Field | Value |
---|---|
Title |
Google Earth Engine Burnt Area Map (GEEBAM) |
Alternative title(s) |
GEEBAM |
Abstract |
PLEASE NOTE: GEEBAM is an interim product and there is no ground truthing or assessment of accuracy. Fire Extent and Severity Mapping (FESM) data should be used for accurate information on fire severity and loss of biomass in relation to bushfires. The intention of this dataset was to provide a rapid assessment of fire impact. In collaboration with the University of NSW, the NSW Department of Planning Infrastructure and Environment (DPIE) Remote Sensing and Landscape Science team has developed a rapid mapping approach to find out where wildfires in NSW have affected vegetation. We call it the Google Earth Engine Burnt Area Map (GEEBAM) and it relies on Sentinel 2 satellite imagery. The product output is a TIFF image with a resolution of 15m. Burnt Area Classes:
Using GEEBAM at a local scale requires visual interpretation with reference to satellite imagery. This will ensure the best results for each fire or vegetation class. Important Note: GEEBAM is an interim product and there is no ground truthing or assessment of accuracy. It is updated fortnightly. Please see Google Earth Engine Burnt Area Factsheet |
Resource locator |
|
Show on SEED Web Map |
Name: Show on SEED Web Map Protocol: WWW:DOWNLOAD-1.0-http--download Description: Display dataset on SEED's map Function: download |
Data Quality Statement |
Name: Data Quality Statement Protocol: WWW:DOWNLOAD-1.0-http--download Description: Data quality statement for Google Earth Engine Burnt Area Map (GEEBAM) Function: download |
GEEBAM Web Map Service |
Name: GEEBAM Web Map Service Protocol: WWW:DOWNLOAD-1.0-http--download Description: Link to TIFF imagery Function: download |
Vegetation Index Web Map Service |
Name: Vegetation Index Web Map Service Protocol: WWW:DOWNLOAD-1.0-http--download Description: WMS for dNVR Vegetation Index Function: download |
Postfire Satellite Image Web Map Service |
Name: Postfire Satellite Image Web Map Service Protocol: WWW:DOWNLOAD-1.0-http--download Description: WMS for Sentinel2 PostFire Satellite Image Function: download |
PDF Burnt Area Mapping |
Name: PDF Burnt Area Mapping Protocol: WWW:DOWNLOAD-1.0-http--download Description: Google Earth Engine Burnt Area Mapping Function: download |
Download Package |
Name: Download Package Protocol: WWW:DOWNLOAD-1.0-http--download Description: GEEBAM dNBR Classes v3.1 - TIFF for download Function: download |
GEEBAM Factsheet |
Name: GEEBAM Factsheet Protocol: WWW:DOWNLOAD-1.0-http--download Description: Information and Methodology Function: download |
Unique resource identifier |
|
Code |
f3c6e3da-f356-43f9-b8df-19c2e7fc004a |
Presentation form |
Image digital |
Edition |
3.1 |
Dataset language |
English |
Metadata standard |
|
Name |
ISO 19115 |
Edition |
2016 |
Dataset URI |
https://datasets.seed.nsw.gov.au/dataset/f3c6e3da-f356-43f9-b8df-19c2e7fc004a |
Purpose |
To find out where and how wildfires in NSW have affected vegetation |
Status |
On going |
Spatial representation type |
grid |
Spatial reference system |
|
Code identifying the spatial reference system |
4283 |
Spatial resolution |
50 m |
Field | Value |
---|---|
Topic category |
Field | Value |
---|---|
Keyword set |
|
keyword value |
HAZARDS-Fire VEGETATION |
Originating controlled vocabulary |
|
Title |
ANZLIC Search Words |
Reference date |
2008-05-16 |
Geographic location |
|
West bounding longitude |
146.237694 |
East bounding longitude |
154.273533 |
North bounding latitude |
-37.786 |
South bounding latitude |
-27.224148 |
NSW Place Name |
Eastern NSW |
Vertical extent information |
|
Minimum value |
-100 |
Maximum value |
2228 |
Coordinate reference system |
|
Authority code |
urn:ogc:def:cs:EPSG:: |
Code identifying the coordinate reference system |
5711 |
Temporal extent |
|
Begin position |
2020-12-20 |
End position |
N/A |
Dataset reference date |
|
Resource maintenance |
|
Maintenance and update frequency |
Unknown |
Contact info | |
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
Field | Value |
---|---|
Lineage |
GEEBAM relies on a time series of Sentinel 2 images. Sentinel-2 (S2) is a wide-swath, high-resolution, multispectral imaging mission with a global 5-day revisit frequency. The S2 Multispectral Instrument (MSI) samples 13 spectral bands: visible and NIR at 10 meters, red edge and SWIR at 20 meters, and atmospheric bands at 60 meters spatial resolution. It provides data suitable for assessing state and change of vegetation, soil, and water cover. The SWIR bands at 20 meter mitigates smoke and haze in the atmosphere. The Google Earth Engine Burnt Extent Mapping (GEEBAM) represents the difference between the NBR (Normalized Burnt Ratio) before and after fire. It is based on a cumulative difference between imagery collected before the fires in July 2019 and the most recent imagery available from January 2020. The Normalized Burnt Ratio (NBR) NBR is an index designed to highlight burnt areas in large fire zones. The formula is similar to normalized difference vegetation index (NDVI), except that the formula combines the use of near infrared (NIR) and shortwave infrared (SWIR) wavelengths. Normalized Burnt Ratio Delta dNBR is the difference between the pre-fire and post-fire NBR (dNBR or ΔNBR). A threshold of dNBR is chosen through visual interpretation to create GEEBAM classes. A higher value of dNBR indicates increased likelihood that the area has burnt, while areas with negative dNBR values may indicate regrowth following a fire. The formula used to calculate dNBR is illustrated below: Results Thresholds have been selected based on air photo interpretation to summarise the data (Table 1). dNBR values can vary from case to case. Use at a local scale this requires visual interpretation with reference to satellite imagery and air photos in order to obtain the best results (Figure 1). A user may wish to use the thresholds or classes provided or they may choose to create their own classes. For example, a user may wish to create their own class of low dNBR values where there has been little change before and after fires. We recommend that post-fire recovery activity use DPIE’s Fire Extent and Severity Mapping (FESMv2) The DPIE Fire Extent and Severity Mapping (FESMv2) is trained and tested a on a set of 2017-1918 fire season case study fires. It also and offers an independent cross-validation assessment (i.e. predicting severity classification of new fires not used to train the model). The FESMv2 severity mapping consistently delineates severity class thresholds between fires with adherence to the API classification rules. It should be used in preference to GEEBAM where available. Data type: 16bit unsigned raster (dNBR), 8bit unsigned raster (dNBR) with attribute table containing burnt area mapping classes, 16bit unsigned raster false colour Sentinel 2 image with 3 bands. Satellite Data: Sentinel top-of-atmosphere reflectance, Level-1C orthorectified top-of-atmosphere reflectance, dataset availability: 2015-06-23 – present. Pixel size 15m Base Imagery GEEBAM_v2p1_v6E_15m_20191201_20200105_b3.tif (pre-fire). |
Field | Value |
---|---|
Limitations on public access |
|
Field | Value |
---|---|
Responsible party |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
Field | Value |
---|---|
Metadata point of contact |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
Metadata date |
2024-02-26T12:46:05.058596 |
Metadata language |
|