MoveApps
Github repository: https://github.com/ctmm-initiative/ctmmMoveApp_speeddistance
This app estimates the average speed an animal moved based on a continuous-time movement model that had been fitted to the data using the App "Fit a Continuous-Time Movement Model (ctmm)" before. By multiplication of the estimated speed and the time the animal was tracked a distance that the animal moved is estimated.
Given a ctmm movement model and telemetry data, multiple realizations of each individual's trajectory are simulated to estimate the time-averaged speed. These speeds are then proportional to distance traveled. Both tortuosity (non straight-line motion between the data) and telemetry error are accounted for.
This app can be used in a ctmm-worklfow, once a continuous time model was estimated ("Fit a Continuous-Time Movement Model (ctmm)" App). For more details about the method, please refer to the accompanying publication and the reference of the speed function in the ctmm package.
The app requires a ctmm model with data as input.
The app returns the input ctmm model with data as output.
speed.csv: The estimated average speed for each animal. The table consists of five columns, which are: est the estimated speed with a lower (low) and upper (high) confidence interval, the units (unit) and id of the animal.
distance.csv: The estimated total distance traveled for each animal. The table consists of five columns, which are: est the estimated distance with a lower (low) and upper (high) confidence interval, the units (unit) and id of the animal.
none
Please make an issue here if you repeatedly encounter a specific error.
If the few data points are available, speed can not be estimated and NA is returned.