English to Polish Bus/Financial Geography

He used satellite images of the world at night to identify contiguous lighted regions. (Nighttime illumination
indicates energy consumption, which corresponds to economic activity.) He then calibrated the light data against existing estimates of national and regional economic output and was able to derive dollar estimates of annual economic
productivity (the total value of goods and services produced) for every megaregion. A megaregion must meet two criteria: First, it must be a contiguous lighted area that includes at least one major city center and its metropolitan region.