Kelsey Jordahl, Mosaics Team Lead at Planet Labs, will be presenting “Mosaicking the Earth Every Day” at tomorrow's Data Science Seminar. The Data Science Seminar is free and open to the public.
Planet Labs currently operates about 60 Earth observation satellites imaging 50 million square kilometers of land area per day. We plan on tripling those figures in coming months, fulfilling our Mission 1 to image the surface of the Earth every day. Global mosaics are created from these images at regular intervals (quarterly, monthly, and weekly) by selecting the best quality scenes (e.g. cloud- and haze-free), color balancing, and seamlessly compositing millions of scenes to create continuous maps of the Earth for each time slice. As our data rate increases, we plan on scaling up the cadence of our mosaics, including a building a continuously updated "dynamic" mosaic of the most recent cloud-free images of the Earth. Daily data at 5 meter spatial resolution will open up new analysis techniques previously limited by the temporal or spatial resolution of existing instruments.