A Photogrammetric Method for Spatial Data Extraction from Google Earth and Improvement with Precision Analysis
محل انتشار: ژورنال مهندسی عمران، دوره: 4، شماره: 4
سال انتشار: 1397
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 492
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شناسه ملی سند علمی:
JR_CEJ-4-4_017
تاریخ نمایه سازی: 6 آذر 1397
چکیده مقاله:
Topography maps are crucial for civil engineering projects, such as road construction, water channel construction, urbanconstruction, and mining. Here we present a method which enables us to extract topographical map via modeling GoogleEarth and some field works. In this method, first, we model Google Earth as an object with closed-range photogrammetricmethod in the Agisoft Photoscan. Through some field works, we measured twenty-two points including twelve groundcontrol points (GCP) and ten independent check points (ICP). Due to these GCPs, we were able to transform our model toreal world with global polynomial and multi-quadratic equations and ICPs were used for precision analysis. This methodis easy and cheap to obtain spatial data and the accuracy is sufficient for research requirements.
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نویسندگان
Sadegh Karimi
Department of Geomatics Engineering, K. N. Toosi University of Technology, Tehran, Iran
Ehsan Khorrambakht
Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran