tracking potential nfip violations using digital orthophotos colleen a. hermans gis analyst map...
TRANSCRIPT
![Page 1: Tracking Potential NFIP Violations Using Digital Orthophotos Colleen A. Hermans GIS Analyst Map Modernization Program, Wisconsin Department of Natural](https://reader033.vdocuments.mx/reader033/viewer/2022051820/56649edc5503460f94bec190/html5/thumbnails/1.jpg)
Tracking Potential NFIP Tracking Potential NFIP ViolationsViolations Using Digital Using Digital
OrthophotosOrthophotos
Colleen A. HermansColleen A. HermansGIS AnalystGIS Analyst
Map Modernization Program, Map Modernization Program, Wisconsin Department of Natural Wisconsin Department of Natural
ResourcesResourcesCattle on farm house Cattle on farm house
porch, Cedar River, WIporch, Cedar River, WI
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OverviewOverview Map Modernization (MapMod) Role Map Modernization (MapMod) Role
vs. Floodplain Managersvs. Floodplain Managers Process of finding potential violationsProcess of finding potential violations Problems and BenefitsProblems and Benefits ExamplesExamples Moving ForwardMoving Forward
Devil’s Lake, WI ’08 flood Devil’s Lake, WI ’08 flood eventevent
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MapMod Role vs. Floodplain MapMod Role vs. Floodplain ManagersManagers
MapMod’s GIS and Engineer roles – MapMod’s GIS and Engineer roles – first phase of many stepsfirst phase of many steps
Using GIS as a tool to create more Using GIS as a tool to create more effective communication between effective communication between floodplain managers and GIS stafffloodplain managers and GIS staff
Carp moving inland, Janesville, Carp moving inland, Janesville, WIWI
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List of potential violations with List of potential violations with symbologysymbology
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Determining the DOPsDetermining the DOPs
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Shapefiles UsedShapefiles Used
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Old FIRMOld FIRM
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Swipe ToolSwipe Tool
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Attribute Table DataAttribute Table Data
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Shapefile Name: nfip_violations_wiFeature Class: point
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Map ItMap It Juneau Co. Juneau Co.
current current effective date effective date Sept 18, Sept 18, 1991.1991.
No DFIRM No DFIRM DOP > oldest DOP > oldest DOP vs. DOP vs. newestnewest
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Map ItMap It
Rock Co. Rock Co. effective effective date Sept date Sept 19, 2008 19, 2008 (started (started 2003)2003)
DFIRM DOP DFIRM DOP 20052005
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Map It with Map It with old FIRM and old FIRM and
Current Current DFIRMDFIRM
Cranberry Cranberry bog areabog area
Drudging Drudging and filling in and filling in both old and both old and current Zone current Zone A areasA areas
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ProblemsProblems
DOP year unavailable > too recent or DOP year unavailable > too recent or too old (use aerial photo from map too old (use aerial photo from map library)library)
Poor resolution/ too leafyPoor resolution/ too leafy Time intensive now > plan in Time intensive now > plan in
advance when upcoming Community advance when upcoming Community Assistance Visits (CAVs) will happenAssistance Visits (CAVs) will happen
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BenefitsBenefits
Allows for a review of a wide areaAllows for a review of a wide area Limits wasteful drive time during Limits wasteful drive time during
windshield surveys > better for the windshield surveys > better for the environment and budgetsenvironment and budgets
Access to off-limits areas and other remote Access to off-limits areas and other remote locationslocations
Clear description of the property very Clear description of the property very useful when dealing with local officialsuseful when dealing with local officials
Reduces time spent by Floodplain Reduces time spent by Floodplain ManagersManagers
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ApplicatioApplicationn
Note: the four Note: the four potential potential building building violations in violations in both the old both the old FIRM and new FIRM and new DFIRMDFIRM
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ApplicatioApplicationn
Note: the Note: the two two buildings are buildings are potential potential violations violations until the new until the new DFIRM maps DFIRM maps become become effectiveeffective
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Index Index MapsMaps
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Next StepsNext Steps Expand Expand
violation typesviolation types Look at LOMRs Look at LOMRs
and LOMAsand LOMAs Training Training
workshopsworkshops Help Help
communities communities with CACswith CACs
Switch focus Switch focus from regulation from regulation to planningto planning
Potential Violations = 509 and counting
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Questions?Questions?
Apostle Island Sea Caves, Apostle Island Sea Caves, WIWI
(happy water photo)(happy water photo)