Abstract. On the basis of the set theory, a formal model of the synthesized screen image of dynamic situation in the areas of mobile objects monitoring is proposed. It varies the description of the set of aggregated static and dynamic objects that make the informative filling of adaptive dynamic scene, taking into account the context of the subject domain. The designed algorithm of layered visualization of the context cartographic background is developed with the use of the types of cartographic objects selected in the model. The model was implemented into the web-oriented GIS for monitoring of moving objects, which operates under the concept of MVC and has a client-server architecture. For its implementation, a set of modern web technologies were used: on the server side PHP and MySQL, on the client side AJAX and jQuery. The module of addition/deletion of information about moving objects in dynamic scenes interacts with the map service Google Maps, without creating a significant load on the backend system

Keywords: web-based system of monitoring of mobile objects, dynamic scene, cartographic background, symbol of moving object, layered imaging, context, MVC, client-server architecture.