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Low level oblique 1976 and 2007 aerial photos covering the Lake Michigan and Lake Superior shorelines in Wisconsin were used for qualitative mapping of conditions along the shoreline in a GIS database to support comparative analysis between the two time periods. Three components of the shoreline were captured for each time period: (1) beach/nearshore zone; (2) backshore zone; and (3) structure type (points), for non-linear or perpendicular structures (e.g. groins, jetties). This presentation will highlight some of the changes that did take place on the shoreline between 1976 and 2007. We will also present the processes and issues associated with capturing shoreline features using oblique photos within a GIS environment as well as issues related to storing, viewing and distributing these datasets. Finally, we will describe the applications and tools that are being developed to make the datasets and related information available to the public through a web-based mapping portal and its planned integration into the Wisconsin Coastal Atlas.
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Jeff StoneProject ManagerAssociation of State Floodplain Managers
David M. MickelsonPrincipal InvestigatorGeo-Professional Consultants, LLC
Identifying and Representing Wisconsin’s Great Lakes Shoreline
WLIA ConferenceFebruary 17, 2011
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ASFPM Mission
Mitigate the losses, costs, and human suffering caused by flooding.
Protect the natural and beneficial functions of floodplains.
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Identifying and Representing Wisconsin’s Great Lakes Shoreline
Overview 1976 oblique photos
Comprehensive shore/bluff erosion project* 2007/08 color oblique images Qualitative classification
Changes between time periods Public Access to photos/data
*Mickelson, D.M., Acomb, L., Brouwer, N., Edil, T.B., Fricke, C., Haas, B., Hadley, D., Hess, C., Klauk, R., Lasca, N. and Schneider, A.F., 1977, Shoreline erosion and bluff stability along Lake Michigan and Lake Superior shorelines of Wisconsin: Shore Erosion Technical Study Technical Report, Coastal Management Program, State Planning Office, 199 p. plus appendices.
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Identifying and Representing Wisconsin’s Great Lakes Shoreline
1976
2008
Door County
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Identifying and Representing Wisconsin’s Great Lakes Shoreline
Project Tasks Geo-Locate 1976 oblique photos Capture 2007 oblique photos Photo Interpretation / Shoreline Classification Analysis, Results and Reporting Web Maps, Oblique Viewer & Public Access
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Scan photosManually geo-locateVirtual Earth/Bing Maps
Geo-locating 1976 oblique photos
Photo CountL. Michigan ~ 1,517L. Superior ~ 1,094*Green Bay n/a
* Not complete
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Digital Cameras NIKON E8800 Panasonic DMC-FZ30
Garmin GPSGPS-Photo Link
Capturing 2007 oblique photos
Photo CountL. Michigan ~ 1,463L. Superior ~ 2,755Green Bay ~ 3,648
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GDB Feature Classes (3)Beach description (linear)
Armored / Unarmored Protection class Beach class
Backshore (linear) Type – no bluff / low bank or bluff Vegetation Condition – stable to failing
Structure (point) Groin, jetty, or offshore breakwater Small Boat dock
Photo Interpretation & Shoreline Classification
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Issues & Limitations Single Date Shoreline
WDNR 24k Hydro
Qualitative Classification Photo Interpretation Confidence levels
Data Storage & Organization 10,000 + photos Manual geo-location process – human error
Photo Interpretation & Shoreline Classification
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Photo Interpretation & Shoreline Classification
1976
Port Washington
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Photo Interpretation & Shoreline Classification
2007
Port Washington
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Shoreline Analysis & ResultsShore Structures Beach Classification
Bluff Classification
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OpenGeo Community SuitePremier open source spatial relational database—fast, robust, full-featured
Web Mapping & Oblique Viewer
Map and feature server providing standardized web access to GIS data sources and cartographic quality maps
Web map accelerator, intelligently caching and serving tiles to make maps scale
Industry-standard Javascript map controls for viewing and editing data from multiple sources
Rich user interface controls for the geospatial web.
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Applications Public Outreach & Education Tourism Hazard Management (storms, erosion)
Identify area of concern – e.g. unstable bluff Compare photos over time Create maps w/ supporting photos
Waterfront Planning Watershed Management
Web Mapping & Oblique Viewer
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1. Web Map & Oblique Viewer
2. Image/Feature Catalog Bulk downloads By Geography GeoNetwork
Public Access to Photos and Data
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1. Web Map & Oblique Viewerw/ basic data accessMarch – April 2011
2. Image/Feature CatalogNovember – December 2011
Coming Soon!
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Oblique Viewer Custom selection of photo points Additional navigation tools
Historic Shorelines Erosion rates
Additional Oblique Imagery Great Lakes Flood Hazard Mapping – FEMA/USACE City / County photos User-added photos
Wisconsin Coastal Atlas
Future Directions
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Jason Hochschild, SK1 Consulting, LLCWeb Map & Oblique Viewer
Lisa Colville, UW Madison Geology Dept.Project Analyst
David Hart, UW Sea Grant InstituteProject Support
Acknowledgments
Funding provided by:
