Start a Movement Toolbox

[bbest]

This is a placeholder for development of a movement toolbox, which deserves more thought. Ideally, we could:

Functionality

• Import from data:
  • csv
  • csv with Argos' 2 sets of locations
  • Argos DIAG format
  • into a special feature class?

• Filter from points of data, based on:
  • location class
  • speed, distance and angle (Frietas, 2008)
  • land
  • ...?

• Generate Track, ie line feature class, possibly with:
  • straight lines
  • berzier's spline (Tremblay, 2006)
  • ...?

• Interpolate points along track, using:
  • probable location, using Bayesian state-space model (Jonsen,
  • ...?

• Analyse
  • kernel density
    •  LoCoH - Local Convex Hull Homerange Generator with web, R and ArcGIS interfaces availble ( Getz et al, 2007).
    • Other refs:
      •  Network-Based Kernel Density Estimation for Home Range Analysis
      •  Utilization Distribution Estimation Using Weighted Kernel Density Estimators
      •  Comparison of Programs for Fixed Kernel Home Range Analysis
  •  Aarts, G, M MacKenzie, B McConnell, M Fedak, et al. 2008. Estimating space-use and habitat preference from wildlife telemetry data. Ecography.
  • habitat...
  • ...?

R Libraries and Scripts

I (Ben Best) wrote some R scripts written for projects Nemo (Catherine McClellan?) and Tortugas (Dana Wingfield).

• R packages
  •  argosfilter - speed, distance, angle filters after Freitas2008.pdf
  •  trip - reading Argos data (even in original emailed DIAG format) into [sp]atial objects, calculating distances, etc
  •  adehabitat - habitat analysis of movement data
  • ...?

• R scripts
  • filter_argos_all.R - program to filter locations using speed, distance, angle filters from argosfilter package (Nemo)
  • filter_land.R - filters out points on land (Nemo)
  • sim_crw_v2.r - simulates a correlated random walk, sampling a given track's set of turn angles and distances, redoing if on land. can be used as the null model for pseudo-absence data in development of a predictive model
  • ...?

Issues

• generation of pseudo-absence points for comparison
• incorporation of surface current movement
• ...?

Related Work

• ArcGIS tools
  •  ArcView Animal Movement
  •  Hawth's Tools
  • [ARGOS-Tools  http://gis-lab.info/programs/argos]
  • ...?

• Web services
  •  Satellite Tracking Analysis Tool (STAT)
  • ...?

• Matlab?

[bbest]

program to filter locations using speed, distance, angle filters from argosfilter package (Nemo)

[bbest]

filters out points on land (Nemo)

[bbest]

simulates a correlated random walk, sampling a given track's set of turn angles and distances, redoing if on land

[jjr8]

Great ideas! Thanks for the detail!

Setting the milestone to "Unscheduled", which we use for work that has not been assigned to a milestone yet. (Note: feel free to continue to open tickets without setting the Milestone field. This will ensure I see them. I will then set them to an appropriate milestone, based on what I know of our current priorities.)