![Page 1: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/1.jpg)
Continuous Data from GPS Collars
Analyzing time and location
Yellowstone National Park
Tyler Coleman & Andrea Amparore (presented by Ann Rodman)
It’s 5 am, do you know where your grizzly bears are?
![Page 2: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/2.jpg)
GPS Collar Data
The problem with so much data . . .
. . . is how quickly it gets complicated.
![Page 3: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/3.jpg)
The Study 15 Grizzly bears with GPS collars
location every 30 min 75,000 locations/season
Backpacker groups with GPS units location every 5 min 140 trips/season 76,000 locations/season
74 campsites
A huge amount of data !
![Page 4: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/4.jpg)
2007 GPS Collar data
![Page 5: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/5.jpg)
Study Location
35 miles
Bears: 75 Hikers: 2,600 Four bear management
areas
![Page 6: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/6.jpg)
Management questions
Humans and grizzly bears in the backcountry
How often are the bears and hikers in close proximity?
Which areas have a higher likelihood of human/bear interactions
![Page 7: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/7.jpg)
Hiker trips + Bear movement
![Page 8: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/8.jpg)
Need the time and date when the tracks cross the intersection point
In the 2007 data there are more than 15,000 of these intersection points
10:16:23 6/25/2007
10:00:14 6/25/2007
10:30:18 6/25/2007
10:19:32 6/25/2007
10:21:28 6/25/2007
bears Intersection hikers
![Page 9: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/9.jpg)
Linear Referencing Time - bears
Use GPS points to add time to lines• Need consecutive numbers
Clean up GPS data
Convert from date/time to decimal hours• start midnight 1/1/07
10:00:14 6/25/20074186.00 hrs
10:30:18 6/25/20074186.50 hrs
begin
beginend
10:13:28 6/25/20074186.22 hrs
![Page 10: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/10.jpg)
Linear Referencing Time - people
begin
begin
end
10:16:23 6/25/20074186.27 hrs
10:19:32 6/25/20074186.33 hrs
10:21:28 6/25/20074186.36 hrs
end
10:18:48 6/25/20074186.31 hrs
10:13:28 6/25/20074186.22 hrs
10:18:48 6/25/20074186.31 hrs
5:200.09 hrs
Bear crosses point Hikers cross point Time difference
![Page 11: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/11.jpg)
bears No intersection hikers
How often do bear and hiker routes come close to each other without crossing?
3786.16 hrs
3786.21 hrs3786.22 hrs
3786.28 hrs
![Page 12: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/12.jpg)
Management questionsCampsites: Do bears . . .
• go into occupied campsites?
• enter during the day or during the night?
![Page 13: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/13.jpg)
Bears and campsites
What is the timing?
![Page 14: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/14.jpg)
Buffered campsite
500 m (sight)
100 m (noise)
50 m (core area)
10 m (campsite)
Bear route with time
Campsite buffer
![Page 15: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/15.jpg)
Data clock chartWithin 500 m
Within 50 m
Tracking Analyst display
![Page 16: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/16.jpg)
Data viewBearsBears
CampersCampers
![Page 17: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/17.jpg)
Campsite “timelines”
6000 hours (250 days)
People in camp (linear event along route)
Bear in occupied camp (point event)
Bear in camp (point event)
2000Begin (3/25)
8000
End (11/30) timeline route for a campsite
intersect
![Page 18: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/18.jpg)
![Page 19: Continuous Data from GPS Collars Analyzing time and location](https://reader036.vdocuments.site/reader036/viewer/2022062410/5681549c550346895dc2b174/html5/thumbnails/19.jpg)
Comparing CampsitesBears early
Bears late
Bears all season
Unpopular with bears and people