The geographical informatikon (TOP50_LT) update for the city of Sakiai and submission to the user

Abstract

The comparison analysis of the received data is complete. Results – Linear, areal and point layers of spatial data of the years 2013 - 2016 were updated and analysed for the Sakiai district. Major changes were identified in the forest areas as well as the linear road layers. Based on this information, it can be assumed that nature and our environment is constantly changing and therefore it is extremely important to keep updating the digital spatial data. It was established that out of all areas, the plot area of forest changed the most. It increased by 840.74 hectares. Out of all layers, the largest changes were found in the layer of roads. The number of road lengths has increased from 1324.25 to 1412.42 kilometers. 335 new point objects were created, of which 134 are point objects of plants, 87 homesteads, 85 buildings, 18 towers and 11 other objects. The total number of these point objects from 2013 to 2016 increased from 2196 to 2531 units. The increase of almost all objects took place at the expense of the cultivated land, therefore the area of it significantly decreased. The updating and presentation of recently georeferenced cartographic data is very important, as it serves as a basis for planning, designing and analysing the processes of land cover change. (Gudritiene, 2016). The law of geodesy and cartography in the Republic of Lithuania determines the management of cartographic works, principles and peculiarities of the compilation of geographic information system data sets (Lietuvos..., 2001). Spatial data is a digital representation of the data describing the geographical location, form, interconnections and uniqueness of the analysed object. (Papisiene, 2014). The research object was the year 2013 TOP50_LT data collection of the Sakiai district. The purpose of this research was to perform the year 2013 Sakiai district TOP50_LT spatial database update while referring to the year 2016 ORT10LT map data interpretation. The following tasks for this research were to perform an overview of the existing Lithuanian territory spatial data, to perform the year 2013 Sakiai district TOP50_LT spatial database update while referring to 2016 ORT10LT map data interpretation and to perform the spatial data range analysis of the Sakiai district during the years 2013 - 2016. In terms of research methods, this paper analyses regulation documents as well as various scientific, specialised and foreign literature sources. The paper also analyses the cartographic history and Lithuanian (as well as foreign) spatial data and its possible uses and looks at the legislations governing this area. ArcMap 10.2.2 software and computer databases were used to aid the completion of this paper, while topographical and orthophoto maps were also analysed. While researching the geographical map data, scientific methods such as comparison, modelling, summation and graphical visualisation were used. In the process of updating the topographical map, various cartographic material was referred to as well as methodological advice and orthophotographs.