Tracking Potential NFIP Violations Using Digital Orthophotos Colleen A. Hermans GIS Analyst Map Modernization Program, Wisconsin Department of Natural Resources Cattle on farm house porch, Cedar River, WI

Overview Map Modernization (MapMod) Role vs. Floodplain Managers Map Modernization (MapMod) Role vs. Floodplain Managers Process of finding potential violations Process of finding potential violations Problems and Benefits Problems and Benefits Examples Examples Moving Forward Moving Forward Devil’s Lake, WI ’08 flood event

MapMod Role vs. Floodplain Managers MapMod’s GIS and Engineer roles – first phase of many steps MapMod’s GIS and Engineer roles – first phase of many steps Using GIS as a tool to create more effective communication between floodplain managers and GIS staff Using GIS as a tool to create more effective communication between floodplain managers and GIS staff Carp moving inland, Janesville, WI

List of potential violations with symbology

Determining the DOPs

Shapefiles Used

Old FIRM

Swipe Tool

Attribute Table Data

Shapefile Name: nfip_violations_wi Feature Class: point

Map It Juneau Co. current effective date Sept 18, Juneau Co. current effective date Sept 18, No DFIRM DOP > oldest DOP vs. newest No DFIRM DOP > oldest DOP vs. newest

Map It Rock Co. effective date Sept 19, 2008 (started 2003) Rock Co. effective date Sept 19, 2008 (started 2003) DFIRM DOP 2005 DFIRM DOP 2005

Map It with old FIRM and Current DFIRM Cranberry bog area Cranberry bog area Drudging and filling in both old and current Zone A areas Drudging and filling in both old and current Zone A areas

Problems DOP year unavailable > too recent or too old (use aerial photo from map library) DOP year unavailable > too recent or too old (use aerial photo from map library) Poor resolution/ too leafy Poor resolution/ too leafy Time intensive now > plan in advance when upcoming Community Assistance Visits (CAVs) will happen Time intensive now > plan in advance when upcoming Community Assistance Visits (CAVs) will happen

Benefits Allows for a review of a wide area Allows for a review of a wide area Limits wasteful drive time during windshield surveys > better for the environment and budgets Limits wasteful drive time during windshield surveys > better for the environment and budgets Access to off-limits areas and other remote locations Access to off-limits areas and other remote locations Clear description of the property very useful when dealing with local officials Clear description of the property very useful when dealing with local officials Reduces time spent by Floodplain Managers Reduces time spent by Floodplain Managers

Application Note: the four potential building violations in both the old FIRM and new DFIRM Note: the four potential building violations in both the old FIRM and new DFIRM

Application Note: the two buildings are potential violations until the new DFIRM maps become effective Note: the two buildings are potential violations until the new DFIRM maps become effective

Index Maps

Next Steps  Expand violation types  Look at LOMRs and LOMAs Training workshops Training workshops Help communities with CACs Help communities with CACs Switch focus from regulation to planning Switch focus from regulation to planning Potential Violations = 509 and counting

Questions? Apostle Island Sea Caves, WI (happy water photo)