Quality and Accuracy of GPS Measurements †MyAssignmenthelp.com

Question: Discuss about the Quality and Accuracy of GPS Measurements. Answer: Introduction: In this data collection plan, the data that is going to be collected will be aimed at helping the related authorities to identify the asset damages that exist in the public space so they can be aware and take action against it. This data was collected by using GNSS receivers in different parts of the city, as well as taking photos and images to accompany those GPS point positions collected in a bid to show the authorities the kind of damage that exists on a particular asset. Before going to the field to carry out the data collection exercise, some preparation exercises were conducted. Firstly, the availability of all the necessary equipment including the GPS receivers and a Google Earth enabled laptop were done. In addition, the availability of chargers and cables was also done to ensure that once the exercise was done, it would not stop until all of the points had been collected. Next, the settings of these receivers were checked and configured, to ensure that all of the data collected was in the expected format to avoid the occurrence of errors during computations. In addition, since the accuracy of the data depends on the strength of the PDOP values of during the survey time to ensure that he data collected would be done on a low PDOP value, so that the accuracy of the data could be higher (Yuen, 2007). A data collection sheet where the data would be filled in to was also prepared for a more efficient data collection process. The receiver collected the coordinates of the different points in longitude and latitude, as well assigned each point a unique identity. These details were transferred and recorded in the previously prepared data sheet. All the attribute information for each point were also recorded in the data sheet and this was done for all the waypoints collected. After all the details of all the waypoints had been collected, the data was downloaded into the laptop using the cable. The dta was also backed up for insurance against loss of data management. The GNSS data receiver used was found to have accuracy levels that were within the range of 3m to 5m which is acceptable as the errors can be corrected by applying a differentia correction. The assessment the accuracy of the data collected by GNSS receivers can be conducted through vertical or horizontal accuracy(Sirgrist, Coppin, Hermy, 2009). These are established by comparing the data collected by a GNSS receiver of point whose coordinates are known and comparing them to the known figures. The accuracy level was achieved as a result of ensuring that the PDOP value during period when the survey was conducted was low(Wing, Erklund, Kellogg, 2009). Attributes table x Y elevation comment 150.954526 -33.804358 53.512856 MACKLIN ST 150.954278 -33.802424 46.326889 BILABONG ST SIGN 150.953115 -33.802381 38.742287 GILBA RD FOOTPATH 150.952658 -33.802675 43.145905 WARMAN ST PIT 150.973378 -33.808866 23.787344 VERON ST FOOTPATH 150.975418 -33.808865 22.566446 VERON ST CIVIL WORK 150.975253 -33.8156 31.951643 ESSINGTON ST CIVIL 150.973478 -33.816081 29.376648 BANSGROV ST 150.967175 -33.812262 35.046104 SMITH ST 150.958952 -33.808441 57.199833 ROWLY ST Some of the examples of GNSS enabled applications that have already been launched include The Graffiti app, although other applications are still being created and worked on, including Galileo that is being developed in the European Union. This application enables its users to collect waypoints and save attribute data on them. References Sirgrist, P., Coppin, P., Hermy, M. (2009). Impact of obstructions on the quality and accuracy of GPS measurements. International Journal of Remote Sensing, 20(1), 3595-3610. Wing, M., Erklund, A., Kellogg, A. (2009). Consumer grade GPS accuracy and reliability management. International Journal of Remote Sensing(103), 169-173. Yuen, M. (2007). Dilution of Precision Calculation for planning purposes. M.SC Thesis, 8(7).