mapping fire events using an open source tool. department of the interior u.s. geological survey...

U.S. Department of the Interior

U.S. Geological Survey

Mapping Fire Events Using an Open Source

ToolSouth Dakota Statewide Geospatial Conference, Mitchell, SD

7/25/2017

Josh Picotte

[email protected]

ASRC Federal InuTeq LLC, Contractor to the U.S. Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center, Contract Number G13PC00028

Special Thanks To:

USGS Project Lead: Steve Howard

Tool Project Lead: Michelle Anthony

Tool Developers: Cheryl Holen and Karthik

Vanumamalai

NASA Applied Sciences Program-

Wildfires: Project NNH12AU71I

Overview Defining burn severity

Overview of Monitoring Trends in Burn

Severity (MTBS)

MTBS Mapping protocols

Demonstration of QGIS Fire Event Mapping

Tool (EMT)

Fire (Burn) Severity

The effect of a fire on ecosystem properties,

often defined by the degree of mortality of

vegetation.

Degree to which a site has been altered or

disrupted by fire; loosely, a product of fire

intensity and residence time.

Photo courtesy of Stefan Doerr

MTBS Overview

Sponsored by Wildland Fire Leadership

Council (WFLC)

Map all 1984-2010 fires

>1000 acres West and > 500 acres East

CONUS, AK, HI, and PR

Ken Marchand (USFS)

Burn Severity MappingP

refire

Po

stf

ire

dNBR or dNDVI

Thresholded

Severity

Product

Reflectance NBR or NDVI

Difference

Image processing method depends on which sensor is used…

NBR(Normalized Burn Ratio)NBR = (NIR - SWIR) / (NIR + SWIR)

dNBR = Prefire NBR - Postfire NBR

NDVI(Normalized Difference Vegetation Index)NDVI = (NIR - RED) / (NIR + RED)

dNDVI = Prefire NDVI - Postfire NDVI

QGIS Event Mapping

Tool (EMT)

Demonstration

2016 Range 12 Fire

7/30/2016-

8/7/2017

Latitude:

46.599

Longitude:

-120.203

176,600 acres

14 Miles East

of Yakima

Sagebrush

SteppeInciWeb: https://inciweb.nwcg.gov/incident/4915/

EMT Mapping Demonstration:

2016 Fire Detections

QGIS Background

http://www.qgis.org/en/site/

QGIS

Interface

QGIS Event Mapping Tool (EMT)


EMT Tool


Search Landsat Archive


Landsat Scene List


Add Fire Information


Fire Record


Load Landsat Image


Post-Fire Landsat Image


2016 Fire Detections

*


Pre-Fire Landsat Image


Identify Analysis Images


Create Unique Fire Mapping


Create dNBR Image


dNBR Image


QGIS Project


Map Fire (Burned Area Bndy)


Mapped Fire Perimeter


Mask Problem Areas (e.g. Clouds)


Suggested Burn Severity Breakpoints


Create Burn Severity Image


Burn Severity Image


Severity Problems in Agriculture


Revised Thresholds


“Final” Burn Severity Image

Initial Vs Final Burn Severity Map

Initial Final

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mapping fire events using an open source tool. department of the interior u.s. geological survey...

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