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Context. Friends-of-friends algorithms are a common tool to detect galaxygroups and clusters in large survey data. In order to be as precise aspossible, they have to be carefully calibrated using mock catalogues.  Aims. We create an accurate and robust description of the matter distributionin the local Universe using the most up-to-date available data. This willprovide the input for a specific cosmological test planned as follow-up to thiswork, and will be useful for general extragalactic and cosmological research.  Methods. We created a set of galaxy group catalogues based on the 2MRS andSDSS DR12 galaxy samples using a friends-of-friends based group finderalgorithm. The algorithm was carefully calibrated and optimised on a new set ofwide-angle mock catalogues from the Millennium simulation, in order to provideaccurate total mass estimates of the galaxy groups taking into account therelevant observational biases in 2MRS and SDSS.  Results. We provide four different catalogues (i) a 2MRS based groupcatalogue; (ii) an SDSS DR12 based group catalogue reaching out to a redshift z= 0.11 with stellar mass estimates for 70% of the galaxies; (iii) a catalogueproviding additional fundamental plane distances for all groups of the SDSScatalogue that host elliptical galaxies; (iv) a catalogue of the massdistribution in the local Universe based on a combination of our 2MRS and SDSScatalogues.  Conclusions. While motivated by a specific cosmological test, three of thefour catalogues that we produced are well suited to act as reference databasesfor a variety of extragalactic and cosmological science cases. Our catalogue offundamental plane distances for SDSS groups provides further added value tothis paper.

The matter distribution in the local Universe as derived from galaxy groups in SDSS DR12 and 2MRS