# The DM stack is no longer using the geom package

**URL:** <https://www.rubin.community/t/the-dm-stack-is-no-longer-using-the-geom-package/2904>\
**Category:** DM Notifications\
**Tags:** dm-dev\
**Created:** [May 11, 2018, 4:16pm UTC](https://www.rubin.community/t/the-dm-stack-is-no-longer-using-the-geom-package/2904 "2018-05-11T16:16:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rowen](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/rowen/32/52_2.png) [@rowen](https://www.rubin.community/u/rowen)\
**Post date:** [May 11, 2018, 4:16pm UTC](https://www.rubin.community/t/the-dm-stack-is-no-longer-using-the-geom-package/2904/1 "2018-05-11T16:16:03Z")

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As of [DM-13790](https://jira.lsstcorp.org/browse/DM-13790?devStatusDetailDialog=branch) the LSST DM stack has switched from using the `geom` package, to `sphgeom`, Serge Monkewitz’s modern replacement written in C++.

The next step in [RFC-460](https://jira.lsstcorp.org/browse/RFC-460) is to replace the guts of `geom` with most of `lsst.afw.geom`, while leaving aliases in `lsst.afw.geom` for backwards compatibility.