BC Wildfire PSTA Head Fire Intensity

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Published by the Ministry of Forests, Lands, Natural Resource Operations and Rural Development - BC Wildfire Service
Licensed under Access Only

Provincial Strategic Threat Analysis (PSTA) is designed to consistently assess and map potential wildfire threats to values across the landscape (including communities, infrastructure and natural resources) and to integrate different aspects of wildfire hazard and risk.

The Head Fire Intensity (HFI) data layer was developed using the 90th percentile fire weather index value for an interpolated and elevation-adjusted analysis of weather station values. This value represents the daily FWI value at which 10% of all interpolated observations at that location exceed the value identified. These were calculated by interpolating daily weather records from the network of active and archived BC Wildfire Service and other (e.g. Environment Canada, BC Ministry of Environment Snow Pillow, etc. ) weather stations. The HFI (90th percentile) values were classified using accepted thresholds of fire intensity and fire suppression effort. The HFI classes used in the final threat layer are different from the defined HFI classes derived from the Fire Behavior Prediction System because the values need to be spread across 10 categories. The intensity values in the HFI data layer therefore represent daily peak burning HFI values representative of a small number of days (~ 1-15) in an average year based on the fuels identified in provincial inventory in early 2017. By definition, these represent high to extreme values for any given location. The final classification scheme for the HFI (90th percentile weather) layer was chosen to represent accepted fire intensity thresholds (in kW/m) associated with suppression difficulty, along with some additional classes added to further discriminate between intensity levels at the high end (i.e. crown fires).Water bodies were overlaid on the raster and assigned their own class, -1. A Private Managed Forest Land (PMFL) and Private Land (PL) mask was applied to the data due to fuel typing limitations in these areas. Each of these were given their own class. PMFL is class -2 and PL is class -3.

Data and Resources

Dataset Extent

Latitude: 48.0° to 60.0°
Longitude: -139.5° to -113.5°

Additional Information

Contact Information

NameDevona Hay (pointOfContact)
EmailBCWILDFIREGEO@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationBC Wildfire Service
NameDana Hicks (businessExpert)
EmailDana.Hicks@gov.bc.ca
OrganizationMinistry of Forests, Lands, Natural Resource Operations and Rural Development
Sub-OrganizationBC Wildfire Service

Access & Security

Who can view this dataset? Public
Who can download this dataset?Public

Metadata Information

Record Published 2020-02-05
Record Last Modified 2020-02-18
Resource Status underDevelopment
Spatial DataSDO_GEOMETRY

Object Description

Object Name: WHSE_LAND_AND_NATURAL_RESOURCE.PROT_PSTA_HEAD_FIRE_INTNSTY_SP

Short Name: PROTPSTAHE
Comments: Provincial Strategic Threat Analysis (PSTA) head fire intensity (HFI) represents the final classification scheme (90th percentile weather). The layer was chosen to represent accepted fire intensity thresholds (in kW/m) associated with suppression difficulty, along with some additional classes added to further discriminate between intensity levels at the high end (i.e., crown fires).

Column Name Short Name Data Type Data Precision Comments
PROT_PHFI_SYSID PRT_PHF_SD NUMBER 10 PROT_PHFI_SYSID is a system generated unique identification number.
HFI_CLASS HFI_CLASS NUMBER 5 A class value signifying the head fire intensity rating from low to extreme. These values directly relate to the text description in the HFI Class Range field, i.e., -3 (No Data (Private Land)), -2 (No Data (Private Managed Forest Land)), -1 (Water), 0 (No Impact), 1 (Low), 2 (Low), 3 (Low), 4 (Moderate), 5 (Moderate), 6 (Moderate), 7 (High), 8 (High), 9 (Extreme), 10 (Exteme).
HFI_CLASS_RANGE HFI_CL_RNG VARCHAR2 50 Textual descriptions of the class range field signifying the head fire intensity rating from low to extreme, i.e., No Data (Private Land), No Data (Private Managed Forest Land), Water, No Impact , Low, Moderate, High, Extreme.
FEATURE_AREA_SQM FEAT_AREA NUMBER 19 FEATURE_AREA_SQM is the system calculated area of a two-dimensional polygon in square meters.
FEATURE_LENGTH_M FEAT_LEN NUMBER 19 FEATURE_LENGTH_M is the system calculated length or perimeter of a geometry in meters.
SHAPE SHAPE SDO_GEOMETRY 1 SHAPE is the column used to reference the spatial coordinates defining the feature.
OBJECTID OBJECTID NUMBER 38 OBJECTID is a column required by spatial layers that interact with ESRI ArcSDE. It is populated with unique values automatically by SDE.
SE_ANNO_CAD_DATA BLOB 4000 SE_ANNO_CAD_DATA is a binary column used by spatial tools to store annotation, curve features and CAD data when using the SDO_GEOMETRY storage data type.