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#!/usr/bin/env python
###############################################################################
# $Id$
#
# Project: PROJ
# Purpose: Generate ITRF2020 to ITRFxxxx Helmert transformations (geocentric
# coordinates) from EPSG database.
# Author: Even Rouault <even.rouault at spatialys.com>
#
###############################################################################
# Copyright (c) 2024, Even Rouault <even.rouault at spatialys.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################
import subprocess
def change_sign(param):
tokens = param.split("=")
if tokens[1] == "0":
return None
if tokens[1][0] == '-':
return tokens[0] + "=" + tokens[1][1:]
else:
return tokens[0] + "=-" + tokens[1]
def generate(source, dest):
process = subprocess.Popen(f"bin/projinfo -s {source} -t {dest} --single-line -o PROJ -q", shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, _ = process.communicate()
steps = out.decode('ASCII').split('+step')
assert len(steps) == 8
txt = steps[4]
txt = txt[:-1]
assert txt.startswith(" +inv +proj=helmert")
txt = txt.replace(" +inv ", "")
new_tokens = []
for token in txt.split(" "):
if token.startswith("+x=") or token.startswith("+y=") or token.startswith("+z=") or \
token.startswith("+dx=") or token.startswith("+dy=") or token.startswith("+dz=") or \
token.startswith("+rx=") or token.startswith("+ry=") or token.startswith("+rz=") or \
token.startswith("+drx=") or token.startswith("+dry=") or token.startswith("+drz=") or \
token.startswith("+s=") or token.startswith("+ds="):
new_token = change_sign(token)
if new_token:
new_tokens.append(new_token)
elif token.startswith("+proj=") or token.startswith("+t_epoch=") or token.startswith("+convention="):
new_tokens.append(token)
else:
assert False, (txt, token)
print("<" + dest + "> " + (" ".join(new_tokens)))
for dest in ("ITRF2014", "ITRF2008", "ITRF2005", "ITRF2000", "ITRF97", "ITRF96",
"ITRF94", "ITRF93", "ITRF92", "ITRF91", "ITRF90", "ITRF89", "ITRF88"):
generate("ITRF2020", dest)
print("")
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