drones and open data to understand development and conservation challenges · 2017-11-06 · drones...
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Drones and Open Data to Understand Development and Conservation Challenges
Nicholas Altizer 1, 2, Dr. Timothy Hawthorne 1, 2, Christine Munisteri 2, Lain Graham 1, 2
1 University of Central Florida2 Citizen Science GIS
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Public Satellite Imagery• Outdated
• Nearly 20 years old in some cases
• Poor resolution• Difficult to identify features
• Cloud interference• Obstructs surface features
• Segmented• Areas sometimes split among 2 or
more time periods
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Drones in Research• Low-cost alternative to satellite
and aerial photography• Commercial from $500 for under
10cm resolution
• Commercially available• Easy to acquire, limited restrictions
• Ownership of collected imagery• No waiting, fly when needed
• Pending weather
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Open ReefOur Goal:• Use drones to map every island
in the Belize Barrier Reef and provide that updated imagery to the public for free to encourage community research and citizen science
• Use commercially available technology
• Create a model that can be replicated in other areas
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Our Process• Imagery collected using DJI Phantom 4
and 4 Pro quadcopters• 150 islands flown so far over 22
fieldwork days• Areas from 13 acres to 1103 acres• Roughly 400-500 islands in Belize
• Orthomosaics created using Esri’sDrone2Map
• Resolution from 3.21cm to 7.49cm• All data freely available to public to
encourage citizen science initiatives• Work with communities and local
partners to utilize local knowledge
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Development Mangroves Reef Systems Erosion
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Spanish Cayes• Satellite Imagery:
• 01/1999 at 15m• Impossible to discern features
• Drone Imagery:• 10/2016 at 6.38cm• Inhabited• Populations vulnerable due to
quality difference
• Drone imagery beneficial for establishing baseline data
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Conch Island• Satellite Imagery:
• 12/2010 at 50cm• Difficult to discern features• Island boundary unclear
• Drone Imagery:• 10/2016 at 6.23cm• Local knowledge in absence of
poor satellite imagery• Spatial storytelling provides change
over time
• Drone imagery beneficial for building on potential baseline data
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Blueground Range• Satellite Imagery:
• 12/2009 at 50cm• Uninhabited• 96% mangrove cover
• Drone Imagery:• 07/2017 at 4.30cm• Inhabited• Populations vulnerable due to
temporal difference• Mangrove cover reduced to 66%
• Updated drone imagery beneficial for monitoring island habitation changes over time
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Grassy Caye Range Zone 5• Within Turneffe Atoll
• High-importance conservation area• Satellite Imagery:
• 08/2005 at 60cm• 1.29ha island size• 63% mangrove cover
• Drone Imagery:• 03/2017 at 6.87cm• 1.66ha island size• 89% mangrove cover
• Updated drone imagery beneficial for mapping conservation efforts over time
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Community Impacts• No formal census on island
populations in Belize• Sharing and supporting local
knowledge from community members
• Understanding environmental impacts, land use, and human adaptation
• Bridging gap between scientists and public
• Fostering positive education outcomes
• Use local knowledge through storytelling in place of poor satellite imagery
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Conclusions• Well-grounded, replicable
methodology for replacing satellite imagery with drone imagery
• Useful for similar mapping projects
• Drones are cost-effective, easy to use, and able to be used when imagery is needed
• Free of satellite imagery issues
• Belize Barrier Reef islands are changing and need protection provided by public drone imagery
• Providing imagery encourages community participation and education
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Thank you to our partners and contributors!
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Share using #citizensciencegisand #openreef
http://citizensciencegis.org
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Dr. Timothy HawthorneAssistant Professor of GISUCF Dept. of Sociology and College of Sciences GIS Cluster