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authorEven Rouault <even.rouault@spatialys.com>2019-12-17 20:58:35 +0100
committerEven Rouault <even.rouault@spatialys.com>2019-12-17 20:58:35 +0100
commitde6a04d8d600df2a0ac5896c5b82f243b5f8586c (patch)
tree6783282a3910c1149afa3e5555bdc2ea9988a2c8 /dk_sdfe/DK
parent224fc83db04262c3fce858526998a0de5930203f (diff)
downloadPROJ-data-de6a04d8d600df2a0ac5896c5b82f243b5f8586c.tar.gz
PROJ-data-de6a04d8d600df2a0ac5896c5b82f243b5f8586c.zip
Add non-grids DK, FO and NKG resource files
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+#------------------------------------------------------------------------------------------------------
+#
+# PROJ implementations of current and legacy Danish coordinate systems
+#
+#------------------------------------------------------------------------------------------------------
+#
+# This file is Work-In-Progress, and should not be used without great testing care. It is
+# currently provided for informational and testing purposes, but will in due course become
+# the official definition and implementation of transformations to and from Danish systems.
+#
+# Revision history:
+# -----------------
+#
+# 2017-09-?? Initial setup.
+# Kristian Evers <kreve@sdfe.dk>
+#
+# 2017-11-03 Formal definitions of legacy systems,
+# New datum naming structure
+# Check up on all polynomial transformations.
+# Karsten Engsager, Thomas Knudsen <thokn@sdfe.dk>
+#
+# 2017-11-08 Clean up, introduce _TC32_TD32, add descriptions
+# Thomas Knudsen <thokn@sdfe.dk>
+#
+# 2017-12-08 Introduce the Femerbelt system, the Storstrom
+# projection, and a number of seldom-used legacy
+# systems.
+# Karsten Engsager, Thomas Knudsen <thokn@sdfe.dk>
+#
+# 2018-02-21 Check-up, streamline built-in self-tests, add a
+# number of comments and descriptions, preparing
+# for PROJ 5.0.0 release.
+# Thomas Knudsen <thokn@sdfe.dk>
+#
+#------------------------------------------------------------------------------------------------------
+
+
+<metadata> +version=1.0.0 +origin=SDFE +lastupdate=2018-02-26
+
+
+#------------------------------------------------------------------------------------------------------
+# Vertical datums
+#------------------------------------------------------------------------------------------------------
+<DVR90> proj=vgridshift grids=dvr90.gtx # current
+<DNN> proj=vgridshift grids=dnn.gtx # historical
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# UTM ETRS89: The primary system for mapping
+#------------------------------------------------------------------------------------------------------
+<UTM32N> proj=utm zone=32 ellps=GRS80 units=m no_defs
+<UTM33N> proj=utm zone=33 ellps=GRS80 units=m no_defs
+
+<UTM32N_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:UTM32N
+<UTM33N_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:UTM33N
+
+<UTM32N_DNN> proj=pipeline step init=DK:DNN step init=DK:UTM32N
+<UTM33N_DNN> proj=pipeline step init=DK:DNN step init=DK:UTM33N
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:UTM32N
+tolerance 0.1 mm
+accept 12 55
+expect 691875.6321 6098907.8250
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------------------------------
+# DKTM ETRS89: Used for construction tasks, where a scale factor close to unity is important
+#------------------------------------------------------------------------------------------------------
+<DKTM1> proj=etmerc lat_0=0 lon_0=9 k=0.99998 x_0=200000 y_0=-5000000 ellps=GRS80 units=m no_defs
+<DKTM2> proj=etmerc lat_0=0 lon_0=10 k=0.99998 x_0=400000 y_0=-5000000 ellps=GRS80 units=m no_defs
+<DKTM3> proj=etmerc lat_0=0 lon_0=11.75 k=0.99998 x_0=600000 y_0=-5000000 ellps=GRS80 units=m no_defs
+<DKTM4> proj=etmerc lat_0=0 lon_0=15 k=1 x_0=800000 y_0=-5000000 ellps=GRS80 units=m no_defs
+
+<DKTM1_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:DKTM1
+<DKTM2_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:DKTM2
+<DKTM3_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:DKTM3
+<DKTM4_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:DKTM4
+
+<DKTM1_DNN> proj=pipeline step init=DK:DNN step init=DK:DKTM1
+<DKTM2_DNN> proj=pipeline step init=DK:DNN step init=DK:DKTM2
+<DKTM3_DNN> proj=pipeline step init=DK:DNN step init=DK:DKTM3
+<DKTM4_DNN> proj=pipeline step init=DK:DNN step init=DK:DKTM4
+
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Kp2000 ETRS89: A predecessor to DKTM (see above). Kp2000 was never in widespread use.
