id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_rziqnt2ahrbgld2eu5dpbbmrqq	J. A. Gonçalves	POLE PHOTOGRAMMETRY WITH AN ACTION CAMERA FOR FAST AND ACCURATE SURFACE MAPPING	2016.0	5	.pdf	application/pdf	3523	305	65	KEY WORDS: High resolution, Orientation, Point Cloud, Accuracy, Change Detection High resolution and high accuracy terrain mapping can provide height change detection for studies of erosion, subsidence or land A UAV flying at a low altitude above the ground, with a compact camera, acquires images with resolution appropriate for these Marked ground control points are surveyed with GNSS for precise georeferencing of the stations is now very fast (5 seconds per point), which results, together with the image collection, in a very fast field work. improved accuracy is needed, since image resolution is 1/4 cm, it can be achieved using a total station for the control point survey, The area covered by a vertical image taken at 4 meters height Precise image orientation requires ground control points, with accuracy provided by the real time processing were, on average, the height check points, only 23 were surveyed with total images oriented with total station points.	./cache/work_rziqnt2ahrbgld2eu5dpbbmrqq.pdf	./txt/work_rziqnt2ahrbgld2eu5dpbbmrqq.txt