An indicator of the uniformity of the distribution of the areas of green areas of common use

The developing sustainability of cities is closely linked to ensuring the balance of green areas of common use. It has been scientifically proven that the effects of green zones are significant for both the environment and the population. An urgent task of the territorial and spatial organization of the city and its administrative-territorial units is a strategic assessment of the uniformity of the distribution of green areas of common use.The working hypothesis is the assumption that using the Kulback–Leibler distance, it is possible to accurately describe the degree of unevenness of the distribution of the areas of green areas of public use relative to the areas of the administrative-territorial units of the city and the resident population. The areas of green spaces of common use and administrative-territorial units of the cities of Berlin, Moscow and St. Petersburg are studied. It was established that the distribution of the areas of the open public green spaces in Berlin is close to uniform, the distribution of the areas of the city’s territorial units is uneven, in Moscow it is the opposite, and in St. Petersburg the distribution of both the areas of open public green spaces and the districs are uneven. The indicator of uniformity of distribution of the areas of open public green spaces relative to the land management of the city, developed by the authors, calculated on the basis of a dimensionless value – the Kullback–Leibler distance, makes it possible to evaluate and compare the degree of unevenness of the distribution of the areas of open public green spaces relative to the areas of territorial units, in the territories of which they are located, both for the city and between cities. The indicator may be in demand at the stage of making management decisions to ensure total area of open public green spaces during urban planning of the city territory and its administrative-territorial units.