This map shows SR 37 under different Sea Level Rise conditions and timeframes. It shows the level of water inundation and how certain parts of the highway will be submerged. Click on the map menu below to select overlay layers. More tips below the map.
Map Tips
- Click on the plus (+) or minus (-) buttons—or use the mousewheel—to zoom in and zoom out of the map.
- Click on the icon below the plus (+) and minus (-) buttons to use the map in full screen mode.
- Change the map's base layer by moving your mouse over the square map icon in the lower left of the map. Choose one of the eight possible base layers by clicking on one of the squares when they are revealed.
- Move your mouse over the "layers" icon in the upper right of the map to see a list of the additional or overlay layers you can add. Click on a section heading to reveal the possible layers you can choose
- The black rectangle (shown by default) represents the study area of this project.
Note: This mapping interface provides the data produced during Phase II of the SR 37 Stewardship project. The data are not available for download directly from the website, due to the size of the spatial datasets (up to 2 GB).
Additional Information about the Maps
Overlay Layers
1. LIDAR
LIDAR DEM - The LIDAR data were obtained from the National Oceanic and Atmospheric Administration, which manage the North Bay data for the California Shoreline Mapping Project. The raw data were collected in Feb/Mar 2010 and for marsh areas are accurate to +/- 7 cm.
2. Potential Flooding Storm
Potential Flooding 100 year Storm Base -- This layer represents the potential flooding which might occur during a 100 year coastal storm event.
Potential Flooding 100 year Storm 12" -- This layer represents the potential flooding which might occur during a 100 year coastal storm event with an additional effect of 12 inches of sea level rise.
Potential Flooding 100 year Storm 36" -- This layer represents the potential flooding which might occur during a 100 year storm coastal event with an additional effect of 36 inches of sea level rise.
3. Potential Inundation MHHW
Potential Inundation Mean Higher High Water Base -- This layer represents the potential inundation which might occur during mean higher high water and no additional effect of sea level rise.
Potential Inundation Mean Higher High Water 12" -- This layer represents the potential inundation which might occur during mean higher high water and 12 inches of additional sea level rise.
Potential Inundation Mean Higher High Water 24" -- This layer represents the potential inundation which might occur during mean higher high water and 24 inches of additional sea level rise.
Potential Inundation Mean Higher High Water 36" -- This layer represents the potential inundation which might occur during mean higher high water and 36 inches of additional sea level rise.
Potential Inundation Mean Higher High Water 66" -- This layer represents the potential inundation which might occur during mean higher high water and 66 inches of additional sea level rise.
4. Lowlying Areas Storm
100yr Storm Base – This layer represents low lying areas below the 100 year coastal storm water level that are hydraulically disconnected from the bay.
100yr Storm 12" – This layer represents low lying areas below the 100 year coastal storm water level with 12 inches of sea level rise that are hydraulically disconnected from the bay.
100yr Storm 36" – This layer represents low lying areas below the 100 year coastal storm water level with 36 inches of sea level rise that are hydraulically disconnected from the bay.
5. Lowlying Areas MHHW
Mean Higher High Water Base – This layer represents low lying areas below the mean higher high water level that are hydraulically disconnected from the bay.
Mean Higher High Water 12" – This layer represents low lying areas below the mean higher high water level with 12 inches of sea level rise that are hydraulically disconnected from the bay.
Mean Higher High Water 24" – This layer represents low lying areas below the mean higher high water level with 24 inches of sea level rise that are hydraulically disconnected from the bay.
Mean Higher High Water 36" – This layer represents low lying areas below the mean higher high water level with 36 inches of sea level rise that are hydraulically disconnected from the bay.
Mean Higher High Water 66" – This layer represents low lying areas below the mean higher high water level with 66 inches of sea level rise that are hydraulically disconnected from the bay.
6. Overtopping Storm Highway
100yr Storm Base – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event.
100yr Storm 12" – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event with 12 inches of sea level rise.
100yr Storm 36" – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event with 36 inches of sea level rise.
7. Overtopping MHHW Highway
Mean Higher High Water Base – This layer represents the depth and extent of inundation (overtopping) along the edge of the highway that might occur during mean higher high water.
Mean Higher High Water 12" – This layer represents the depth and extent of inundation (overtopping) along the edge of the highway that might occur during mean higher high water with 12 inches of sea level rise.
Mean Higher High Water 24" – This layer represents the depth and extent of inundation (overtopping) along the edge of the highway that might occur during mean higher high water with 24 inches of sea level rise.
Mean Higher High Water 36" – This layer represents the depth and extent of inundation (overtopping) along the edge of the highway that might occur during mean higher high water with 36 inches of sea level rise.
Mean Higher High Water 66" – This layer represents the depth and extent of inundation (overtopping) along the edge of the highway that might occur during mean higher high water with 66 inches of sea level rise.
8. Overtopping Storm Shoreline
100yr Storm Base – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event.
100yr Storm 12" – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event with 12 inches of sea level rise.
100yr Storm 36" – This layer represents the depth and extent of flooding (overtopping) along the edge of the highway that might occur during the 100-yr coastal storm event with 36 inches of sea level rise.
9. Overtopping MHHW Shoreline
Mean Higher High Water Base – This layer represents the depth and extent of inundation (overtopping) along the shoreline that might occur during mean higher high water.
Mean Higher High Water 12" – This layer represents the depth and extent of inundation (overtopping) along the shoreline that might occur during mean higher high water with 12 inches of sea level rise.
Mean Higher High Water 24" – This layer represents the depth and extent of inundation (overtopping) along the shoreline that might occur during mean higher high water with 24 inches of sea level rise.
Mean Higher High Water 36" – This layer represents the depth and extent of inundation (overtopping) along the shoreline that might occur during mean higher high water with 36 inches of sea level rise.
Mean Higher High Water 66" – This layer represents the depth and extent of inundation (overtopping) along the shoreline that might occur during mean higher high water with 66 inches of sea level rise.
10. Other Layers
Berms / Highpoints -- Berm extraction is done by first reclassifying the edges layer (generated using the lowland mask).
The basic process was to run a focal mean on the DEM to calculate the mean elevation around each cell. After some exploration of different options, it was found that a 100 foot radius created a useful circular neighborhood for this process.
The focal mean was then subtracted from the DEM to give a measure of how high above the mean elevation each point is. For convenience, it was called the edges raster.
In short: edges = DEM – FocalMean(DEM, circle(100feet)).
County Boundaries -- This layers shows the county administrative boundaries for the region.
Study Area -- The black rectangle (shown by default) represents the study area of this project.
Base Layers
Legend Descriptions
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LIDAR DEM This legends shows the representation of values in the LIDAR DEM (Digital Elevation Model), in this case the units are feet. While only a single number is shown right of the color representation, the color value represents the range of values between the value next to the color and the value above it. |
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Potential Flooding and Potential Inundation Layers Like the LIDAR legend, only a single value is shown right of the color representation. The color value represents the range of values between the number shown to the right of the color and value above it. |
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Overtopping Layers This legend represents the feet of overtopping predicted on the Overtopping layers. |