+#------------------------------------------------------------------------------------------------------
+<KP2000B> proj=etmerc lat_0=0 lon_0=15 k=1 x_0=900000 y_0=0 ellps=GRS80 units=m no_defs
+<KP2000J> proj=etmerc lat_0=0 lon_0=9.5 k=0.99995 x_0=200000 y_0=0 ellps=GRS80 units=m no_defs
+<KP2000S> proj=etmerc lat_0=0 lon_0=12 k=0.99995 x_0=500000 y_0=0 ellps=GRS80 units=m no_defs
+
+<KP2000B_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:KP2000B
+<KP2000J_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:KP2000J
+<KP2000S_DVR90> proj=pipeline step init=DK:DVR90 step init=DK:KP2000S
+
+<KP2000B_DNN> proj=pipeline step init=DK:DNN step init=DK:KP2000B
+<KP2000J_DNN> proj=pipeline step init=DK:DNN step init=DK:KP2000J
+<KP2000S_DNN> proj=pipeline step init=DK:DNN step init=DK:KP2000S
+
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Storstrom Bridge Map Projection: lon_0=1152nt
+#------------------------------------------------------------------------------------------------------
+<SSBKP> proj=etmerc ellps=GRS80
+ lat_0=0 lon_0=11.86666666666666666667
+ x_0=40000 y_0=-6013000
+ k=1 units=m no_defs
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Danish Mercator ETRS89 lat_0=56 x_0=500000 -> y_0=-3716499.0435458627
+#------------------------------------------------------------------------------------------------------
+<DM> proj=merc lat_ts=56 lon_0=9 x_0=500000 y_0=-3716499.0435458627 ellps=GRS80 no_defs
+<DMRC> DK:DM
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:DM
+tolerance 0.1 mm
+accept 12 55
+expect 687178.31448147167 390074.81929540867
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Danish legacy systems - formal definitions
+#------------------------------------------------------------------------------------------------------
+# These formal definitions are for illumination - not for computation.
+# Valid only for observations already measured in the relevant (legacy)
+# reference frame.
+#
+# See below for the much more involved setups needed to go to and from
+# the legacy frames.
+#------------------------------------------------------------------------------------------------------
+# UTM ED50
+<_UTM32_ED50_FORMAL> proj=utm zone=32 ellps=intl units=m no_defs
+<_UTM33_ED50_FORMAL> proj=utm zone=33 ellps=intl units=m no_defs
+
+# System Storebaelt (lon_0= 10 58 nt)
+<_SB_FORMAL> proj=etmerc
+ lat_0=0 lon_0=10.96666666666666667 k=0.999999
+ x_0=500000 y_0=0 ellps=intl
+ units=m no_defs
+
+# Denmark Sweden Bridge Project System Oeresund (ED50) (lon_0 = 12 48 nt)
+<_DKS_FORMAL> proj=etmerc
+ lat_0=0 lon_0=12.8 k=0.999999
+ x_0=119000 y_0=-5895000 ellps=intl
+ units=m no_defs
+
+# Danish Mercator ED50
+<_DM_FORMAL> proj=merc ellps=intl lat_ts=56 lon_0=9
+ x_0=500000 y_0=-3716499.0435879501
+ overfitted_x_0=499919.274212 overfitted_y_0=-3716691.9921
+ units=m no_defs
+
+# Generalstabens lcc Jutland and Zealand (lon_0 = 2 12 nt, W positive)
+<_GS_FORMAL> proj=lcc lat_ts=56 lat_0=55 lon_0=2.2
+ x_0=0 y_0=0 ellps=GS
+
+# Generalstabens konform-koniske for Bornholm (lon_0 = -2 21 nt, W positive)
+<_GSB_FORMAL> proj=lcc lat_1=56 lat_0=55 lon_0=-2.35 # lat_ts=56
+ x_0=18831.460 y_0=5614.621 ellps=GS
+
+# Koebenhavns Kommune
+# <_KK_FORMAL> proj=localcrd ellps=danish units=m no_defs
+#------------------------------------------------------------------------------------------------------
+
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Legacy systems - actual transformations
+#------------------------------------------------------------------------------------------------------
+#
+# Technical implementation
+# -------------------------
+# Most of the transformations to and from the Danish legacy systems are based on a
+# 7-parameter Helmert transformation, followed by a bivariate polynomial adjustment.
