cpp and the header-only engine defmodel.hpp / defmodel_impl.hpp.

deformation

Kinematic velocity-grid deformation (deformation) — port of PROJ src/transformations/deformation.cpp.

gridshift

Generic grid shift (gridshift) — port of PROJ 9.8.0 generic gridshift. Detects the grid format from raw bytes (NTv2, GTX, GeoTIFF) and applies the appropriate horizontal, vertical, or 3-D shift. Acts as a dispatcher.

helmert

helmert and molobadekas datum transformations.

helmert_batch

Batch 7-parameter Helmert transformation and least-squares parameter estimation.

hgridshift

Horizontal grid shift (hgridshift) — port of PROJ src/transformations/hgridshift.cpp.

horner

Horner polynomial transformation — ported from PROJ 9.8.0 src/transformations/horner.cpp.

molodensky

molodensky (and abridged Molodensky) datum-shift transformation.

tinshift

TIN-based coordinate shift (tinshift) — port of PROJ src/transformations/tinshift.cpp. Reads a PROJ triangulation_file JSON grid and interpolates coordinate shifts using barycentric interpolation within triangles of an irregular triangulated network.

vertoffset

vertoffset transformation (“Vertical Offset and Slope”).

vgridshift

Vertical grid shift (vgridshift) — port of PROJ src/transformations/vgridshift.cpp.

xyzgridshift

XYZ grid shift (xyzgridshift) — port of PROJ src/transformations/xyzgridshift.cpp.