Processing of the Results of Satellite Inland Positioning Transport Using Mobile Devices and Their Visualization

Małgorzata Kulas

doi:10.26552/com.c.2022.1.e36-e48

Abstract

The issue of spatial data visualization is currently an important element in the positioning and navigation process. The constant trend in increasing the accuracy and availability of position modules affects the widespread use of the mobile devices in transport. The paper presents creation of a three-dimensional visualization model based on ground tracks recorded in NMEA (National Marine Electronics Association) and GPX (GPS Exchange Format) formats. Additionally, the study presents an analysis of the positioning accuracy including the sky obstructions presence and the instantaneous state of the satellite constellation. The significant deterioration in positioning accuracies was noted due to the presence of sky obstructions and low movement speed during data recording. The analysis of these parameters showed the dependence of the positioning accuracy with the number of visible satellites and the HDOP (Horizontal Dilution of Precision) parameter.

Highlights

Satellite positioning is widely used in both maritime and land transport
The paper presents the process of creating a visualization based on routes recorded by the mobile devices GNSS receivers
The NMEA and GPX formats require that saved positional data be processed and saved in KML format to be recognized by the Google Earth software

Summary

Introduction

Satellite positioning is widely used in both maritime and land transport. The practical application of astronavigation in marine navigation has been almost eliminated by the global satellite navigation systems [1]. Based on the readings of the GNSS (Global Navigation Satellite System) sensors, the current position of the ship is determined and it is related to the electronic map [3]. Concerning the land transport, the issue of the spatial data visualization is related to connection of positional data with the environment. In the period of rapid development of information and geospatial technologies, on-line numerical maps are widely used [4,5]. Another level of detail is imaging based on photogrammetric imaging [6], LIDAR (Light Detection and Ranging) aerial laser scanning [7] and terrestrial laser scanning [8]

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