Abstract
At present, outcrops of Ordovician rocks in the territory of the Altai Mountains are being investigated. One of the methods of geological research is the use of geoinformation technologies. In free access for researchers, one can find only diagrams and maps without coordinate reference to the territory of the Altai Mountains. The article deals with the problem of the lack of free access to thematic digital maps for Altai researchers studying geology and paleontology of the Ordovician period. The results of the study of geological sections of Ordovician age are presented, the coordinates of outcrops of Ordo-vician rocks are obtained, and the lithology and taxonomic composition of faunal groups are de-scribed. For web-GIS, a cartographic basis was prepared, a database structure was developed, elements of thematic content have been plotted. A trial version of the NextGIS Web server geoinformation system was chosen as a software product for publishing the developed web-GIS.
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