Layer Explorer
Toggle GIS layers to explore how spatial data combines to inform engineering decisions
Map Layers
Sea Level Rise Scenario
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Case Study: New Brighton sits on a low-lying coastal strip east of Christchurch.
This area faces real risks from sea level rise and coastal flooding.
The data layers you see here are from LINZ and represent real infrastructure.
Guided Questions
Q1
Turn on all layers one at a time. What type of geometry does each layer use — point, line, or polygon?
Q2
Turn on the sea level slider to 2m. Which layers would you need to determine how many buildings are at risk of flooding?
Q3
Set sea level to 1m, then 3m. Describe how the flood extent changes. Is the relationship between sea level and flooded area linear?
Q4
A council engineer needs to plan evacuation routes for a coastal flood event. Name three layers from this map they would need, and explain why each matters.
Q5
What is missing from this map that would be important for a full flood risk assessment? Name at least two additional data layers you would want.