Coastal Community Development Program
Resources - Tools > Coastal Resilience Index

Inundation Mapping Tools

These tools and tutorials were developed to be used with an associated Coastal Resilience Index, but can also be used as standalone products. These map tools overlay inundation at different lake levels to bring awareness to infrastructure and services that may be at risk.  Inundation layers were created using a bathtub method and are based on the elevation of static water using the highest quality elevation data available for each county.  Currently wave run up data are not readily available. As a result, the generated maps assume only flat water associated with lake levels, not stormwater drainage issues.


• Mapping tools and tutorials available in two different formats: Web mapping application for anyone with an internet connection. Map package for advanced GIS users.

• View parcels and infrastructure at high resolution

• Create maps. Export in PDF format.
Lake Ontario Tools:
Lake Ontario Web Mapping Application (Non-ArcGIS users click here)
For instructions, see Lake Ontario Mapping Application Tutorial (pdf)

Lake Ontario Map Package (ArcGIS users click here) ArcMap Desktop version 10.0 or higher is required
For instructions see the Lake Ontario Map Package Tutorial (pdf)

Disclaimer: The data and maps in these tools illustrate the scale of potential flooding or land exposure at a given water level, not the exact location. They do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during calm conditions (excludes wind-driven changes in water levels). The data, maps, and information provided should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The data and maps in these tools are provided “as is,” without warranty to their performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of these data is assumed by the user. These tools should be used strictly as a planning reference tool and not for navigation, permitting, or other legal purposes.

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