Update README.md

README.md

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 license: cc-by-nc-4.0
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+This dataset contains visual inertial data for an experiment at the Catacombs section of an underwater cave in Devil's Eye Cave System, FL, USA.
+
+One dive was performed at the Catacombs section of the  Devil's Eye Cave System with durations of 55 (2024), while data were recorded for 39 minutes.
+Calibration targets (4-by-2 and 5-by-4) were deployed in two different locations and stayed fixed for the duration of the dive.
+
+The directory structure is as follows:
+
+- Configurations\
+--  april_3x5_10x10cm.yaml \
+--  april_4x5_4x4cm.yaml\
+--  GoProCamIMU.yaml
+- Ros2Bags\
+--  2024_Center/\
+--  2024_Left/\
+--  2024_Right/
+- COLMAP_SVIn2_MNemo_Trajectories\
+--  2024_Center_Colmap.txt \
+--  2024_Left_Colmap.txt \
+--  2024_Right_Colmap.txt \
+--  2024_Center_SVIn2.txt \
+--  2024_Left_SVIn2.txt \
+--  2024_Right_SVIn2.txt  \
+--  CatacombsLC.txt
+- Videos\
+--  2024_Center/\
+--  2024_Left/\
+--  2024_Right/
+- WaterDepthProfiles\
+--  2024_Perdix.csv/
+   
+### Citation
+If find this dataset useful, please cite: