Currently, the Aviatrix software produces data that is recorded and associated with each trigger point, but does not connect data from the camera (i.e., camera name) to these records. In order to calculate area for each photo that contains STEI, we would like to know the altitude of that photo. Therefore, we need to combine the Aviatrix data for each trigger point to the photo name that was taken at that trigger point. Spatial data collected by the GPS in the Aviatrix triggerbox along with camera and computer clock data is assembled to align spatial data (altitude and position data) with the imagery, mainly in order to assign the correct altitude to the images to calculate ground area within the photo frame.To do this, there are currently three methods (at least until Aeroscientific can make it a default function in the Aviatrix software). The first, and probably the best, is to use the Aerosci software FlightPlanner to post process the data (Aerosci offers a trial version and a one-time cost of approximately $1600 will purchase this software). The second option is to use the script developed by USGS Emily Weiser that combines the two datasets. The last option is to do it by hand using camera and Aviatrix clock times (Dave Safine USFWS pers. comm.).
The explanation and instructions for these options are in the document:
Combining Aviatrix & Photo Data.docx
