Аннотация:In this paper we consider methods of using haversine mathematical formulas to determine the great circle geographical distances by coordinates (latitude and longitude) obtained from API of geoinformation online services. These methods are used to calculate azimuth directions of geographical objects ( facilities, buildings, streets, satellite antennas, etc.). A special software product called «SUITE FOR THE CALCULATION AND VISUALIZATION OF DISTANCES AND AZIMUTH DIRECTIONS» that is available online was implemented on the client and server sides with the help of software. The results obtained and the suite for the calculation can be used for the needs of «Smart Home» and «Smart City» projects, as well as to find the position of stars and planets in the night sky when they are observed. This paper and the suite are available as electronic resources on the Internet and Wikipedia by the following link: http://109.73.3.247:8080/wikiweb/index.php/AZcalcmapThe software code was implemented on the server side for the purposes of international cooperation and use of this work online. It provides a possibility to choose the desired language in the drop-down menu of the graphic interface in the left vertical tool bar of the client’s browser and use the development data substantially reducinglinguistic and national barriers.