Data Series 857

Baseline Coastal Oblique Aerial Photographs Collected from Breton Island, Louisiana, to the Alabama-Florida Border, July 13, 2013

Navigation Data

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Navigation files were extracted as a comma-delimited American Standard Code for Information Interchange (ASCII) text file from a Garmin GPSMAP 60CSx, a handheld GPS. For each trackpoint, the Garmin GPSMAP 60CSx recorded the following: latitude, longitude, date/time, altitude, depth, leg length, leg time, leg speed, and leg course.

Images were acquired using a Canon EOS Rebel T2i. The camera was synchronized to UTM and the time of capture recorded in the EXIF header of each image. Image files are named according to the time they were captured. The image file name has the format yyyy_mmdd_hhmmssd.jpg (for example, image 2013_0713_133636d.jpg was taken July 13, 2013, at 13:36:36 Universal Time Coordinated (UTC), while "d" designates a digital camera was used.) Images are associated with GPS positions according to the time of capture, with verification using Google Earth to view selected images during the flight based on their time of capture compared to the recorded position of the aircraft at that time in the GPS record.

Processed Navigation

The processed navigation file can be accessed from within the nav folder or by clicking the following link: 13cch07.csv (CSV file). The file contains 12 fields that are defined as follows:

Field 1: LONGITUDE - estimated longitude (decimal degree) position of aircraft
Field 2: LATITUDE - estimated latitude (decimal degree) position of aircraft
Field 3: HR_MIN_SEC - hour_minute_second (UTC)
Field 4: IMAGE - image filename (year_monthday_hhmmssd.jpg)
Field 5: IMAGE_URL - internal to data series location of the image
Field 6: CONTACT_SHEET_URL - internal to data series location of the contact sheet
Field 7: YEAR - year the photo was taken
Field 8: MONTH - month the photo was taken
Field 9: DAY - day the photo was taken
Field 10: PRE_POST - type of survey conducted (pre- or post-storm)
Field 11: STORM - (baseline or name of the storm)
Field 12: GEO_AREA - locations surveyed

Raw Navigation

Navigation files were extracted as comma-delimited ASCII text files from a Garmin GPSMAP 60CSx. For each trackpoint, the Garmin GPSMAP 60CSx recorded: latitude, longitude, date/time, altitude, depth, leg length, leg time, leg speed, and leg course.

The raw navigation files can be accessed from within the nav folder or by clicking the following link: 13cch07_0713_gpsmap.txt (text file). The file contains nine fields (separated by a space) that are defined as follows:

Field 1: HEADER: "Trackpoint"
Field 2: POSITION - latitude (N degrees, decimal minutes), longitude (W degrees, decimal minutes) position of aircraft
Field 3: TIME - Date and Time (m/d/yyyy hh:mm:ss am/pm)
Field 4: ALTITUDE (feet)
Field 5: DEPTH - blank
Field 6: LEG LENGTH (feet)
Field 7: LEG TIME (hh:mm:ss)
Field 8: LEG SPEED (mph)
Field 9: LEG COURSE (degrees "true")