# About Selection of interpolation function

**URL:** <https://precice.discourse.group/t/about-selection-of-interpolation-function/1740>\
**Category:** Using preCICE\
**Tags:** data-mapping\
**Created:** [January 12, 2024, 8:14am UTC](https://precice.discourse.group/t/about-selection-of-interpolation-function/1740 "2024-01-12T08:14:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ilovenili](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/ilovenili/32/1663_2.png) [@ilovenili](https://precice.discourse.group/u/ilovenili)\
**Post date:** [January 12, 2024, 8:14am UTC](https://precice.discourse.group/t/about-selection-of-interpolation-function/1740/1 "2024-01-12T08:14:41Z")

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HI:  
If there is a large gap normal to the coupling surface, what interpolation algorithm should be chosen as appropriate and why?

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**Author:** ![Makis](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/makis/32/25_2.png) [@Makis](https://precice.discourse.group/u/Makis)\
**Post date:** [January 21, 2024, 10:49pm UTC](https://precice.discourse.group/t/about-selection-of-interpolation-function/1740/2 "2024-01-21T22:49:58Z")

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Small gaps and overlaps are generally fine with any mapping algorithm: [Mapping configuration | preCICE - The Coupling Library](https://precice.org/configuration-mapping.html)

If the two geometries are very different (e.g., different shapes), then I would actually suggest that you look into making them better fit, first.