Data collected in the field is fundamental to train algorithms for data processing and to validate final products obtained by analyzing remote sensing information. In this project, the coordinates of different objects (e.g reeds, water surface, docks, shoreline) were needed to model aquatic reed beds using Light Detection and Ranging (LiDAR) and close-range aerial photogrammetry (unmanned aerial systems).


The coordinates of an unknown point relative to a known coordinate can be determined using the total station as long as a direct line of sight can be established between the two points. Angles and distances are measured from the total station to points under survey, and the coordinates (X, Y, and Z or easting, northing and elevation) of surveyed points relative to the total station position are calculated using trigonometry and triangulation. To determine an absolute location a Total Station requires line of sight observations and can be set up over a known point or with line of sight to 2 or more points with known location, called free stationing.