In the absence of data for built-up areas, population density figures per barangay were obtained by evenly distributing population across each barangay.īarangays prone to hazard = barangays ∩ hazard Values for prone population, schools, and health facilities per barangay, and prone barangays per municipality were summed up to obtain the values shown on the table. Lastly, it should be noted that administrative boundaries used are only an approximate and are not considered authoritative.Ĭalculation for the level of exposure or proneness of barangays to hazards incorporates the slightest intersection between the barangay boundary and hazard layers. Hence, users are advised to view the hazard map overlain with the administrative boundary layer to visually verify how much of the area is within the scope of the hazard. Similarly, administrative boundaries and the scope of the hazard may not fit well when calculating for their intersection. Also, hazards information may be refined and updated as new data become available to the system.įor point data for schools and health facilities, they may not represent the actual location of the facility and may need further verification. Since some data used for calculations may be outdated, GeoRiskPH will not be liable for results that may differ from actual data. HazardHunterPH consumes existing information as provided by agencies to the GeoRiskPH Integrated System.
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