Comparison of JavaScript libraries for web-cartography

Due to the active development of web-cartography, the article deals with the currently relevant cartographic JavaScript libraries, namely: Yandex.Maps, Google Maps, OpenLayers and Leaflet.JS, which are the basis of most modern geographic information portals. For each library an overview of the main functions and benefits is provided. The author defines a number of general requirements for cartographic libraries for visualization of spatial data. Particular attention is paid to the built-in tools and support for spatial data formats “out of the box” and their participation in existing projects. Using the specified requirements, then an analysis is carried out on a number of criteria, which ultimately makes it possible to make an assumption for the solution of which problems and under what conditions it is worth to use one or another library.