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This document shows that the default table ordering is unefficient
(but there are good reasons for this ordering, see
Section
). For an efficient gridding process you
should:
- give XY_MAP the right to allocate as much as memory as
possible, e.g. 90% of the RAM (assuming you run a single CLASS
session at a time), leaving typically 10% for the regular OS
operations,
- if the problem still does not fit in memory, it is worth
transposing the .tab table to .bat order before invoking XY_MAP.
This can be achieved with the commands
LAS> TRANSPOSE myfile.tab myfile.bat 21
LAS> SIC LOGICAL VOLATILE_MEMORY 90%
LAS> XY_MAP myfile ! Will take myfile.bat if available
Note that the memory allocated during XY_MAP processing is
freed as soon as the command terminates.
Gildas manager
2023-06-01