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maRci002 / proj4dart

Proj4dart is a Dart library to transform point coordinates from one coordinate system to another, including datum transformations.
MIT License
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PROJ release version #13

Closed behzad-tmr closed 1 year ago

behzad-tmr commented 1 year ago

According to https://proj.org/ , Could you plz declare which PROJ release version is used in this package. I need PROJ 7.0.0 .

maRci002 commented 1 year ago

Proj4dart was ported from Proj4js.

Proj4js is a JavaScript library to transform point coordinates from one coordinate system to another, including datum transformations. Originally a port of PROJ (then known as PROJ.4) and GCTCP C (Archive) it is a part of the MetaCRS group of projects.

Thereby: The specific version of Proj.4 that is used by Proj4js is not specified, as the library is designed to work with multiple versions of Proj.4.

Proj 6 / 7 brings grid shift transforms support which is availiable in Proj4js proj4js/proj4js#363 and also availiable in Proj4dart #12.

Note: #12 added nadgrids support (.gsb files) but not Geodetic TIFF grids see https://github.com/maRci002/proj4dart/issues/9#issuecomment-1221261169