Package pyrdnap

A pure Python implementation of the 2018 v220627 version of Netherlands' RD NAP specification to convert between GRS80 (ETRS89) geodetic lat-, longitudes and height and local RijksDriehoeksmeeting (RD) coordinates and Normaal Amsterdams Peil (NAP) quasi-geoid-height.

The results of both pyrdnap transformer classes RDNAP2018v1 and RDNAP2018v2 have been formally validated and PyRDNAP has been certified to carry the trademark RDNAPTRANS(tm).

See module pyrdnap.rdnap2018 for further information, usage and implementation details.

See modules pyrdnap.v1grid and pyrdnap.v2grid for the RDNAPTRANS(tm)2018_v220627 grid files, each the original, unmodified ASCII .txt but compressed as .txt.zip.

See function pyrdnap.validation3 for .../Z001_ETRSandRDNAP.txt test set details.

See files testresults/v1_..._round_trips.txt for "round-trip" (forward plus reverse) test results of the RDNAP2018v1 transformer, especially the final, summary lines in each file.

Version: 26.06.26

Submodules

pyrdnap.__main__: Run some RD NAP 2018 forward or reverse conversion examples or run an RDNAPTRANS(tm)2018_v220627 or NSGI test set in "round-trip" fashion.
pyrdnap.__pygeodesy: (INTERNAL) pyrdnap access to some private pygeodesy attributes.
pyrdnap.rd0: (INTERNAL) RijksDriehoeksmeting _RD and reference _RD0 constants and classes RDNAP7Tuple and LqRD.
pyrdnap.rdnap2018: Main classes RDNAP2018v1 and RDNAP2018v2 follow variant 1 respectively variant 2 of the RDNAPTRANS(tm)2018_v220627 specification.
pyrdnap.v1grid: Variant 1 grids.
pyrdnap.v2grid: Variant 2 grids.
pyrdnap.v_grids: (INTERNAL) RDNAPTRANS(tm)2018_v220627 v#grid utilities.
pyrdnap.v_self: Function validation3 to run the RDNAPTRANS(tm)2018_v220627 self-validation test set .../Z001_ETRS89andRDNAP.txt obtainable from NSGI.NL after registration.

Classes
	Bounds4Tuple 4-Tuple `(latS, lonW, latN, lonE)` with the bounds' lower-left `(LatS, LowW)` and upper-right `(latN, lonE)` corner lat- and longitudes.
	Datum Ellipsoid and transform parameters for an earth model.
	Ellipsoid Ellipsoid with equatorial and polar radii, flattening, inverse flattening and other, often used, cached attributes, supporting oblate and prolate ellipsoidal and spherical earth models.
	LatLon2Tuple 2-Tuple `(lat, lon)` in `degrees90` and `degrees180`.
	LatLon3Tuple 3-Tuple `(lat, lon, height)` in `degrees90`, `degrees180` and `meter`, conventionally.
	LatLon4Tuple 4-Tuple `(lat, lon, height, datum)` in `degrees90`, `degrees180`, `meter` and `Datum`.
	LqRD Like pygeodesy.LqRD but with methods `forward` and `reverse` returning an RDNAP7Tuple with `NAPh` replaced by local `z`, the perpendicular distance to the local tangent plane (LTP).
	PhiLam2Tuple 2-Tuple `(phi, lam)` with latitude `phi` in `radians[PI_2]` and longitude `lam` in `radians[PI]`.
	PhiLam3Tuple 3-Tuple `(phi, lam, height)` with latitude `phi` in `radians[PI_2]`, longitude `lam` in `radians[PI]` and `height` in `meter`.
	PhiLam4Tuple 4-Tuple `(phi, lam, height, datum)` with latitude `phi` in `radians[PI_2]`, longitude `lam` in `radians[PI]`, `height` in `meter` and `Datum`.
	RDNAP2018v1 Transformer implementing `variant 1` of the RDNAPTRANS(tm)2018_v220627 specification.
	RDNAP2018v2 Transformer implementing `variant 2` of the RDNAPTRANS(tm)2018_v220627 specification.
	RDNAP7Tuple 7-Tuple `(RDx, RDy, NAPh, lat, lon, height, datum)` with local `RDx`, `RDy` and `NAPh` quasi-geoid_height, geodetic `lat`, `lon`, `height` and `datum` with `lat` and `lon` in `degrees` and with `RDx`, `RDy`, `NAPh` and `height` in `meter`, conventionally.
	RDNAPError Error raised for `RD`, `NAP`, unzip and other issues.
	Similarity Similarity transformation.
	Vector2Tuple 2-Tuple `(x, y)` of (geocentric) components, each in `meter` or the same `units`.
	Vector3Tuple 3-Tuple `(x, y, z)` of (geocentric) components, all in `meter` or the same `units`.

