Декомпозиция ретроспективных топографических карт для послойной оценки типов регионального природопользования

Abstract

On the example of the most developed part of the lake Baikal basin, the decomposition of the digital coverage content from 12 sheets of the topographic map scale 1:84 000, compiled by the Corps of Military Topographers in 1896-1912, was performed. As a result of vectorization of retrospective layers of topographic objects and subsequent transformation of their shp files into classes of spatial objects of the ArcGIS environment, two cartographic sets of spatial object classes were formed that characterize two types of regional environmental management - traditional pastoral and invasive agricultural. As a result of layer-by-layer geoinformation modeling of cartographic sets on a modern topographic basis and a digital relief model, primary areas of settlement and economic use of the territory were established, physical and geographical characteristics of the past economic use of the territory were determined, and separate mapping of spatial and temporal life support structures of different types of nature management was performed. For operational digital visualization, a technological solution is proposed for storing and mapping sets of spatial object classes by organizing a file-based geodata of the ArcGIS information environment. Cartographic reconstructions of pastoral and agricultural nature management at the beginning of the 20th century are presented, as well as a general cartographic reconstruction of nature management on a landscape basis, which allows us to assert that traditional pastoral nature management does not involve the transformation of the Earth's surface and is characterized by continuous restorative dynamics of natural landscapes, and invasive nature management is based on the violation of soil cover, which later led to the emergence of areas of water and wind erosion.