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Web Application

The RZRisk web application provides immediate access to wildfire hazard ratings and nearby historical wildfires for any location in California.  This information can be obtained from a street address, geographical coordinates (latitude and longitude) or by placing a point on the map.


REQUEST
Entering Addresses
The address entry form works best if the address (number and street), city, state and zip are entered in the separate fields provided.  RZRisk relies on a state-of-the-art commercial geocoding provider to search current parcel and street databases to obtain the best possible match. The resulting report is run using the geographic location of that match.  The report includes two ways to measure geocoding effectiveness:

GEOSCORE: This is RedZone’s proprietary scheme for rating the confidence that can be given to a geocoding result.  It is calculated by measuring the similarity of the best-match address to the requested address as well as (where available) a geospatial comparison of the resulting point with those provided by alternate geocoding sources.  These ratings can be defined as:

  • GOOD – there is every reason to believe that this is the correct location
  • REASONABLE – this location is either correct or close to the requested address
  • SUSPECT – this location may be correct, but additional confirmation is advised
  • PROBLEMATIC – this location is only approximate and may be inappropriate for geospatial analysis
  • BAD – this location may not be correct at all due to significant discrepancies in the geocoding result
  • UNKNOWN – The location description cannot be parsed as a standard address

    GEOPRECISION: This value indicates the precision of the source data from which the best match address was obtained.  It is a contributing factor to the GeoScore but may be independently useful in evaluating results.  Although this system includes less precise ratings, RZRisk will not provide hazard values unless the requested address can be geocoded at at least ADDRESS precision.  The relevant ratings can be defined as:

  • ROOFTOP – the center of a structural footprint
  • PARCEL – the center of a specific property as shown on public record
  • ADDRESS – the calculated position along a road segment within an address range

    NOTE: It is possible to enter the entire address on a single line leaving the input boxes for city, state and zip empty.  The result may be equivalent to entering each field separately but GeoScore will always be reported as PROBLEMATIC.

Entering Coordinates
Geographic coordinates can be entered from the keyboard or entered using copy-and-paste.  Longitude and latitude must be in decimal degrees separated by either a space or a comma.  Example: 34.12345, -116.45678 Order does not matter since RZRisk assumes longitude to be negative and latitude to be positive.

Checking the “Click map for coordinates” option will automatically populate the coordinates box with a point clicked on the map.  This action can be repeated multiple times before requesting a report.


RESPONSE
“Run Report” executes a call to the RZRisk hazard rating service and returns a complete report for the requested location.  It contains the following elements:

  • Address – This is the best address match that RZRisk can find.  Please confirm that it is equivalent to the address requested!
  • Location – This is the longitude and latitude of the matching address.  It is the point used to obtain all other values.
  • Site Hazard – The ignition potential of the immediate area in which the point was found
  • Zone Hazard – The ability of the fuels and topography surrounding the requested point to sustain wildfire
  • Miles to Higher Zone – This is the distance from the requested point to the nearest zone in which the Zone Hazard is higher
  • Geocoding Results – The GeoPrecision and GeoScore as described above
  • Nearby Fire Summary – The number, average distance and average size of all historical wildfires within 20 miles of the request point
  • Fire History – A list of all the wildfires included in the Nearby Fire Summary, sortable by all columns
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