Functions

machine()
Return standard platform.machine, but distinguishing Intel native from Intel emulation on Apple Silicon (on macOS only).

validation3(self_txt, R, all_=False, in_out=True, _print=None, _printest=None)
Run the RDNAPTRANS(tm)2018_v220627 self-validation test set.

Variables
	pyrdnap_abspath = `'..../PyRDNA...`
	Datums = `Datums.Sphere: Datum(name='Sphere', ellipsoid=Ellipso...`
	Ellipsoids = `Ellipsoids.Sphere: Ellipsoid(name='Sphere', a=637...`

Function Details

machine()

Return standard platform.machine, but distinguishing Intel native from Intel emulation on Apple Silicon (on macOS only).

Returns:: Machine 'arm64' for Apple Silicon native, 'x86_64' for Intel native, "arm64_x86_64" for Intel emulation, etc. (str with commas replaced by underscores).

validation3 (self_txt, R, all_=False, in_out=True, _print=None, _printest=None)

Run the RDNAPTRANS(tm)2018_v220627 self-validation test set.

Arguments:

self_txt - Path of the file containing the self-validation test set (str, .../Z001_ETRS89andRDNAP.txt).
R - An RDNAP2018v# transformer (RDNAP2018v1 or RDNAP2018v2 instance).
all_ - If True print all tests and test results, otherwise print only failing tests (bool).
in_out - If True test only points inside the RD region, if False only points outside (bool).
_print - A Python 3+ print-like callable or None to not print the header and the final, summary lines.
_printest - A Python 3+ print-like callable or None to not print all_ in_out tests or only the failing ones.

Returns:

3-Tuple (failed, total, in_outside) with the number of FAILED tests, the total number of tests and the number of points in_out the RD region.

Variables Details

pyrdnap_abspath

Value:

'..../PyRDNAP/pyrdnap'

Datums

Value:

Datums.Sphere: Datum(name='Sphere', ellipsoid=Ellipsoids.Sphere, trans
form=Transforms.WGS84),
Datums.NAD83: Datum(name='NAD83', ellipsoid=Ellipsoids.GRS80, transfor
m=Transforms.NAD83),
Datums.OSGB36: Datum(name='OSGB36', ellipsoid=Ellipsoids.Airy1830, tra
nsform=Transforms.OSGB36),
Datums.WGS84: Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transfor
m=Transforms.WGS84),
...

Ellipsoids

Value:

Ellipsoids.Sphere: Ellipsoid(name='Sphere', a=6371008.771415, f=0, f_=
0, b=6371008.771415),
Ellipsoids.GRS80: Ellipsoid(name='GRS80', a=6378137, f=0.00335281, f_=
298.2572221, b=6356752.31414035),
Ellipsoids.WGS84: Ellipsoid(name='WGS84', a=6378137, f=0.00335281, f_=
298.25722356, b=6356752.31424518),
Ellipsoids.Airy1830: Ellipsoid(name='Airy1830', a=6377563.396, f=0.003
34085, f_=299.3249646, b=6356256.90923729)