2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/1644We discuss the implementation and validation of a procedure aimed to detect groups and clusters of galaxies in DPOSS catalogs.6 pages, 3 figures, To appear in the proceedings of ASP conference series "Virtual Observatories of the Future" eds. R.J. Brunner, S.G. Djorgovski, & A. SzalayAstrophysicstext