Elk Home Range - Davison - 2017-2021 [ds2983]
type: Dataset
description: The project lead for the collection of this data was Carrington Hilson. Elk (3 adult females) were captured and equipped with GPS collars (Lotek Iridium) transmitting data from 2017-2021. The Davison herd does not migrate between traditional summer and winter seasonal ranges. Therefore, annual home ranges were modeled using year-round data to demarcate high use areas in lieu of modeling the specific winter ranges commonly seen in other ungulate analyses in California. GPS locations were fixed between 1-6 hour intervals in the dataset. To improve the quality of the data set as per Bjørneraas et al. (2010), the GPS data were filtered prior to analysis to remove locations which were: i) further from either the previous point or subsequent point than an individual pronghorn is able to travel in the elapsed time, ii) forming spikes in the movement trajectory based on outgoing and incoming speeds and turning angles sharper than a predefined threshold , or iii) fixed in 2D space and visually assessed as a bad fix by the analyst. The methodology used for this migration analysis allowed for the mapping of the herd''s home range. Brownian bridge movement models (BBMMs; Sawyer et al. 2009) were constructed with GPS collar data from 3 elk, including 9 annual home range sequences, location, date, time, and average location error as inputs in Migration Mapper. BBMMs were produced at a spatial resolution of 50 m using a sequential fix interval of less than 27 hours. Large water bodies were clipped from the final output. Home range is visualized as the 50th percentile contour (high use) and the 99th percentile contour of the year-round utilization distribution. Home range designations for this herd may expand with a larger sample.
issued: 2022-03-16T21:39:09+00:00
modified: 2022-03-16T21:39:18.922000+00:00
contact point: Organization
  fn: BIOS_Admin
keyword: amerigeo
keyword: amerigeoss
keyword: authcdfw
keyword: brownian-bridge-movement-model
keyword: california
keyword: california-department-of-fish-and-wildlife
keyword: california-natural-resources-agency
keyword: caopendata
keyword: cdfw
keyword: cervus-canadensis
keyword: ckan
keyword: connectivity
keyword: del-norte
keyword: ds298320220303wm
keyword: elk
keyword: geo
keyword: geoss
keyword: gps
keyword: home-range
keyword: humboldt
keyword: migration-mapper
keyword: national
keyword: north-america
keyword: north-coast
keyword: telemetry
keyword: united-states
theme: {"Natural Resources"
theme: Water}

ArcGIS Hub Dataset
type: Distribution
format: HTML
issued: 2022-04-28T02:02:22.077693
modified: 2025-11-21T01:31:21.708752
access URL: https://gis.data.cnra.ca.gov/maps/CDFW::elk-home-range-davison-2017-2021-ds2983

ArcGIS GeoService
type: Distribution
format: ArcGIS GeoServices REST API
issued: 2022-04-28T02:02:22.077704
modified: 2025-11-21T01:31:21.709161
access URL: https://services2.arcgis.com/Uq9r85Potqm3MfRV/arcgis/rest/services/biosds2983_fpu/FeatureServer/0
media type: application/octet-stream

KML
type: Distribution
format: KML
issued: 2022-04-28T02:02:22.077719
modified: 2025-11-21T01:31:21.710296
access URL: https://gis.data.cnra.ca.gov/datasets/CDFW::elk-home-range-davison-2017-2021-ds2983.kml
media type: application/vnd.google-earth.kml+xml

Shapefile
type: Distribution
format: ZIP
issued: 2022-04-28T02:02:22.077724
modified: 2025-11-21T01:31:21.710703
access URL: https://gis.data.cnra.ca.gov/datasets/CDFW::elk-home-range-davison-2017-2021-ds2983.zip
media type: application/zip

GeoJSON
type: Distribution
format: GeoJSON
issued: 2022-04-28T02:02:22.077709
modified: 2025-11-21T01:31:21.709545
access URL: https://gis.data.cnra.ca.gov/datasets/CDFW::elk-home-range-davison-2017-2021-ds2983.geojson
media type: application/geo+json

CSV
type: Distribution
format: CSV
issued: 2022-04-28T02:02:22.077714
modified: 2025-11-21T01:31:21.709921
access URL: https://gis.data.cnra.ca.gov/datasets/CDFW::elk-home-range-davison-2017-2021-ds2983.csv
media type: text/csv

US Migrating
type: Agent