Fire Behavior - Ignition Probability
Raster Dataset - ESRI GRID - ignit_prob
FGDC, ESRI Metadata
Show Definitions
Description | Spatial | Data Structure | Data Quality | Data Source | Data Distribution | Metadata
Description
Citation
Information used to reference the data.
Title: Fire Behavior - Ignition Probability
Originators: Documentation "Idaho Interagency Assessment of Wildland Fire Risk to Communities" approved by Idaho State Fire Plan Working Group. Assessment completed by Jeff Jones, Landscape Ecologist, Flathead National Forest
Idaho State Fire Plan Working Group
Bureau of Land Management, National Science and Technology Center
Publisher: U.S. Department of the Interior (DOI), Bureau of Land Management (BLM), Idaho State Office
Publication place: Boise, Idaho, USA
Publication date: 2007
Data type: raster digital data
Description
A characterization of the data, including its intended use and limitations.
Abstract:
An ignition probability layer (fire density) was derived using an interpolation process (ArcInfo; pointinterp) of the fire start data.   2-km cells were used for the interpolation process because fire locations were commonly only reported to the nearest Public Land Survey Section (PLSS), approximately 1 square mile.  Interpolation resulted in 2-km cells being attributed with the count of ignitions.  Ignition probability was derived by classifying the density data into 5 classes (low to high) using the "natural break" algorithm included in ArcMap. 

The values represent relative values that have been standardized between 0.0 and 1.0
Purpose:
These data were designed to characterize mid-scale patterns across Idaho of Wildland Fire Ignition Probability.   They were developed specifically for use in characterizing relative wildland fire risk which was then used to assess the risks of wildland fire to communities.

This dataset was used in the "Idaho Interagency Assessment of Wildland Fire Risk to Communities, 2007", Map 4B.  It was created for the Statewide Interagency National Fire Plan Working Group to which the Bureau of Land Management (BLM), Idaho is a member.  It has also been used in other BLM planning efforts such as Resource Management Plans, Fire Management Plans, and NEPA analysis.

General Limitations

These data were designed to characterize mid-scale patterns across the state of Idaho at a scale of approximately 1:100,000.  The use of these data at scales less than 1:100,000 is not recommended without field verification.

Although the resolution of this theme is a 90-m cell, the expected accuracy does not warrant its use for geographic extents smaller than approximately 10,000 acres.  That is, these data were not designed to be used for "project level" assessments that typically require 1:24,000 scale data.
Supplemental information:
Originally, fire occurrence point data were obtained for the period 1983 to 2002 from firefighter report forms (DI-1202 for Department of Interior agencies, 5100-29 for FS, and DL-850B from IDL) that had been compiled by Bureau of Land Management (BLM), Bureau of Indian Affairs (BIA), US Fish and Wildlife Service (USFW), National Park Service (NPS), US Forest Service (USFS), Idaho Department of Lands (IDL), and the Montana Department of Natural Resources (MDNR).  This period of time was selected to promote consistency among the various federal and state agencies.

 These data were problematic due to data input errors, especially with respect to location; fires with erroneous locations were discarded. Rural and volunteer fire department data were not used in this analysis because no consistent fire reporting system and data source was available. Upon review of these data, the Idaho State Fire Plan Working Group (ISFPWG) Technical Team decided to use a compilation that was conducted by the BLM National Science and Technology Center (NSTC) for fires recorded on Federal lands. The compiler of these data also reported that these data contained many errors.  These data were clipped to within a 10-k buffer of the Idaho state line.  Fires reported by the states of Idaho, IDL and Montana, DNRC, within 10-k buffer of Idaho were then added to the BLM NSTC compiled data.

Ignition probability was derived using all ignitions recorded from federal and state lands, both human and lightning caused.  Ignition probability in this analysis describes the number of fires per 4KM2/20 years. A high rating indicates areas where relatively more fires occur per unit area.

Two methods were used to derive ignition probability: (1) using all ignitions; and (2) using only ignitions resulting in fires that exceeded 10-ac.  This was to assess whether there was a difference in ignition patterns in respect to fire size.  Ignition patterns seemed to be almost the inverse of each other.  In general, these data suggested that northern Idaho has many fires that do not burn substantial areas.  Conversely, southern Idaho has fewer fires, but substantially more area is burned.  The ISFPWG technical committee decided to use the ignition probability data derived from all fires to derive ignition probability.   Fire weather and fuels were evaluated independently.

Ignition Probability data were standarized between 0.0 and 1.0 prior to their use in diriving Relative Wildland Fire Risk.
Dataset credit:
Jeff Jones, Landscape Ecologist, Flathead National Forest; Idaho State Fire Plan Working Group
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: Bureau of Land Management, Idaho State Office
Position: GIS Specialist
Phone: 208-373-4000
Fax: 208-373-3949
Hours of service: 8-4:30, M-F, MST
Address type: mailing and physical address
Address:
Bureau of Land Management, Idaho State Offcie
Address:
1387 S. Vinnell Way
City: Boise
State or Province: ID
Postal code: 83709
County: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: ignit_prob
Data type: raster digital data
Data format: Raster Dataset
Native dataset environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.1.0.722
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Date: 2004
Currentness reference:
2004
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: None planned
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: Ignition Probability, Wildland Fire, Communities at Risk, Fire, Fire Density, Fire Ignition, Fire Start
Keyword thesaurus: BLM-Idaho-Theme
Theme:
Keywords: Idaho State Fire Plan
Keyword thesaurus: None
Theme:
Keywords: biota
Keyword thesaurus: ISO 19115 Topic Category
Place:
Keywords: Idaho
Keyword thesaurus: BLM-Idaho-Theme
Temporal:
Keywords: 1983-2002
Keyword thesaurus: BLM-Idaho-Theme
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
Public
Use constraints:
No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.