+#
+# The Helmert transformation takes us from the current system (ETRS89) to a system that
+# is sufficiently close to the older systems to allow us to take the final steps using
+# the polynomial ("Horner") way.
+#
+# In most cases, the intermediate system is formally ED50: The parameters produce the
+# least squares optimum route from ETRS89 to ED50. But due to the much more stable scale
+# factor of ETRS89, the ED50 coordinates computed using the Helmert step alone reveals
+# the large tensions in the ED50 net: The Helmert transformed coordinates can be thought
+# of as "ED50 if ED50 had as good a scale factor as ETRS89".
+#
+# To discern, we refer to the Helmert transformed datum as "Technical Datum 32",
+# TD32 - a 2D datum for computational use only. A TD32 coordinate transformed
+# to UTM zone 32, is referred to the "Technical Coordinate System 32, on the
+# TD32 datum", _TC32_TD32.
+#
+# _TC32_TD32 is the step stone from which the bivariate Horner polynomials takes us the
+# final steps to the target system.
+#
+# Naming convention
+# ------------------
+# The transformations to and from Danish legacy systems are named such that to go
+#
+# FROM the current system (i.e. for the time being, GEO_ETRS89),
+# TO system X,
+# use the FORWARD method of the transformation accessed as +init=DK:X
+#
+# and conversely, to go
+#
+# FROM system X
+# TO the current system,
+# use the INVERSE method of the transformation accessed as +init=DK:X
+#
+#
+# Numerical example
+# ------------------
+# For example, one may transform data from GEO_ETRS89 to System 45 Bornholm
+# using the syntax
+#
+# echo 15 55 0 0 | cct +init=DK:S45B
+#
+# which will respond with
+#
+# 42915.059286989766000 37569.188021636372000 -33.327159059233963 0.000000000000000
+#
+# And a forward-inverse roundtrip test can be implemented as:
+#
+# echo 15 55 0 0 | cct +init=DK:S45B | cct -I +init=DK:S45B
+#
+# Which results in this near perfect roundtrip:
+#
+# 14.999999999998458 55.000000000290619 -0.000000000931323 0.000000000000000
+#
+# (the test point 15E, 55N is situated close to the south shore of Bornholm,
+# a few km south of the Pedersker village)
+#
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# The primary step stone: _TC32_TD32
+#------------------------------------------------------------------------------------------------------
+<_TC32_TD32>
+ proj=pipeline no_defs
+ step proj=cart ellps=GRS80
+ step proj=helmert inv
+ x = -81.0703 rx = -0.48488
+ y = -89.3603 ry = -0.02436
+ z =-115.7526 rz = -0.41321 s = -0.540645
+ convention = coordinate_frame
+ step proj=cart ellps=intl inv # Now: GEO_TD32
+ step proj=utm ellps=intl zone=32 # And now: TC32_TD32 (UTM32 if ED50 was "perfect")
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:_TC32_TD32
+tolerance 0.1 mm
+accept 9.5 57 0 0
+expect 530454.9998 6317704.6255
+
+operation init=DK:_TC32_TD32
+tolerance 0.1 mm
+accept 15 55 0 0
+expect 883653.4932 6111473.4226
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> UTM32_ED50, valid for Denmark except Bornholm (i.e. west of 13E)
+#------------------------------------------------------------------------------------------------------
+<UTM32_ED50_L>
+ proj=pipeline
+ step init=DK:_TC32_TD32
+ step init=DK_general.pol:TC32_L inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:UTM32_ED50_L
+tolerance 40 mm
+accept 9.5 57 0 0
+expect 530455.2023 6317704.6465
+</gie>
+
+
+
+#------------------------------------------------------------------------------------------------------
+# GEO_ETRS89 -> GEO_ED50, valid for Denmark except Bornholm
+#------------------------------------------------------------------------------------------------------
+<GEO_ED50_L> proj=pipeline
+ step init=DK:UTM32_ED50_L
+ step proj=utm zone=32 ellps=intl units=m no_defs inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:GEO_ED50_L
+tolerance 40 mm
+accept 9.5 57 0 0
+expect 9.501323491951883 57.000587965055587
