Топография is a free Android application developed by Anton Yuriev, designed to provide users with a comprehensive set of tools and references for working with topographic maps. The app includes a range of features such as a legend of topographic maps of Russia and the USSR, a list of abbreviations and symbols used on topographic maps, and a coordinate converter that allows users to transform geographic coordinates from various formats to the most commonly used formats in navigation tools, apps, and online services.

In addition, the app includes a tool for determining the sheet number of a topographic map in the system of grid and nomenclature of topographic maps based on the coordinates of any point of interest. It also offers a calculator for calculating magnetic azimuth, true azimuth, and directional angle, as well as a distance converter that allows users to convert distances measured on a map in centimeters to real-world distances in kilometers and vice versa.

Overall, Топография is a comprehensive tool for anyone working with topographic maps in Russia and the USSR, and it provides an easy and convenient way to access the information and tools needed to work with these maps effectively.