Exposure data

Exposure data provides details of the assets (e.g. buildings) for which the impacts will be calculated. As a minimum, the exposure data needs to include geographic location data (latitude and longitude), a unique identifier for each asset, and an attribute that indicates which vulnerability function to use for that asset.

Additional attributes can enable a more detailed analysis - for example, aggregation based on specific attributes such as post codes/zip codes, local government areas or building type. For example, including an attribute of the construction era would allow aggregation by that attribute. In the case of using permutation, the exposure data must include an attribute that indicates the geographic region over which the permutation will be performed.

Example

At it’s most basic level, the following table has sufficient attributes to be used by HazImp for a wind impact calculation:

ID	Latitude	Longitude	WIND_VULNERABILITY_FUNCTION_ID	REPLACEMENT_VALUE
1	-22.99	120.01	dw1	1
2	-23.01	121.99	dw2	10
3	-22.99	122.01	dw4	100
4	-23.99	122.01	dw7	1000
5	-23	123.01	dw306	10000

Using this data, the configuration file needs to specify which attribute indicates the latitude and longitude of the assets using the exposure_latitude and exposure_longitude elements.

- load_exposure:
   file_name: <exposure.csv>
   exposure_latitude: Latitude
   exposure_longitude: Longitude