+accept 12 55 0 0
+expect 12.001173940 55.000628676 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> UTM32_ED50, Bornholm
+#------------------------------------------------------------------------------------------------------
+<UTM32_ED50_B> proj=pipeline ellps=GRS80
+ step init=DK:_TC32_TD32
+ step init=DK_bornholm.pol:UTM32_ED50_B # no inv here, due to polynomial swap in DK_bornholm.pol
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:UTM32_ED50_B
+tolerance 30 mm
+accept 15 55 0 0
+expect 883654.5767 6111474.6515 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> UTM33_ED50, Bornholm
+#------------------------------------------------------------------------------------------------------
+<UTM33_ED50_B> proj=pipeline ellps=GRS80
+ step init=DK:UTM32_ED50_B
+ step proj=utm zone=32 ellps=intl units=m no_defs inv
+ step proj=utm zone=33 ellps=intl units=m no_defs
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:UTM33_ED50_B
+tolerance 30 mm
+accept 15 55 0 0
+expect 500071.1125 6094991.2120 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> GEO_ED50, Bornholm
+<GEO_ED50_B> proj=pipeline ellps=GRS80
+ step init=DK:UTM32_ED50_B
+ step proj=utm zone=32 ellps=intl units=m no_defs inv
+<ED50_B> init=DK:GEO_ED50_B
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:GEO_ED50_B
+tolerance 30 mm
+accept 15 55 0 0
+expect 15.001111641 55.000603892 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System45
+#------------------------------------------------------------------------------------------------------
+<S45B> proj=pipeline no_defs
+ step init=DK:_TC32_TD32
+ step init=DK_bornholm.pol:TC32_B inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:S45B
+tolerance 40 mm
+accept 15 55 0 0
+expect 42915.0596 37569.1876 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System 34 Jutland
+#------------------------------------------------------------------------------------------------------
+<S34J> proj=pipeline ellps=GRS80
+ step init=DK:_TC32_TD32
+ step init=DK_jutland.pol:TC32_L inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:S34J
+tolerance 40 mm
+accept 9.5 57 0 0
+expect 263190.2497 286078.3847
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System 34 Zealand
+#------------------------------------------------------------------------------------------------------
+<S34S> proj=pipeline ellps=GRS80
+ step init=DK:_TC32_TD32
+ step init=DK_zealand.pol:TC32_L inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:S34S
+tolerance 40 mm
+accept 12.5 55.7 0 0
+expect 76425.6474 143042.0038
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# System Storebaelt (Great Belt system)
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System Storebaelt (The Great Belt System)
+#------------------------------------------------------------------------------------------------------
+<SB> proj=pipeline no_defs
+ step init=DK:UTM32_ED50_L
+ step init=DK_bridges.pol:UTM32_ED50_L inv # tol = 0.5 mm
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:SB
+tolerance 30 mm
+accept 11 55.3 0 0
+expect 502194.1051 6130826.4745
+accept 10.891109758 55.319726643 0 0
+expect 495280.2216 6133024.6786
+
+direction inverse
+accept 502194.1051 6130826.4745 0 0
+expect 11 55.3
+accept 495280.2216 6133024.6786 0 0
+expect 10.891109758 55.319726643
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Denmark Sweden Bridge Project System Oeresund (ED50) (lon_0 = 12 48 nt)
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> Denmark Sweden Bridge Project System (ED50)
+#------------------------------------------------------------------------------------------------------
+<DKS> proj=pipeline no_defs
+ step init=DK:S34S
+ step init=DK_bridges.pol:S34S inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:DKS
+tolerance 30 mm
+accept 12.7 55.66 0 0
+expect 112779.7960 275908.0748 # Authoritative value, obtained from KMSTrans2
