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... In the literature available, there is a lack of studies on fast travel time mapping designed for the general public, taking into account the whole territory of the city and Internet public transport journey planners. Rare studies are based on data collected manually (Tomala et al. 2014), which is time-consuming and results in inefficient delivery of frequently changing information based on changes in timetables, bus routes, etc. Therefore, the aim of the study presented is to fill this gap and provide the solution for fast and accurate travel time mapping. ...
This article presents the research on time accessibility of public transport. The study concerned the territory of Szczecin and travelling from anywhere in the city to the Main Railway Station. A self-gathering measurement data method was used, which was developed by Authors in earlier studies. Szczecin was selected as the test area because of the shape of the city as well as the location and shape of the excluded areas (areas not accessible to pedestrians or cyclists). Two travel maps were created, for daytime and nighttime public transportation. The study used 162 measurement points arranged in 1x1 km grids. Travel times to the Main Railway Station were calculated with the use of the jakdojade.pl online service. They were calculated for each measurement point and these values were then interpolated with the IDW method. The travel time maps were evaluated by computing the absolute error on the basis of 10 control points. The absolute error was not greater than 4 minutes, what proves very good accuracy of research. The results of the analysis were compared with the population distribution in Szczecin. The interdependence of population distribution and accessibility of the Main Railway Station was analysed.
... Travel times calculated in this way cannot properly determine the times of access from places anywhere in the region (city, district) e.g. between large densely populated settlements. Moreover, travel time mapping based on data collected manually [8] is time-consuming, which results in inefficient delivery of frequently changing information based on changes in timetables, bus routes etc. ...
... Travel times calculated in this way cannot properly determine the times of access from places anywhere in the region (city, district) e.g. between large densely populated settlements. Moreover, travel time mapping based on data collected manually [8] is time-consuming, which results in inefficient delivery of frequently changing information based on changes in timetables, bus routes etc. ...
The article presents an analysis of travel time mapping with a self-acting measurement data gathering method -- developed by the authors -- with an identic grid with a mesh equalling 500x500 m. Time availability was examined in two cases: Warsaw Frederic Chopin Airport and Central Railway Station in Warsaw. Research was based on travel by public transport on a weekday. All data was obtained from the jakdojade.pl Internet service, which determines travel time. Data collected in measurement points was interpolated to the whole territory of Warsaw by the IDW method. Areas impossible to traverse on foot or by public transit due to their topographical features were removed from the interpolation area. To check the quality of results achieved, 20 control points were used to calculate absolute errors of final data. The actuality of studies presented in the article is the end of March 2016.
... Rys. 1. Lokalizacja punktów pomiarowych i kontrolnych W celu wyznaczenia czasów podróży z każdego miejsca w mieście wykonano interpolację wyników uzyskanych dla punktów pomiarowych. Do interpolacji wykorzystano metodę odwrotnych odległości -IDW (Inverse Distance Weighted), stosowaną także we wcześniejszych pracach Autorów [12]. Bielecka i Bober [1] twierdzą, że jest to najdokładniejsza metoda interpolacji. ...
This article presents the results of research on travel time to the nearest Hospital Emergency Department (SOR) from anywhere in the city.
The study was conducted on the example of Warsaw. All 10 hospital emergency departments operating in the capital were taken into consideration. The measurement points, for which travel times were calculated, were 110. The travel times were calculated at morning (8:00), afternoon (16:00) rush hours and off-peak hour (12:00). To calculate accessibility from anywhere in the city, data interpolation with the use of the IDW (inverse distance) method was done. Calculated travel times are from 3 to 28 minutes.
Analysis of the results accuracy was based on the 15 control points other than the points used in the interpolation process.
The results were analyzed to indicate reasons that may have an impact on long journey times from certain areas of the city.
W referacie przedstawiono możliwość wykorzystania analiz przestrzennych w celu opracowania map dostępności komunikacyjnej Wyższej Szkoły Inżynieryjno-Ekonomicznej (WSI-E) w Rzeszowie. Analizy wykonano dla podróży transportem publicznym (autobus) oraz samochodem osobowym. Zebrane dane dotyczą dnia powszedniego (wtorek) w godzinach porannego szczytu komunikacyjnego (godzina 8.00). Do wyznaczenia dostępności czasowej każdego miejsca w mieście wybrano metodę interpolacji IDW (Inverse Distance Weighted) – metodę średniej ważonej odległością. Wyniki interpolacji zaprezentowano na mapie w formie linii łączących punkty o jednakowej dostępności czasowej (izochrony). Przeprowadzono także analizę dokładności, która potwierdza wysoką wiarygodność wykonanej interpolacji danych pomiarowych – błąd bezwzględny nie przekracza 5 minut.
The aim of the paper is the analysis of new free satellite images of mining area. Test study is located in south-east Poland near Tarnobrzeg city, where in the past sulphur was intensively mined on the large area. Sulfur was developed in open-pit mine Machów and by using drilling technology in Jeziórko. During the mining activities, soils on the mining area were polluted by sulfur. Moreover, it has changed water conditions due to the continuous drainage of the area around the mine. As a result of reclamation the plant succession can be observed. Since 2006 when the drainage was stopped, the groundwater flooding occurs in large area. Application of the new satellite images, nowadays free of charge, for the vegetation succession and flooding process monitoring was analyzed. New and archive satellite images were obtained (Aster, Landsat, Sentinel) and few indices were tested for monitoring and for delimitation of flooding area.
Abstracts of scientific papers submitted to the Baltic Geodetic Congress (Geomatics) - 2-4.06.2016, Gdansk, Poland (1st ed.)
Persons listed as authors are editors of the book. Full list of authors is given in the source file:
http://www.geomatyka.eu/publikacje/isbn9788393460946/isbn9788393460946.pdf
