[GRASS-dev] [GRASS GIS] #3485: Introduce a new 64-bit integer raster data type

GRASS GIS trac at osgeo.org
Mon Jan 29 01:08:10 PST 2018

#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
 Keywords:  raster 64-bit  |        CPU:  Unspecified
 Platform:  Unspecified    |
 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."


 "As of r68944, i.segment supports regions with more than 2,147,483,647
 cells, but the number of final objects must not exceed 2,147,483,647. This
 can only be solved by introducing a new 64 bit integer data type in
 addition to CELL, FCELL, DCELL, something for GRASS 8 maybe."

Ticket URL: <https://trac.osgeo.org/grass/ticket/3485>
GRASS GIS <https://grass.osgeo.org>

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