In 1976 Berry introduced a simple mathematical equation to calculate artificial night sky
brightness at zenith. In the original model cities, considered as points with given population,
are only sources of light emission. In contrary to Berry׳ s model, we assumed that all terrain
surface can be a source of light. Emission of light depends on percent of built up area in a
given cell. We based on Berry׳ s model. Using field measurements and high-resolution data
we obtained the map of night sky brightness over Poland in 100-m resolution. High …