Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20070901 Title: Purdy Fire of Bridger-Teton National Forest and Shoshone National Forest - 2006 Geospatial_Data_Presentation_Form: Raster digital data. Vector data are also available as ArcView Shape Files. Publication_Information: Publication_Place: Sioux Falls, South Dakota USA Publisher: U.S. Geological Survey Online_Linkage: http://edc.usgs.gov Description: Abstract: The U.S. Geological Survey (USGS) has entered into a cooperative agreement with the National Park Service (NPS) to deliver satellite imagery and derivitive products centered on major fires that impact national parks and other federal lands. This data set was compiled at the request of a federal land management agency and is part of a suite of products generated for a specific fire. See the National Burn Severity Mapping web site at: http://edc2.usgs.gov/fsp/severity/fire_main.asp Purpose: The purpose of this project is to develop a robust mapping methodology and consistent data products that allow federal land managers and fire ecologists to evaluate and compare burn severity within individual fires and between fires across various ecosystems. These products will help land managers to more effectively plan, implement and monitor fire recovery activities. Supplemental_Information: Fire Name: Purdy Agency: US Forest Service Land Management Units: Bridger-Teton National Forest, Shoshone National Forest Date of Fires: 8/5/2006 Type of assessment: Extended Acres within Fire Perimeter: 20040 Landsat Path and Row: 38/30 Pre-Fire Landsat Date/Scene ID: Landsat 5; Aug. 1, 2003/LT5038030000321310 Post-Fire Landsat Date/Scene ID: Landsat 5; Aug. 12, 2007/LT5038030000722410 Output Dataset Projection: UTM UTM Zone: 12 Datum Name: NAD83 Spheroid Name: GRS80 Image subsets Corner Coordinate (center of upper left pixel, projection meters) ULX: 564690 LRX: 590910 ULY: 4835070 LRY: 4808310 Image subset size: #Rows: 893 #Columns: 875 Pixel size: 30 meters Bounding Box: North Lat: 43 39 55 N South Lat: 43 25 25 N East Long: 109 52 31 W West Long: 110 11 58 W Latitude and Longitude within Fire Perimeter Lat: 43 33 20 N Long: 110 02 01 W Fire Perimeter: Digitized from Landsat imagery, following park-provided perimeters in areas of very low severity. For further information on NLAPS and Landsat TM data, please refer to the metadata documentation found on the USGS Clearinghouse website at: http://www.fgdc.gov/clearinghouse/clearinghouse.html Product List: purd06b_pretm.tif August/2003 Pre-Fire Landsat data subset (bands 1-5,7 Geo-TIFF format) purd06b_postm.tif August/2007 Post-Fire Landsat data subset (bands 1-5,7 Geo-TIFF format) purd06b_dnbr Differenced Normalized Burn Ratio (DNBR) subset (signed 16 bit ArcInfo GRID) purd06b_pi Fire Perimeter (shape file) purd06b_hist.xls DNBR pixel count within the fire perimeter (excel file) d383008030807 08/03 - 08/07 Full Scene DNBR for Path Row 38/30 (signed 16 bit ArcInfo GRID) Also See the Burn Severity Website: http://burnseverity.cr.usgs.gov/fire_main.asp Questions Please Contact: Stephen Howard 605 594 6027 smhoward@usgs.gov Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 20030801 (pre-fire image) Single_Date/Time: Calendar_Date: 20060805 (date fire began) Single_Date/Time: Calendar_Date: 20070812 (post-fire image) Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: as needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -110.11.58 East_Bounding_Coordinate: -109.52.31 North_Bounding_Coordinate: 43.39.55 South_Bounding_Coordinate: 43.25.25 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: burn mapping Theme_Keyword: imagery Theme_Keyword: fire Theme_Keyword: Landsat Theme_Keyword: US Forest Service Place: Place_Keyword_Thesaurus: none Place_Keyword: Bridger-Teton National Forest Place_Keyword: Shoshone National Forest Place_Keyword: Purdy Place_Keyword: Wyoming Access_Constraints: FTP data sets are available to any user. Use_Constraints: There are no restrictions on use, except for reasonable and proper acknowledgement of information sources. Point_of_Contact: Contact_Information: +001 605-594-6151 or (USA) 800-252-4547 Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Position: CSR Contact_Voice_Telephone: +001 605-594-6151 Contact_Address: Address_Type: physical and mailing address Address: 47914 252nd Street City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Country: USA Contact_TDD/TTY_Telephone: +001 605-594-6933 Contact_Voice_Telephone: +001 605-594-6151 Contact_Facsimile_Telephone: +001 605-594-6589 