Questions regarding longitude, latitude and altitude in the dataset #6
Description
First of all, thank you very much for making this valuable dataset open source. I have two questions about this dataset that I would like to consult you on:
The first question is about the method of obtaining the coordinates of the center point of the UAV aerial images. Are these coordinate data recorded through pre - determined navigation points? I have found that the pitch angle of the UAV in the collected data is very small (almost a directly downward view). Can it be considered that when the UAV flies to the set longitude and latitude position for marking points, the longitude and latitude of the central position of the collected image are the set values? Or what method do you use to determine the coordinates of the center point of the UAV aerial images?
The second question is about the detailed information on height. May I ask whether the height data in the dataset is the altitude above sea level or the relative height from the take - off position?