1 / 22

Counting Animals from Space:

Counting Animals from Space:. Chapter Two Transitions from Captivity to Wild Places. Scott Bergen & Eric Sanderson. Why Count Wildlife?. Fundamental to Conservation Foundational to Population Studies Federal Programs Spend Millions of Dollars Annual to Count Animals. Nov. 10, 2004.

Pat_Xavi
Télécharger la présentation

Counting Animals from Space:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Counting Animals from Space: Chapter Two Transitions from Captivity to Wild Places Scott Bergen & Eric Sanderson

  2. Why Count Wildlife? • Fundamental to Conservation • Foundational to Population Studies • Federal Programs Spend Millions of Dollars Annual to Count Animals

  3. Nov. 10, 2004 10:52:45 am 35 people involved 21 keepers 15 Volunteers 28 Enclosures mapped for individual animal locations 300 Faux fur targets placed in 4 ‘habitats’ Digital Globe Inc ©

  4. Ground –vs- Sky Digital Globe Inc ©

  5. Information Shadow Digital Globe Inc ©

  6. Tallying Identification by Species Logit (identified targets) = -3.666 + 0.019(Color) + 0.970(Size) - 0.230(VegHt) - 0.421(Shade).

  7. National Elk Refuge. Jackson , WY

  8. Counting Animals • Most reliable estimate use transect with repeat measures • Population estimates w/ standard deviation • Findings usually extrapolated from small area to available habitat or other limiting feature • Costly to count animals on ground • Remote sensing rarely used (aerial imagery) • Time and scale rarely match satellite scale & time • Mismatch in terms of time and location in reference to identifying- verifying high spatial resolution satellite imagery

  9. Why the National Elk Refuge? • Reliable elk & bison congregations during winter • Logistic regression equation shows good fit for size, color, vegetation and shadow • Annual census of both elk and bison

  10. Animal Count Comparisons • Refuge level, elk (weekly), bison (annual) • Ground census estimate @ time of satellite acquisition • Panoramic photo estimate @ time of satellite acquisition • Heads up digitizing estimate • Object oriented estimate

  11. Jackson Wyoming • Access limited • Freakin’ cold -20f • Snow bleaching histogram of sensor Digital Globe Inc ©

  12. Ground Census of Elk Group • High Ground limited • Limited by distance • 1360 individuals • 60/40 female- male ratio

  13. Thick In Elk Digital Globe Inc ©

  14. Panaramic Resesults • Verified over 1,000 elk sex, position, direction position in less than 10 seconds • Estimated 1070 individuals • 679 females, 299 males, 89 ? • Knew there were more but individuals > 1km were not identifiable as well as those totally blocked by other elk

  15. Heads up • 1503 individuals Digital Globe Inc ©

  16. Object Oriented Approach • Scale based segmentation • > classification • > revision • >classification • Hierarchical strutured • Means both smaller and larger Digital Globe Inc ©

  17. Segmentation • Adds new dimensions to data • Area, spectra, variability within polygons • Adjacency • Contextual • Generates data Important to distinguish animals and differentiate types of animals

  18. Initial Classification • Good Results • Identified 1540 individuals • Misidentification within riparian areas • Grouped elk in close proximity

  19. Classification • Refined with an area classifier • 1482 individuals • Further refinement, standing – sitting, elk vs bison, sexes in bison

  20. Further refinement

  21. Summary of Animal Counts • Park Estimate: 4,900 elk, 951 bison • Ground Estimate: 1,360 elk, 60/40 f/m • Panoramic: 1,071 elk, 69/31 f/m • Heads up: 1,503 elk • 1st Object Oriented Class: 1,540 • Ob. Orient w/ Area: 1,480

  22. Future Considerations

More Related