# ISLOCALTOGLOBALMAPPINGBASIC
basic implementation of the `ISLocalToGlobalMapping` object. When `ISGlobalToLocalMappingApply()` is used this is good for only small and moderate size problems. 
## Options Database Keys

- ***-islocaltoglobalmapping_type basic -*** select this method





## Developer Note
This stores all the mapping information on each MPI rank.


## See Also
 [](sec_scatter), `ISLocalToGlobalMappingCreate()`, `ISLocalToGlobalMappingSetType()`, `ISLOCALTOGLOBALMAPPINGHASH`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/utils/isltog.c.html#ISLOCALTOGLOBALMAPPINGBASIC">src/vec/is/utils/isltog.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/utils/isltog.c)


[Index of all IS routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