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> Generalstabens System, except Bornholm
+#------------------------------------------------------------------------------------------------------
+<GS> proj=pipeline ellps=GRS80
+ step init=DK:UTM32_ED50_L
+ step init=DK_general.pol:GS
+#------------------------------------------------------------------------------------------------------
+<GEO_GS> proj=pipeline ellps=GRS80
+ step init=DK:GS
+ step init=DK:GS_FORMAL inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:GS
+tolerance 30 mm
+accept 8.998706228455516 55.999371897298793 0 0
+expect 85938.0998 112123.5083
+accept 10 57 0 0
+expect 22859.7375 222752.8941
+direction inverse
+accept 22859.7375 222752.8941 0 0
+expect 10 57
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> Generalstabens System Bornholm
+#------------------------------------------------------------------------------------------------------
+# Implemented as a 4th order complex polynomium going from UTM33_ED50
+# to System GS Bornholm. The datum shift from ETRS89 to ED50 is done
+# in the UTM33_ED50_B step.
+#
+# The complex polynomium partially implements a further datum shift,
+# to System GS Bornholm, partially carries out the conformal mapping
+# from UTM to the Lambert Conformal Conic, which is the formal basis
+# of the GS systems.
+#------------------------------------------------------------------------------------------------------
+<GSB> proj=pipeline ellps=GRS80
+ step init=DK:UTM33_ED50_B
+ step init=DK_bornholm.pol:GSB
+#------------------------------------------------------------------------------------------------------
+<GEO_GSB> proj=pipeline ellps=GRS80 #
+ step init=DK:GSB
+ step init=DK:_GSB_FORMAL inv
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:GSB
+tolerance 30 mm
+accept 15 55 0 0
+expect 14063.5412 5598.3811
+direction inverse
+accept 14063.5412 5598.3811 0 0
+expect 15 55
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Koebenhavns Kommune Koordinatsystem
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System Koebenhavns Kommune
+#------------------------------------------------------------------------------------------------------
+<KK> proj=pipeline no_defs
+ step init=DK:S34S
+ step init=DK_zealand.pol:KK
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:KK
+tolerance 30 mm
+accept 12.5 55.7 0 0
+expect -133514.7527 79977.9650 # Authoritative value, obtained from KMSTrans2
+direction inverse
+accept -133514.7527 79977.9650 0 0
+expect 12.5 55.7
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+
+
+
+
+#------------------------------------------------------------------------------------------------------
+# System Ostenfeld (South Jutland, Part of Germany before 1920)
+#
+# NOT READY YET
+#------------------------------------------------------------------------------------------------------
+# <OS_FORMAL> proj=localcrd ellps=bessel units=m no_defs
+#------------------------------------------------------------------------------------------------------
+# ETRS89 (Geodetic) -> System Ostenfeld
+#------------------------------------------------------------------------------------------------------
+<OS> proj=pipeline ellps=GRS80
+ step init=DK:S34J
+ step init=DK_jutland.pol:OS
+ step proj=axisswap order=2,1
+#------------------------------------------------------------------------------------------------------
+<gie>
+operation init=DK:OS
+tolerance 30 mm
+accept 9 55 0 0
+expect 59184.3614 -14910.8690 # KMSTrans2
+direction inverse
+accept 59184.3614 -14910.8690 0 0
+expect 9 55
+</gie>
+#------------------------------------------------------------------------------------------------------
+
+
+
+#------------------------------------------------------------------------------------------------------
+# Missing: Danske Mercator ED50 & Vertical reference frame transformations
+#------------------------------------------------------------------------------------------------------
+