▦ What is measured
Earth observation by everyday topic
A plain-English map of 3,681 datasets from NASA, ESA Copernicus, NOAA, USGS & USDA, grouped by the topics people actually ask about — wildfires, air pollution, drought, floods, sea level and more. Each block is sized by how many datasets exist. Click a topic to zoom in, then a sub-topic to see the actual dataset names — or jump to the catalog. Built for reporters, students, and anyone who isn't an Earth scientist.
Block size = number of datasets that measure it (most-used NASA collections + ESA Copernicus, NOAA, USGS & USDA + free partner layers). Topics are auto-classified from dataset names, so a few may land in a neighbouring bucket. Not an official NASA taxonomy.