This chapter contains information about implementation of DecernsSDSS features,
description of the user interface (gui), and explanation of such concepts as
project, map set, group. This chapter contains also useful advices on implementation of
the SDSS advanced functions.
User guide consists of the following chapters:
2.1 Authorization
2.2 Main menu
2.3 Projects management
2.4 Problem structuring and analyzing
2.5 Map data manipulation
2.6 Groups management
2.7 Users management