The GIS data derived from the "Geological Map of the Polish maritime areas for the purpose of so-called Additional Military Layers" issued by the Polish Geological Institute in 2012. The study on a scale of 1:200 000 shows lithological diversification of surface sediments within the Polish maritime areas according to the R. L. Folk classification (1954) distinguishing 15 different lithological types of sediments. Additionally, the areas where boulders occur in the midst of sand and gravel deposits were identified. The map was prepared according to the defence standard NO-06-A058-5.

Geological -tourist map of Romincka Primeval Forest Landscape Park in scale 1:40 000 is one of the 5 part series of maps, commissioned by the Ministry of Environment, a project financed by the NFEPandWM.

The data were obtained in the course of implementation of the “Atlas of lithological parameters of surface sediments of the southern Baltic Sea with special emphasis on geological and mining conditions of occurrence of aggregate deposits”, which was developed by the Polish Geological Institute and released in 2005. The Atlas includes maps of main grain size classes, mean grain size and sorting as well as content and composition of heavy minerals. The analysis of lithological parameters was the basis for determination of prospective areas of occurrence of aggregate deposits in Polish maritime areas.

The data come from the "Geochemical Atlas of the Southern Baltic", which was developed by the Polish Geological Institute and released in 1994. The Atlas covers the Polish maritime areas. In the sediment samples from the 368 sites the content of Corg., Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mn, Ni, P, Pb, S, Sr, V and Zn was determined. The analysis of sediment grain size was also carried out. It allowed to estimate the geochemical state of the surface layer of sediment and to determine changes that occurred as a result of the intensive development of economic activities in the catchment area of the Baltic Sea in the last 100-150 years.

Data were derived from the study: "Recognition and Visualisation of the Geological Structure of the Gulf of Gdańsk for Natural Resources Management", which was developed by the Polish Geological Institute and released in 2008. The geological research carried out in the framework of the project aimed to specify the geological recognition of the Gulf of Gdansk and to visualize the morphology, sediment distribution, dynamic processes occurring at the bottom and the Quaternary sediments structure, with special emphasis on the Late Glacial and Holocene. One of the most important tasks was to obtain current detailed information about the geochemical status of the surface sediments. The seismoacoustic methods used have identified geological structure to a depth of 10 to 50 m b.s.l., depending on the geological structure of the bottom and the water depth.

The data were obtained in the course of implementation of the “Geological map of the Baltic Sea bottom without Quaternary deposits 1:500 000”, which was developed by the Polish Geological Institute and published together with explanatory notes in 1999. The map shows the geological structure and morphology of the pre-Quaternary surface. It is complemented with geological cross-sections and seismic profiles. The map was based on new geophysical surveys using high resolution seismic reflection by which the geological structure of the area to a depth of several hundred meters was recognized.

The data were obtained in the course of implementation of the “Geological Atlas of the Southern Baltic 1:500 000”, which was developed by the Polish Geological Institute and released in 1995. The Atlas consists of 34 thematic tables and explanatory text. Much of the tables show the geological structure - from the crystalline basement surface map to the map of contemporary bottom sediments. They are combined with geological cross-sections as well as selected and well documented drilling profiles. The aim of the Atlas was to summarize knowledge of the geological structure and evolution of the southern part of the Baltic Sea basin.

The GIS data were obtained during digitalisation the "Geological Map of Baltic Sea bottom of 1: 200 000" issued by the Polish Geological Institute in 1989-1995. The basic content of map includes lithological diversification of the southern Baltic surface sediments and their origin. In addition, if the surface layer has a thickness of less than about 20 cm, the underlying deposits are also shown. The basis of sediment types distinction was F. P. Shepard classification (triangles classification) using Wentworth grain classes. In classification applied sand is additionally divided into four subtypes. The map area is covered by 17 grain size types and subtypes of surface sediments.