Drone mapping to assess change

Summary
This is a webinar hosted by Dr Karen Joyce from GeoNadir on using drone imagery to assess environmental changes from Tropical Cyclone Jasper. It covers accessing free high-resolution aerial maps, detecting changes in beach geomorphology, vegetation, infrastructure pre- and post-cyclone, collaborating via interactive map comments, capturing optimal data sets, and prioritizing areas to survey. Key takeaways are the importance of disaster readiness data collection, leveraging community-shared maps, visualizing impacts with before-after image comparisons, and planning efficient mapping flights.

Introducing the Webinar and Presenter
The webinar introduction covers the session agenda, interactive format, speaker background in Cairns Australia region, and ties back to a previous disaster readiness webinar. The goal is assessing cyclone recovery and future damage reduction using aerial imagery.

Visualizing Tropical Cyclone Impacts with Map Comparisons
High-resolution aerial maps of Cairns beaches and infrastructure are shown before and after Tropical Cyclone Jasper made landfall. Interactive image comparison tools clearly indicate changes like beach erosion, creek flooding debris, reshaped coastline, and newly constructed but surviving footbridge.

Leveraging Community Data Sources
The presenter accesses shared maps data contributed by others in the Cairns area to view flooding impacts along the Barron River. Comparisons show extensive vegetation loss and a destroyed rail bridge.

Collaborating to Prioritize Mapping Areas
An interactive demo shows how users can add geotagged comments on specific map locations to highlight damage areas, assign priority levels, and recommend additional mapping needs. This facilitates information sharing and coordination without emailing files.

Capturing Optimal Drone Data Sets
Tips are provided on efficient drone mapping flights to get high quality data sets, including direction considerations for water bodies, use of RTK and PPK precision, and importance of ground control points. Sample maps illustrate artifacts from suboptimal approaches.

Link for the project shown in the webinar - https://data.geonadir.com/myprojects/...

Data readiness webinar-    • Drone Mapping For Disaster Readiness  

Data readiness for disaster management blog-
https://geonadir.com/data-readiness-f...

Article discussing pros and cons about different georeferencing methods of drone mapping -
https://geonadir.com/four-ways-georef...