[PROJ] Announcing PROJ 6.0.0

[Jeff McKenna]

Thanks to Bas for pointing this out: the spatialite ticket link is 
https://www.gaia-gis.it/fossil/libspatialite/info/6eabdf0e6d3520a7

-jeff



On 2019-03-18 4:27 PM, Jeff McKenna wrote:
> Hi Kristian,
> 
> Just an update that I've brought this release to Sandro's attention on 
> the spatialite-users list 
> (https://groups.google.com/forum/#!topic/spatialite-users/eNkl3Ec8kfQ).
> 
> Thanks again for your hard work,
> 
> -jeff
> 
> 
> 
> On 2019-03-01 2:19 PM, Kristian Evers wrote:
>> PROJ 6 has undergone extensive changes to increase its functional 
>> scope from a
>> cartographic projection engine with so-called "early-binding" geodetic 
>> datum
>> transformation capabilities to a more complete library supporting 
>> coordinate
>> transformations and coordinate reference systems.
>>
>> As a foundation for other enhancements, PROJ now includes a C++ 
>> implementation
>> of the modelisation propopsed by the ISO-19111:2019 standard / OGC 
>> Abstract
>> Specification Topic 2: "Referencing By Coordinates", for geodetic 
>> reference
>> frames (datums), coordinate reference systems and coordinate operations.
>> Construction and query of those geodetic objects is available through 
>> a new C++
>> API, and also accessible for the most part from bindings in the C API.
>>
>> Those geodetic objects can be imported and exported from and into the OGC
>> Well-Known Text format (WKT) in its different variants: ESRI WKT, GDAL 
>> WKT 1,
>> WKT2:2015 (ISO 19162:2015) and WKT2:2018 (ISO 19162:2018). Import and 
>> export of
>> CRS objects from and into PROJ strings is also supported. This 
>> functionality
>> was previously available in the GDAL software library (except WKT2 
>> support
>> which is a new feature), and is now an integral part of PROJ.
>>
>> A unified database of geodetic objects, coordinate reference systems 
>> and their
>> metadata, and coordinate operations between those CRS is now available 
>> in a
>> SQLite3 database file, proj.db. This includes definitions imported 
>> from the
>> IOGP EPSG dataset (v9.6.0 release), the IGNF (French national mapping 
>> agency)
>> geodetic registry and the ESRI projection engine database. PROJ is now 
>> the
>> reference software in the "OSGeo C stack" for this CRS and coordinate 
>> operation
>> database, whereas previously this functionality was spread over PROJ, 
>> GDAL and
>> libgeotiff, and used CSV or other adhoc text-based formats.
>>
>> Late-binding coordinate operation capabilities, that takes  metadata 
>> such as
>> area of use and accuracy into account, has been added. This can avoid 
>> in a
>> number of situations the past requirement of using WGS84 as a pivot 
>> system,
>> which could cause unneeded accuracy loss, or was not doable at all 
>> sometimes
>> when transformation to WGS84 was not available. Those late-binding 
>> capabilities
>> are now used by the proj_create_crs_to_crs() function and the cs2cs 
>> utility.
>>
>> A new command line utility, projinfo, has been added to query 
>> information about
>> a geodetic object of the database, import and export geodetic objects 
>> from/into
>> WKT and PROJ strings, and display coordinate operations available 
>> between two
>> CRSs.
>>
>> Download the source distribution here:
>>
>>    https://download.osgeo.org/proj/proj-6.0.0.tar.gz
>>    https://download.osgeo.org/proj/proj-6.0.0.zip
>>
>>
>> In addition to the new version of PROJ we are also releasing new datum 
>> grid
>> packages:
>>
>> proj-datumgrid-europe 1.2:
>>
>>    https://download.osgeo.org/proj/proj-datumgrid-europe-1.2.tar.gz
>>    https://download.osgeo.org/proj/proj-datumgrid-europe-1.2.zip
>>
>>    Changes include: Grids covering the UK, France and Sweden.
>>
>> proj-datumgrid-north-america 1.2:
>>
>>    
>> https://download.osgeo.org/proj/proj-datumgrid-north-america-1.2.tar.gz
>>    https://download.osgeo.org/proj/proj-datumgrid-north-america-1.2.zip
>>
>>    Changes include: NAD83 -> NAD83(HPGN) grids, GEOIDB12 grids and the
>>    Canadian ntv2_0.gsb grid
>>
>> proj-datumgrid-world 1.0
>>
>>    https://download.osgeo.org/proj/proj-datumgrid-world-1.0.tar.gz
>>    https://download.osgeo.org/proj/proj-datumgrid-world-1.0.zip
>>
>>    This is the first version of the world wide package. Currently it 
>> only holds
>>    the EGM2008 geoid grid.
>>
>>


-- 
Jeff McKenna
MapServer Consulting and Training Services
https://gatewaygeomatics.com/