BC Wildfire PSTA Spotting Impact

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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.

Spotting was modeled by fuel type and by distance class from a given fuel type pixel. The risk of spotting within a given pixel was analyzed based on the risk presented by the surrounding fuel pixels, with distance radii based on fuel type. Distance class categories were analyzed as concentric circles around the target fuel patch, with higher ranking values associated with shorter distances, and with more volatile fuel types. The chance of spotting was considered to be “nil” for distances over two kilometers. Spotting values represent the estimated threat associated with 12 relevant fuel type-distance classes. The relative threat associated with each fuel type-distance class was ranked (“Spotting Rank”), based on expert opinions on the most frequent spotting concerns observed during wildfires. The rank values were assigned risk scores (weighting factor), which were adjusted to normalize the areas (since the larger concentric circles cover much more area than smaller ones). Each raster pixel (50 meter resolution) was then assigned a total score based on the sum of risk values contributed by all pixels within a radius of 1-2 kilometers. Based on this total score, the landscape was categorized into 10 spotting classes ranging from low to extreme.The classes were created by automatic classification, using the “natural breaks (Jenks)” setting of the ArcGIS 10.1 Spatial Analyst extension. Differences are caused by fuel type classes and distances, with no consideration given at this time to elevation or dominant wind direction. Future versions of this analysis will likely address both of these factors.Water bodies were overlaid on the raster and assigned their own class, -1.

Data and Resources

Dataset Extent

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

Additional Information

Purpose

To support wildfire prevention initiatives.

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_SPOTTING_IMPACT_SP

Short Name: PROTPSTASP
Comments: Provincial Strategic Threat Analysis (PSTA) Public Spotting Impact values represent the estimated threat associated with 12 relevant fuel type-distance classes. The relative threat associated with each fuel type-distance class was ranked (Spotting Rank), based on expert opinions on the most frequent spotting concerns observed during wildfires.

Column Name Short Name Data Type Data Precision Comments
PROT_PSI_SYSID PRT_PS_SYD NUMBER 10 PROT_PSI_SYSID is a system generated unique identification number.
SPOTTING_IMPACT_CLASS SPTTNG_MPS 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).
SPOTTING_IMPACT_CLASS_DESC SPTTNG_MPC 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.