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arbitrary number of steps (fixes #1632)
EPSG:9103 (NAD27 to ITRF2014 (1)) is now handled.
Note:EPSG:9104 (NAD27 to ITRF2014 (2)) is not currently, since it uses
for step EPSG:8861 (NAD83(HARN) to NAD83(FBN) (1))
an unsupported transformation method (NADCON5 (3D), EPSG:1075).
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'RGSPM06 to Danger 1950 height' grids
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Note: a hack has been added into customizations.sql to cancel deprecatation
of USA geoid2012 grids by geoid2018 grids, as the later are not yet available
in proj-datumgrid-northamerica (https://github.com/OSGeo/proj-datumgrid/issues/55)
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With limitation of https://github.com/OSGeo/PROJ/issues/1632 regarding
concatenated operations with more than 3 steps.
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Currently very few transformations from/to WGS84 (Gxxxx) are registered
in the EPSG database, and there isn't even transformations between WGS84 EPSG:4326
and those ones. Consequently transformations to those realizations often
ended up as no-operation, whereas going through WGS84 EPSG:4326 will bring
more meaningful results. So register those EPSG:4326<-->WGS 84 (Gxxx)
null transformations, and when having WGS 84 (Gxxx) as source/target,
consider EPSG:4326 as an intermediate.
This change has no effect on the existing direct transformations
from/to WGS 84 (Gxxx).
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grid_alternatives.sql: Add DLX_ETRS89_geo.gsb and D73_ETRS89_geo.gsb grids in grid_alternatives (added in proj-datumgrid-europe package per https://github.com/OSGeo/proj-datumgrid/pull/54)
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- Import scope and remarks for coordinate operations of the EPSG dataset.
Database size goes from 5.2 MB to 5.55 MB
- Add proj_get_scope() and proj_get_remarks()
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https://github.com/OSGeo/proj-datumgrid/pull/53)
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to instanciate a projected 3D CRS
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RAF18
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proj-datumgrid-europe package per https://github.com/OSGeo/proj-datumgrid/pull/50)
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grids
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ETRS89 (EPSG:4937), make sure that the vgridshift is applied first (ie on Amersfoort datum) before the hgridshift
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SWEREF99' transformation
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That is Transverse_Mercator/Gauss_Kruger, Lambert_Conformal_Conic and
Hotine_Oblique_Mercator_Azimuth_Natural_Origin
Decreases proj.db from 5 853 184 bytes to 5 189 632 bytes.
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- Transform conversion as a view, and when inserting into it, actually
insert into 3 tables: conversion_table, conversion_method and conversion_param,
so that method and parameter names are not repeated each time.
- Similarly for helmert_tranformation, insert into helmert_transformation_tabl
and coordinate_operation_method.
This reduces the db size from 6 344 704 bytes to 5 853 184 bytes, without
significant slowdown for queries.
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database
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Minor update w.r.t 9.5.5 that adds a few new coordinate operations.
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substitution for VERTCON method
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to restrict and prioritize searches
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transformations
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the data/epsg and data/IGNF files
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authority
Up to now, we re-processed the data/IGNF PROJ.4 definition to ingest it into proj.db,
but this file originally come from a processing of IGNF.xml
( http://librairies.ign.fr/geoportail/resources/IGNF.xml )
The end result is not strictly equivalent, as data/IGNF has some 'magic' to create
towgs84 / nadgrids, since IGNF.xml doesn't necessary contain all transformations
from its geodetic systems to WGS84. I've tried to re-add some of those missing transforms
(null Helmert transforms), so it can be used for pivoting, but that might be incomplete.
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https://github.com/OSGeo/proj-datumgrid/pull/40
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https://github.com/OSGeo/proj-datumgrid/pull/39
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This work mostly consists of:
- a C++ implementation of the ISO-19111:2018 / OGC Topic 2
"Referencing by coordinates" classes to represent Datums,
Coordinate systems, CRSs (Coordinate Reference Systems) and
Coordinate Operations.
- methods to convert between this C++ modeling and WKT1, WKT2
and PROJ string representations of those objects
- management and query of a SQLite3 database of CRS and Coordinate Operation definition
- a C API binding part of those capabilities
This is all-in-one squashed commit of the work of
https://github.com/OSGeo/proj.4/pull/1040
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