senseFly EBEE RTK - Processing Image Data; High Precision Geotagging with the Ebee RTK; Importing Images and Flight Data

Processing image data
5 Processing image data
Goal of this section: In this section you will learn how to import
images and flight data from your eBee RTK and create basic mapping
products directly in the field to gauge the quality of the images that
you gathered.
5.1 High precision geotagging with the eBee RTK
Both your eBee RTK and eMotion work exclusively in the WGS 84 reference frame:
• Images taken by your eBee RTK are geotagged with the precise position
of the drone when the image was taken. Geotags derived from GPS and
GLONASS signals are recorded in the WGS 84 coordinate system.
• Throughout eMotion, coordinates are displayed using the global WGS 84
reference frame. When you enter coordinates in eMotion, as latitude, lon-
gitude and elevation, they are assumed to be in WGS 84.
In order to create mapping products (for example, DSMs, orthomosaics) in Post-
flight Terra 3D that have their correct absolute positions with respect to your co-
ordinate system, you must carry out a coordinate transformation:
• Latitude and longitude are converted to x,y coordinates in your coordinate
system.
• Elevation (height above ellipsoid) is converted to absolute z coordinate by
applying a vertical displacement constant, the Geoid-Ellipsoid Separation.
5.2 Importing images and flight data
The next step to creating mapping products, after completing a flight, is to im-
port the raw images and log files to a computer. The eBee RTK records flight data
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