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Coastal hazards map viewer

My Council » Projects » Coastal Management – responding to climate change » Coastal hazards map viewer

About the map

We’ve developed a coastal hazards map viewer which illustrates the extent of low lying coastal land in Tasman Bay and Golden Bay that may be affected by a range of sea level elevations. 

The map shows a range of sea level rise scenarios in 0.5m increments up to 2m. It also shows the impacts of higher tides caused by storms, mapped as a present day 1% AEP (annual exceedance probability) joint probability storm-tide event. A 1% AEP event has a 1% chance of occurring in any year.

We have also mapped areas of historical coastal erosion (sediment loss) and accretion (sediment gain) and the presence of coastal protection structures such as stopbanks, walls and rock revetments. 

Methodology

The methodology used to develop the coastal hazards information shown on the map viewer is described in the accompanying report: 

Coastal Hazards Assessment in Tasman Bay/Te Tai o Aorere and Golden Bay/Mohua (2019) (pdf 2 MB) 

Read our FAQs for more information on the mapping and what it may mean for landowners and residents

See tips below on how to get the most out of the map. You can open the map viewer in a new window. 

 

Please note the following section of content is possibly being delivered from an external source (IFRAME in HTML terms), and may present unusual experiences for screen readers.

How to use the map

With our coastal hazards map viewer, you can:

  • Click on the About symbol to read more about the mapped information.
  • Click on the Layer List symbol to view the map legend.
  • Turn map layers on or off by clicking individual boxes in the Layer List. 
  • Click on the Basemap Gallery symbol to view either aerial or street (topographic) basemaps.
  • Click on the Swipe symbol to compare scenarios (left hand side) to the underlying basemap (right hand side). Click and drag the swipe bar (in centre) either left or right across the map. 
  • Find an address or place by typing the location (e.g. 189 Queen Street) into the text box and click on the magnifying glass.
  • Click on the Bookmark symbol to view predefined areas e.g Motueka, Tākaka, etc.

Tip

You can turn layers off and on - either view several layers at the same time, or a single scenario.