UNIGIS Abschlussarbeiten

Der krönende Abschluss eines UNIGIS MSc Studiums ist sicherlich die Master Thesis. Mit ihr belegen unsere MSc-AbsolventInnen, dass sie den akademischen Grad "Master of Science (Geographical Information Science & Systems)" zu Recht führen.  Im UNIGIS professional Studiengang muss keine Abschlussarbeit verfasst werden. Dennoch nehmen einige Studierende die Möglichkeit war, ein Geoinformatikprojekt durchzuführen und entsprechend zu dokumentieren.

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René Pitschke [06-2012]:

Potenziale kinematischer GPS -Messungen mittels einfacher C/A Code Empfänger

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GIS data GPS collection currently based on DGPS C/A code receiver in the price range of 3000 to 8000 Euro, but also simple C/A code receiver, which are often referred to as a low cost receiver were used. The type and cost of the DGPS units are almost unchanged for several years. The potential suitability of low-cost receivers for kinematic measurement of area, perimeter and location of small objects in the range of about 100 square meters is examined in this master thesis. The estimation of the position of the measured objects have a subordinate role, but may not exceed a positional accuracy (68% probability) of five meters. The position of the individual vertices of a measured object contrast to each other must be more accurate, not to exceed the required tolerances of ± 10% of the total surface area or length. What requirements must comply with the GPS receiver and can determined quality parameters, so that the measurements in this region have the necessary accuracy? Furthermore, the effect of a differential correction is examined for the measurement results. To realize simultaneous, controlled measurements and data recording, a own program was created, because there is currently no such program available that provides all required functionality. In addition, a carrier system to fastening the three GPS receivers, and the notebook has been developed. First, in this master thesis are described the operation of GNSS systems (specifically, the GPS), the possible sources of error in the use of GPS receivers and the NMEA1083 data format which is most used for communication. Thereafter, the development and the application of GPS NMEA tester program are described. This software, which was used successfully, was specifically developed to measure and record the data. Following the used GPS receivers are described and analyzed the results of various measurements and analyzes. The analysis of the data revealed for the studied GPS receiver accuracy to the different criteria mentioned above. The measurements also revealed highly variable accuracy. An analysis of how much "good" and "bad" measurements during the measurement are distinguishable, showed that the available quality parameters such as PDOP, minimum elevation angle, signal / noise ratio and number of satellites give no indication of a distinction. It is shown that at least the required accuracy of area of ± 10 percent of any of the examined GPS receiver has been complied with. The use of a simple, personal reference correction could not improve the result. Keywords: GIS data collection, C/A code, Low-Cost receiver, precision, quality parameters, difference measurements

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