#3485: Introduce a new 64-bit integer raster data type --------------------------+--------------------------- Reporter: mlennert | Owner: grass-dev@… Type: enhancement | Status: new Priority: normal | Milestone: 8.0.0 Component: LibRaster | Version: svn-trunk Resolution: | Keywords: raster 64-bit CPU: Unspecified | Platform: Unspecified --------------------------+---------------------------
Comment (by mlennert): Replying to [comment:1 mmetz]: > Replying to [ticket:3485 mlennert]: > > From #3084: > > > > "Most importantly, a GRASS raster format for 64-bit signed integer. Note that GDAL does not support 64-bit signed or unsigned integers. The reason is probably that a portable implementation of 64-bit integers is not so easy. Regarding GRASS raster processing, the need for 64-bit integers usually arises only for raster maps with more than 2,147,483,647 cells which in turn usually requires Large File Support (LFS). Therefore the check for the availability of a 64-bit integer could be coupled to LFS. If support for 64-bit signed integer raster maps (say, LCELL) could be added to GRASS, users would need to stick to GRASS since GDAL raster export of 64-bit integers is not available. Interesting idea." > > A 64 bit signed integer type has been added to trunk with r72230. Various other projects, e.g. GDAL, SQLite, HDF5, Python also have some 64 bit signed integer type. In order to avoid namespace collision, the new type has been defined as grass_int64 and LCELL. GRASS libraries and modules do not yet make use of this type. Defining a 64 bit signed integer type has been tested on Linux + gcc, FreeBSD + clang, and MS Windows + gcc (mingw). Great, thanks a lot, Markus ! What is the roadmap from here, not in terms of calendar, but in terms of tasks that need to be done to actually be able to use this new integer type ? -- Ticket URL: <https://trac.osgeo.org/grass/ticket/3485#comment:2> GRASS GIS <https://grass.osgeo.org>
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