How to control the number of matches when do astrometry?

[ameisner (Aaron Meisner)]

Some further discussion of maxRefObjects and other astrometry-related parameters that might be worth exploring is at:

Bus error when running pipelines

FYI, I’ve found a solution for the large memory usage in the calibrate task when processing very dense fields. The high memory usage comes from using very many (50k+) reference catalog sources in the reference matching portion of WCS fitting in AstrometryTask. There is a configurable present in the pipelines that solves this by limiting the number of reference sources used in the reference match: tasks: calibrate: class: lsst.pipe.tasks.calibrate.CalibrateTask config: astromet…