Hawaii Shoreline Change Tool
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Parcel DetailshelpIcon
Parcel TMK previousArrow nextArrow
Transect ID previousArrow nextArrow
Shoreline Change (ft/yr)
Erosion Hazard

Calculate SetbackhelpIcon
Multiplier (years)
Buffer (ft)
Calculated Value

The cells below show all parcel/transect combinations for the parcels or transects currently selected.helpIcon
Hawaii Shoreline Change Tool
Select a location:
OAHUWest Maui
Hawaii Kai 
Kaneohe BayPoipu
North ShoreKapaa
Base layers   Inundation
Parcels   0ft  
Transects   1ft  
Shorelines 3ft  
1910-1919   4ft  
1920-1929   5ft  
1930-1939   6ft  
1940-1949   Ground  
1960-1969   Confidence
1970-1979   >80%  
1980-1989   <80%  
2000-2009   Gov't Owned
Flood Hazard State  
Zones starting DHHL  
with A or V Federal  
Hawaii Shoreline Change Tool

This tool allows you to find the rate at which the shoreline is changing at a given location and to view historical shoreline positions and potential impacts from sea level rise.

To find the rate at which the shoreline is changing at a given location simply search by Address, TMK or Transect ID (or select a location and select a parcel), and the results will be shown in the table.

Use of this tool assumes acknowledgement of the Disclaimer.

Historical shoreline change data (1) and sea level rise (SLR) scenarios (and confidence) from the NOAA Sea Level Rise Viewer (2) are available in the map for viewing purposes. Six SLR scenarios (1 - 6 ft) are mapped from the mean higher high water surface around Kauai, Oahu, Maui, Molokai, Lanai and Hawaii.

(1) Hawaii Coastal Geology Group
(2) NOAA Sea Level Rise Viewer, NOAA OCM Digital Coast

This tool allows you to find the rate at which the shoreline is changing at a given location and to view historical shoreline positions and potential impacts from sea level rise.
Use of this tool assumes acknowledgement of the Disclaimer.


In preparation of these maps and their underlying information, every effort has been made to offer the most current, correct, and clearly expressed information possible. Nevertheless, inadvertent errors in information may occur.

Therefore PacIOOS and HCGG make no representation or warranty of any kind, and in particular, this product, its accuracy, labeling, dimensions, property boundaries, or placement or location of any map features thereon. PacIOOS and HCGG DISCLAIM ANY WARRANTY OF MERCHANTABILITY OR WARRANTY FOR FITNESS OF USE FOR A PARTICULAR PURPOSE, EXPRESS OR IMPLIED, WITH RESPECT TO THIS DIGITAL PRODUCT. Any user of this digital product accepts no warranties and expressly waives any implied warranties as to fitness, merchantability, design, construction, condition, specifications or performance.

PacIOOS and HCGG disclaim, and shall not be held liable for, any and all damages, loss or liability, whether direct, indirect, or consequential, that arises or may arise from this product or the use thereof by any person or entity.

The user of this digital product hereby agrees to, and shall, indemnify, hold harmless, and defend PacIOOS and HCGG against any and all claims, causes of action, losses, damages, attorney fees, expenses (including any attorney fees incurred by PacIOOS and HCGG) that may be sustained or asserted against PacIOOS and/or HCGG arising from, or in any way connected to, its use by the user, and any of the users, officers, employees, agents, assigns, and successors.

Any information should be verified with the appropriate organizations.


Parcel TMK reflects the currently selected parcel TMK.

DFIRM reflects the FEMA Flood Hazard Zones within the parcel.

Transect ID reflects the currently selected transect identifier.

Shoreline Change is the shoreline change rate at the location where the selected Transect intersects the shoreline. (Negative values reflect erosion. Positive values reflect accretion).

Erosion Hazard is identified when the transect has a negative Shoreline Change Rate.

Inundation areas represent areas of potential inundation from ocean and groundwater sources. Blue areas are connected hydrologically to the ocean and are graduated according to depth. Green areas are low lying areas that are not hydrologically connected to the ocean.

Confidence is associated with accuracy and resolution of elevation data. 80% confidence identifies locations that are likely to be flooded 8 out of 10 times by a SLR scenario. Areas shaded blue represent high confidence (>80%); orange represents low confidence (<80%).


The calculation tool is provided to calculate a setback value.

The formula used is:
Shoreline Change Rate X Number of Years - Buffer Value

Please refer to specific county development guidelines to use the appropriate rate multiplier and/or buffer distance.