Changes between Version 25 and Version 26 of Grass7/NewFeatures76


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Timestamp:
Dec 27, 2018, 4:29:56 AM (6 years ago)
Author:
neteler
Comment:

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  • Grass7/NewFeatures76

    v25 v26  
    8585
    8686In the past year of development, there were several changes in different GRASS GIS libraries. The most relevant changes are described below:
    87  * a **new raster compression** method has been added: ZSTD ([http://www.zstd.net/ ZSTD], [https://github.com/facebook/zstd ZSTD on github]). ZSTD is an improvement over ZLIB's deflate method, providing both faster and higher compression than ZLIB.
     87 * a **new raster compression** method has been added: [https://grass.osgeo.org/grass76/manuals/r.compress.html#applying-zstd-compression ZSTD] ([http://www.zstd.net/ ZSTD], see [https://github.com/facebook/zstd ZSTD on github]). ZSTD is an improvement over ZLIB's deflate method, providing both faster and higher compression than ZLIB.
    8888 * a **new raster map type** has been added: **GRASS virtual raster** (VRT) which is a virtual mosaic of the list of input raster maps.
    8989 * **support for PROJ 5**: previously, reprojection from one CRS to another CRS used WGS84 as pivot datum: CRS1 -> WGS84 -> CRS2. This method provided reasonable results and allowed for reprojection on-the-fly. However, using a fixed pivot datum has been regarded as a suboptimal solution for coordinate reprojection, therefore a new mechanism has been introduced in PROJ 5, where custom pipelines for coordinate conversion and transformation can be defined. Together with the new PROJ 5+ API, this pipeline mechanism is now supported starting with proj-5.1.0. Custom coordinate conversion/transformation pipelines can now be defined for raster and vector reprojection.