The presented research concerns the methodology for selecting settlements and road networks from 1:250 000 to 1:500 000 and 1:1 000 000 scales. The developed methodology is based on the provisions of the Regulation of the Ministry of Interior from 17 November 2011. The correctness of the generalization principles contained in the Regulation has not yet been verified. Thus this paper aims to fulfil this gap by evaluating map specifications concerning settlement and road network generalizations.
The goal was to automate the selection process by using formalized cartographic knowledge. The selection operators and their parameters were developed and implemented in the form of a generalization model. The input data was the General Geographic Object Database (GGOD), whose detail level corresponds to 1:250 000 scale. The presented research is in line with works on the automation of GGOD generalization performed by the National Mapping Agency (NMA) in Poland (GUGiK). The paper makes the following contributions. First, the selection methodology contained in the Regulation was formalised and presented in the form of a knowledge base. Second, the models for the generalization process were developed. The developed methodology was evaluated by generalizing the settlements and roads in the test area. The results of the settlement and road network generalization for both 1:500 000 and 1:1 000 000 detail levels were compared with the maps designed manually by experienced cartographers.
This paper gives a visualization of the territorial origins of the population of the Recovered Lands (Poland) in 1950. It constitutes a map series, based on Kosiński’s research from 1960, presenting data from the first post-war census. Vector data of the historical administrative borders of Poland was used to prepare the maps; specifically the administrative division of the People’s Republic of Poland from 1946 and the state border of the Second Republic of Poland from 1931. The administrative borders were modified as appropriate using, among other things, historical maps and satellite images. The results of this research constitute a comprehensive study on the origins of the population of the Recovered Territories. Twenty-four maps were designed, showing many aspects of the studied phenomenon.
Of the numerous applications of GIS, administration and public services count among the main fields of application. They are both the users and the owners of the largest amount of spatial data. Portals for higher authorities have been the subject of extensive discussions, but the development and possible use of GIS systems in the form of geoportals at local levels still seems to have been insufficiently discussed. This article presents the process of designing and developing a portal for the lowest authorities - local authorities and the local community. A small town in Poland, Sokółka, was assumed as the study area. The concept development was preceded by, among others: recognition of the needs of an administrative unit in conducting spatial policy; establishment of the objectives, functionalities and assumptions of the designed GIS; a SWOT analysis of the designed geoportal; and an analysis of data resources. Pilot implementation was completed with an evaluation of the geoportal encompassing various groups of potential users.
The main objective of this study is to evaluate the changes in the hydrographic network of Słowiński National Park. The authors analysed the changes occurring in the drainage network due to limited maintenance in this legally protected natural area. To accomplish this task, elaborations prepared on the basis of aerial photographs were used: an orthophoto map from 1996, hyperspectral imaging from June 2015, and a digital terrain model based on airborne laser scanning (ALS) from June 2015. These spatial data resources enabled the digitisation of the water courses for which selected hydro-morphological features had been defined. As a result of analysing the differences of these features, a quality map was elaborated which was then subjected to interpretation, and the identified changes were quantified in detail.