Identify distinct sample sessions from timelapse image data

For each deployment label, this function:

• Sets sampling_start as first image date

• Counts photos (total, and motion-detection)

• Determines gaps in sampling period due to obscured lens

• Determines total length of sample period (number of days with Time Lapse photos - number of days with lens obscured)

Usage

make_sample_sessions(
  image_data,
  sample_start_date = NULL,
  sample_end_date = NULL
)

Arguments

image_data

data.frame of class image_data, as read in by read_image_data().

sample_start_date

a custom start date. Note that this will apply the same start date to all deployments/sessions in the data.

sample_end_date

a custom end date. Note that this will apply the same start date to all deployments/sessions in the data.

Value

a data.frame of class sample_sessions with one row (sample session) per deployment