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| Author | Włodarczyk-Sielicka, Marta |
| Affiliation | Marine Technology Ltd. 6 Cyfrowa St., biuro B.3.04a, 71-441 Szczecin, Poland |
| m.wlodarczyk@am.szczecin.pl | |
| Author | Bodus-Olkowska, Izabela |
| Affiliation | Maritime University of Szczecin, Faculty of Navigation, Institute of Geoinformatics 1–2 Wały Chrobrego St., 70-500 Szczecin, Poland |
| i.olkowska@am.szczecin.pl | |
| ISSN printed | 1733-8670 |
| URI | https://repository.am.szczecin.pl/handle/123456789/2395 |
| Abstract | Mobile navigation for inland shipping is an example of a GIS system dedicated for recreational users using inland waterways. Developing this system is a primary purpose of the research project “Mobile Navigation for Inland Waters” funded by the National Centre for Research and Development under the program LIDER. System assumptions include the development of a dedicated model of mobile cartographic presentation, taking into account the generalization of data. This article is focused on simplification of line and polygon features, included in the spatial data model MODEF (MObinav Data Exchange Format), which is used in the created system. During the simplification of line features, the Douglas-Peucker algorithm was mainly implemented. During the simplification of polygon features, a simplification method was applied, maintaining the basic shape and size of the objects. A simplification tolerance parameter and a parameter determining the minimum area of the object was also used. In addition, objects within a certain distance were merged. A smoothing tool for the shape and size of buildings and the PEAK method (Polynomial Approximation with Exponential Kernel) were used as well. Furthermore, a selection tool was employed and features with minor importance to the user were deleted during navigation mode. Given the requirements of the future user of the system, a separate model simplification for each of the layers of the system was created; these models are combinations of the methods listed above. The overriding factor that has been taken into account during the research of simplification methods, was the limitation of the sharpness of human eyes. The study of generalization methods was carried out in ArcGIS software. |
| Pages | 105-111 |
| Publisher | Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie |
| Keywords | inland shipping |
| Keywords | simplification |
| Keywords | geodata integration |
| Keywords | mobile systems |
| Title | Simplification methods for line and polygon features in mobile navigation systems for inland waters |
| Type | Original scientific article |
| References |
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| ISSN on-line | 2392-0378 |
| Language | English |
| Funding | The research presented in this paper has been conducted in the context of the ‘‘Strategic and Operational Risk Management for Wintertime Maritime Transportation System” (BONUS STORMWINDS) project. This has received funding from BONUS, the joint Baltic Sea research and development programme (Art 185), funded jointly from the European Union’s Seventh Programme for research, technological development and demonstration, and by the Academy of Finland. The financial support is acknowledged. The AIS data used in the traffic analysis was made available by the Finnish Meteorological Institute, based on an agreement with the Finnish Transport Agency regulating access to historic AIS data for scientific research purposes. The presented Bayesian Network models have been developed using GeNie modelling environment developed at the Decision Systems Laboratory, University of Pittsburgh, available from http://genie.sis.pitt.edu. Publication funded by the Ministry of Science and Higher Education of Poland from grant No. 790/P-DUN/2016 for the activities of promoting science (task No. 3 “Publications of foreign, distinguished scientists and their participation in the scientific board”). |
| Figures | 6 |
| Tables | 0 |
| DOI | 10.17402/223 |
| Published | 2017-07-06 |
| Accepted | 2017-06-08 |
| Recieved | 2017-04-29 |
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50 Scientific Journals of the Maritime University of Szczecin, no. 50 / 2017
50 Scientific Journals of the Maritime University of Szczecin, no. 50 / 2017