ArcGIS REST Services Directory
JSON

Layer: FLE_17_23 (ID:1)

View In:   Map Viewer

Name: FLE_17_23

Display Field: FCName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The Fireline Effectiveness (FLE) workflow involves a series of essential processing steps aimed at quantifying the efficiency of fireline containment strategies. This workflow begins with the input of fireline data that has undergone Quality Assurance and Quality Control (QAQC) obtained from the second tool associated with this model , and is then attributed to an individual fire as well as a perimeter dataset sourced from the National Interagency Fire Center (NIFC). The workflow comprises the following key steps:Fireline Buffering: To consolidate adjacent firelines, the workflow initiates by buffering firelines within a 50-meter proximity of each other. Buffers are generated around the fire perimeter to identify distinct areas: held, not engaged, and burned over. A 50-meter buffer is applied, encompassing both 25 meters within and 25 meters outside of the fire perimeter.Firelines intersecting the held area are buffered to 75 meters, and clipped to the perimeter held area, effectively filling in the perimeter held area. This step computes the Held Area to Held Perimeter Area (HaPar) ratio, which is used by multiplying the fire perimeter length by HaPar to determine the length of held firelines. This method is chosen for its ability to account for perimeter complexity while ensuring that held fireline length does not exceed the perimeter. The workflow calculates not engaged and burned over line segments by halving the perimeter of the buffered fireline polygon. A perimeter-to-area ratio PrAr is calculated, recognizing that perimeter complexity and resolution can influence fireline metrics. A Fire Management Complexity Team attribute is included in the output, sourced from NIFC attribution, which enhances an understanding of perimeter complexity. Following these comprehensive processing steps, the workflow then calculates the various FLE metrics. The results are delivered in two formats: as a feature class, facilitating spatial analysis, and as an Excel sheet, enabling data manipulation and reporting.These processing steps collectively enable the evaluation of fireline effectiveness at an incident level, considering factors such as containment strategy success, perimeter complexity, and the incident's operational context. FLE Metrics:The FLE metrics included in this product offer a nuanced understanding of containment strategy performance:HTr (Held Line to Total Line Ratio): This metric quantifies the effectiveness of fireline containment efforts by determining the proportion of fireline that was successfully held in relation to the total length of fireline established during the incident.Tr (Total Line to Fire Perimeter Ratio): Tr measures the extent of containment strategy implementation by evaluating the ratio of the total length of firelines constructed to the final extent of the wildfire's perimeter.Er (Engagement Ratio): Er provides insights into the overall containment strategy's success by considering both held fireline and fireline that was burned over in relation to the total fireline length. This metric captures the comprehensive impact of containment efforts.HER (Held Line Engagement Ratio): Focusing on the effectiveness of held fireline, HER calculates the proportion of fireline that was successfully held in comparison to the total of held and burned over fireline. It highlights the efficiency of containment in preserving established firelines.BTR (Burned Over Line to Total Line Ratio): BTR quantifies the proportion of fireline that was burned over relative to the total length of fireline constructed during the incident. This metric offers insights into areas where containment efforts may have been less effective.NeTr (Not Engaged Line to Total Line Ratio): NeTr evaluates the extent to which firelines were strategically placed to engage with the wildfire. It quantifies the proportion of fireline that did not engage with the wildfire relative to the total fireline length.These metrics collectively can assist in a comprehensive assessment of containment strategy efficiency and investment.

Copyright Text: This GIS product was created by Alexander Arkowitz (alexander.arkowitz@colostate.edu), a Forest Service contractor and Geospatial Research Associate IV at Colorado State University, and Dr. Matthew Thompson (matthew.p.thompson@usda.gov), a Research Forester for the US Forest Service in the Human Dimensions program.

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field: Engagement

Fields:
Types:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 7/2/2024 5:23:42 PM

Schema Last Edit Date: 7/2/2024 5:23:42 PM

Data Last Edit Date: 7/2/2024 5:02:37 PM

Supported Operations:   Query   Query Pivot   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates   ConvertFormat