From field survey data and manual calculation, it is observed that manual calculation of distance and area is more accurate than that of Google Earth Pro measurements.ĭue to their mobility, high velocities, and common occurrence, small‐volume pyroclastic density currents (PDCs) represent a major hazard around volcanoes. Therefore, this research aims to investigate the accuracy in distance and area of selected location using Google Earth Pro (GIS application software). But accuracy of GIS is need to be determined for getting the precise measurements. On the other hand, recent development in Global Information System (GIS) made this task easy to perform by remote sensing and using Global Positioning System (GPS) application based software. require time and financial help to accomplish the task. Manual surveying using chains, taps, level machines etc.
Certain time Civil engineers requires preliminary survey data regarding the distance between two points or area of particular place quickly for deciding the possible alternate routes and knowing the area of particular location accurately. But among all, the most important factor is time required to accomplish the particular task. Measuring the long distance and larger area is always remained tedious job for surveyor due to various factors like it consumes more time, bad weather, error in instruments being used etc.
0 kommentar(er)