Contact_Electronic_Mail_Address: fsedc@usgs.gov Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT Contact_Instructions: http://edc2.usgs.gov/fsp/severity/contact_us.asp Data_Set_Credit: USGS and NASA Native_Data_Set_Environment: Oracle, ERDAS Imagine, & ArcInfo Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Three on-board calibrators (two solar, one internal) provide an absolute accuracy of 5 percent, excluding band 6. Logical_Consistency_Report: These Landsat data are collected from a nominal altitude of 705 kilometers in a near-polar, near-circular, sun-synchronous orbit at an inclination of 98.2 degrees, imaging the same 183-km swath of Earth's surface every 16 days. The pixels representing the bands for the image are in the data set only once. Completeness_Report: Fire perimeter was automated, (seed value 425, distance 325) with manual edits. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Energy reflected from Earth's surface passes through a whisk-broom scanning system and all-reflective optics before being collected by the solid-state detectors at the focal plane. Lineage: Process_Step: Process_Description: These data products are derived from Landsat Thematic Mapper data. A pre-fire scene and a post-fire scene are analyzed to create a Differenced Normalized Burn Ratio (DNBR) image. The DNBR image portrays the variations of burn severity within the fire. The Landsat images are terrain corrected and geometrically rectified to an Albers Conical Equal Area map projection using the National Landsat Archive Production System (NLAPS). The images are further processed to convert bands 1-5 and 7 to at-satellite-reflectance. The Normalized Burn Ratio (NBR) is computed for each date of imagery using the following formula: (Band 4 - Band 7) / (Band 4 + Band 7) = NBR The differenced NBR is computed by subtracting the post-fire NBR from the pre-fire NBR: PreNBR - PostNBR = DNBR Higher DNBR values are correlated with more severe burns. The DNBR image is evaluated to determine the threshold value between burned and unburned areas. The perimeter of the fire is delineated using the DNBR image. The DNBR image, the pre-fire and post-fire TM images, and a fire perimeter vector file are provided in digital format in the map projection used by the National Park Service. Source_Used_Citation_Abbreviation: TM Process_Date: 200708 Source_Produced_Citation_Abbreviation: DNBR Cloud_Cover: 10 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Position: Principal Scientist Land Cover Applications Contact_Address: Address_Type: mailing and physical address Address: 47914 252nd Street USGS EROS City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Country: USA Contact_Voice_Telephone: +001 605-594-6151 Contact_TDD/TTY_Telephone: +001 605 594-6933 Contact_Facsimile_Telephone: +001 605 594-6589 Contact_Electronic_Mail_Address: fsedc@usgs.gov Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT Contact_Instructions: http://edc2.usgs.gov/fsp/severity/contact_us.asp Distribution_Liability: No warranty expressed or implied is made by the USGS regarding the use of the data, nor does the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Geo-TIFF Format_Version_Number: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://edc2.usgs.gov/fsp/severity/download_data.asp Digital_Form: Digital_Transfer_Information: Format_Name: DNBR ArcInfo GRID Format_Version_Number: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://edc2.usgs.gov/fsp/severity/download_data.asp Digital_Form: Digital_Transfer_Information: Format_Name: shape file Format_Version_Number: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://edc2.usgs.gov/fsp/severity/download_data.asp Fees: No charge Ordering_Instructions: http://edc2.usgs.gov/fsp/severity/help.asp#ordering Turnaround: same day Metadata_Reference_Information: Metadata_Date: 20070904 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS EROS Science & Applications Branch Contact_Position: Principal Scientist Land Cover Applications Contact_Address: Address_Type: mailing and physical address Address: 47914 252nd Street USGS EROS City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Country: USA Contact_Voice_Telephone: +001 605-594-6151 Contact_TDD/TTY_Telephone: +001 605-594-6933 Contact_Facsimile_Telephone: +001 605-594-6589 Contact_Electronic_Mail_Address: fsedc@usgs.gov Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT Contact_Instructions: http://edc2.usgs.gov/fsp/severity/contact_us.asp Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none