Investigating the Shortest Survey Route in a GNSS Traverse Network

Upon the progress in the satellite positioning systems after 1990\u27s particularly, Global Positioning System and Global Navigation Satellite System (GNSS) networks have been setup and used in scientific researches. Operational Research (OR) techniques have been used in the design and optimization of the surveying networks based on GNSS, as well. After 2000\u27s, both developed and developing countries have launched and developed Continuously Operating Reference Stations (CORS) networks for surveying procedures, which require precision to the centimetre. Surveying the detail points by creating traverse networks in the field may be realized thanks to the accuracy of the position obtained. Although many researches in the field of the design and optimization of the GNSS networks exist, finding the shortest route in the survey of such networks remained limited. Objective of this study is to find the shortest survey route in a traverse network created in the CORS-Turkey (CORS-TR) system. Based on the optimum solution of Traveling Salesman Problem we form the best route and timing plan

Mapping of environmental consciousness levels of university students: an application in Turkey

Environmental education promotes the environment-related values, attitudes, and concepts enabling the individuals to raise environmental consciousness. Moreover, it is also the process of continuous learning that provides knowledge, value, skill, and experience in order to solve the environmental problems for bequeathing a healthy and clean environment to the next generations. The most effective solution for eliminating the environmental problems and struggling with these problems is to raise the individuals having the environmental consciousness. The objective of this study is to measure the environmental consciousness of Erciyes University students by using survey, to evaluate by using decision-making methods, and to map the obtained results based on Geographical Information System (GIS). The survey was conducted with 500 students studying at Erciyes University, the weighting process was performed using analytic hierarchy process (AHP), and the responses given to 41 questions were transformed into a single environmental consciousness conformity value by using weighted linear combination (WLC). Inverse distance weighting (IDW) interpolation method was applied to the obtained conformity values, and the raster map of environmental consciousness was obtained. The study adopts a new approach to mapping and evaluation of environmental consciousness of university students

Accuracy assessment of noise mapping on the main street

Among the sounds constituting a part of our daily lives, the undesired and disturbing ones are named noise. The noises can be defined as the acoustic energy that affects the physiological and psychological welfare of humans due to its direct or indirect effects on the human health. But, the traffic noise, which is one of the disturbing noises having wide dispersion in urban areas, affects the health of a gradually increasing number of people. The number of studies on measurement, dispersion, and mapping of traffic noise in developed and developing countries is gradually increasing. It can be seen that the studies concentrate on mapping based on the city centers and neighborhoods, where the traffic is intense. In this article, unlike the regional noise measurement studies, the transversal cross sections were established with a certain interval according to the land status along the main street, and the noise measurement points were determined using the global navigation satellite system (GNSS). The daily mean noise levels (L-den) were calculated by performing the measurements at daytime, evening, and nighttime. Using ArcGIS 10.4 software, the accuracy of noise maps created via inverse distance weighting (IDW), radial basis function (RBF), and ordinary kriging (OK) geostatistical analysis interpolation methods and the dispersion effect of traffic noise were compared. According to the visual method and error corrections, it was found that the best noise map was obtained using the RBF method. It is believed that the map provides accurate and reliable results because of the flat land surface, higher noise values measured on the road region, decrease in the noise at the points farther from the road region, and soft transitions between the noise values depending on the distance from the road. In order to take measures in order to decrease or eliminate noise on the main street, the local administrators and decision-makers can make use of these maps, the accuracy of which has been confirmed