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<p>Analysis and synthesis of domestic and global trends in the development of methods of geoinformation mapping presents that the ever growing need for spatial information in various spheres of modern society, the use of modern access technologies and the transfer of spatial information, determine the transitional stage of the development of cartography to “mapping based on geoinformation resources”. A great demand for spatial information contributes to the creating and using of a large number of network information resources that provide mapping tasks. These network information resources are the main condition for using modern geo-information technologies for solving scientific and practical problems.</p><p>Mapping based on geo-information resources allows one to expand the range of using heterogeneous spatial data, to increase the audience and shorten the way to the end user when presenting cartographic materials and improve the efficiency of working with cartographic materials due to the technologies of graphical representation of information and control of the content of the resource [Lurye I., Alyautdinov A., Osokin C., 2013]. The development and use of geo-information resources are aimed at creating a uniform information space, as the most effective tool for researching the natural environment and its management.</p><p>The paper describes the technology of development of the information-retrieval system “Absolute dates of alluvial deposits”, realized as a geo-information resource. Using network technologies allows providing access to the system resources for all interested users. The relational database of spatial data is used as a basic element of the developed information and retrieval system. Spatial database is a set of separate tables linked by logical links of different relations. Much attention has been paid to the creation of a cartographic service which allows displaying and classifying information as well as using the spatial query tool and different cartographic bases, including remote sensing materials. </p>