These data were designed to characterize mid-scale patterns across the state of Idaho at a scale of approximately 1:100,000.  The use of these data at scales less than 1:100,000 is not recommended without field verification.

This data set is provided "as-is" without warranty of any kind, including, but not limited to, the implied warranties of merchantability and fitness or a particular purpose.  The user assumes all responsibility for the accuracy and suitability of this dataset for a specific application.  In no event will the creators or USDA Forest Service be liable for any damages, including lost profits, lost savings, or other incidental or consequential damages arising from the use of or inability to use this data set.  Use of these data may require the ability to read ArcInfo Grid datasets.  

Although the resolution of this theme is a 90-m cell, the expected accuracy does not warrant its use for geographic extents smaller than approximately 10,000 acres.  That is, these data were not designed to be used for "project level" assessments that typically require 1:24,000 scale data.
Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: NAD 1983 Transverse Mercator
Map units: meters
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Transverse Mercator
Scale factor at central meridian: 0.999600
Longitude of central meridian: -114.000000
Latitude of projection origin: 42.000000
False easting: 2500000.000000
False northing: 1200000.000000
Planar Coordinate Information
Planar coordinate encoding method: row and column
Coordinate representation:
Abscissa resolution: 90.000000
Ordinate resolution: 90.000000
Planar distance units: meters
Geodetic model
Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
NAD 1983 Transverse Mercator
Boundary Coordinate
Left 2239044.208407 (meters)
Right 2747004.208407 (meters)
Top 1984056.289498 (meters)
Bottom 1196016.289498 (meters)
In Unprojected coordinates (geographic)
GCS North American 1983
Boundary Coordinate
West -117.568245 (longitude)
East -110.622168 (longitude)
North 49.057360 (latitude)
South 41.920974 (latitude)
Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview:
Vaues in this GRID represent relative values that have been standardized between 0.0 and 1.0 (0.0 = low; 1.0 = high).  ArcMap  reclassify  5 classes "natural breaks"  used for display
Direct spatial reference method: Raster
Attributes of ignit_prob
Detailed descriptions of entity type, attributes, and attribute values for the data.
Description:
Floating Point Grid, standarized 0-1, see abstract and attribute overview
Source:
Contractor
Attributes
Value
Definition:
Relative value that has been standardized between 0.0 and 1.0
Attribute definition source:
Contractor
Raster Information
Type and number of raster spatial objects in the data.
Raster format: ESRI GRID
Raster object type: Grid Cell
Number of raster bands: 1
Raster properties
Raster origin: Upper Left
Has pyramid layers: FALSE
Has image colormap: FALSE
Compression type: Default
Raster display type: matrix values
Cell information
Number of cells on x-axis: 5644
Number of cells on y-axis: 8756
Number of cells on z-axis: 1
Bits per cell: 32
Cell Size:
X direction: 90.000000
Y direction: 90.000000
Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
No formal tests performed, see supplemental section
Completeness report:
See supplemental section
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
Consistent with fires as reported by Federal and state agencies
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
No formal test perfored - see supplemental section
Data Source and Process Information
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
We ran POINTINTERP on the fire start data using a 2-km2 grid to derive ignition density. These data were then standardized between 0.0 and 1.0.
Person: Jeff Jones
Organization: Flathead National Forest
Position: Landscape Ecologist
Phone: 406-758-5341
Hours of service: 8-4:30, M-F, MST
Address type: mailing and physical address
Address:
Flathead National Forest
Address:
1935 3rd Ave. E
City: Kalispell
State or Province: MT
Postal code: 59906
County: USA
Process date: Unknown
Process software and version: ArcGIS
Process Step 2
Process description:
Dataset Copied, Metadata Imported
Source data projected from IDTM NAD27 to IDTM NAD83, nearest neighbor

Project GRID in  out  # Nearest 90  (source)
 OUTPUT
 Projection    TRANSVERSE
 Datum         NAD83
 Zunits        NO
 Units         METERS
 Spheroid      GRS1980
 Xshift        0.0000000000
 Yshift        0.0000000000
 Parameters
 0.99960000 
 -114  0  0.000 
  42  0  0.000 
  2500000.00000 
  1200000.00000 
  END
Organization: Bureau of Land Management, Idaho State Office
Position: GIS Specialist
Phone: 208-373-4000
Hours of service: 8-4:30, M-F, MST
Address type: mailing and physical address
Address:
Bureau of Land Management, Idaho State Office
Address:
1387 S. Vinnell Way
City: Boise
State or Province: ID
Postal code: 83709
County: USA
Process date: Unknown
Process software and version: ArcGIS 9.1
Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Downloadable GIS Data
Distribution liability:
Although these data have been processed successfully on a computer system at the Idaho Geospatial Data Clearinghouse, no warranty, expressed or implied, is made regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. 
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: Idaho Geospatial Data Clearinghouse
Person: Bruce Godfrey
Position: GIS Specialist
Phone: 208.262.2076
Email: bgodfrey@uidaho.edu
Address type: mailing address
Address:
Box 442350
City: Moscow
State or Province: ID
Postal code: 83844-2350
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: ESRI GRID
Size of the data: 0.000
Transfer size: 0.000
Digital transfer option:
Fees: None
Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20130106
Language of metadata: en
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: Bureau of Land Management, Idaho State Office
Position: GIS Specialist
Phone: 208-373-4000
Fax: 208-373-3949
Hours of service: 8-4:30, M-F, MST
Address type: mailing and physical address
Address:
Bureau of Land Management, Idaho State Office
Address:
1387 South Vinnell Way
City: Boise
State or Province: ID
Postal code: 83709
County: USA
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
Metadata profiles defining additonal information:
Profile: ESRI Metadata Profile
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.0
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.