r.watershed large grids

[dnewcomb]

tried r.watershed on a large elevation grid (51000 rows, 133000 columns, 6783000000 cells) with the following options:

r.watershed -m elevation=nc_20ft_ncfpm@statewide threshold=500000 accumulation=nc_flow_accum_wsh@statewide drainage=nc_direct_wsh@statewide basin=nc_wshed_label_wsh stream=nc_stream_seg_wsh half_basin=nc_half_basin_wsh memory=8000

and got the following output:

SECTION 1 beginning: Initiating Variables. 5 sections total. SECTION 1a: Mark masked and NULL cells segment_format(fd,1,-803458658,1,4096,8): illegal value(s) seg_open(): illegal configuration parameter(s) segment_format(fd,1,-803458657,1,262144,16): illegal value(s) seg_open(): illegal configuration parameter(s) SECTION 1b: Determining Offmap Flow. Subprocess failed with exit code 11 category information for [nc_flow_accum_wsh@statewide] in [statewide] missing or invalid category information for [nc_direct_wsh@statewide] in [statewide] missing or invalid category information for [nc_wshed_label_wsh] in [statewide] missing or invalid category information for [nc_stream_seg_wsh] in [statewide] missing or invalid category information for [nc_half_basin_wsh] in [statewide] missing or invalid (Sat Aug 27 11:38:42 2011) Command finished (45054 sec)

GRASS 7.0 svn pull from 8/17/2011

looking at raster/r.watershed/seg/cseg.h