Zoom info: https://stanford.zoom.us/j/98573606203?pwd=NW1YU3lhUDJyY25VdVpqdjBqYVJY…

The coming decade will see a plethora of large area astronomical surveys, from both the ground and space and across the electromagnetic spectrum. Combining these data is a wonderful example of the whole being greater than the sum of its parts. We will discuss two examples: gains from combining the Euclid space mission with the Vera C. Rubin Legacy Survey of Space and Time (LSST), and cross-correlations of galaxy surveys with cosmic microwave background and X-ray imaging to take a comprehensive census of the components of the cosmic web - galaxies, diffuse gas, and dark matter - and their co-evolution, thereby directly tackling the Cosmic Ecosystem priority area called out in the Astro2020 decadal report.