Historical Fire Extent and Severity Mapping (FESM)

Fire severity is a metric of the loss of biomass caused by fire. In collaboration with the NSW Rural Fire Service, DCCEEW Remote Sensing & Regulatory Mapping team has developed a semi-automated approach to mapping fire extent and severity through a machine learning framework based on satellite imagery. \r\n\r\nThe method uses standardised classes to allow comparison of different fires across the landscape. The FESM severity classes include: unburnt, low severity (burnt understory, unburnt canopy), moderate severity (partial canopy scorch), high severity (complete canopy scorch, partial canopy consumption), extreme (full canopy consumption). \r\n\r\nHere we provide historical severity mapping for 8 priority regions on National Parks land tenure from 1989/90 to 2015/16, which is based on Landsat satellite imagery. This covers approximately 30% of the NPWS Managed Lands, across a wide range of vegetation types. From 2016/17 to the current fire year, these regions are covered in the statewide FESM data, which is based on Sentinel 2 satellite imagery. Ongoing FESM processing aims to achieve statewide coverage back to 1989/90, in staged released, as resources permit.\r\n

火灾严重程度是衡量火灾导致生物量损失的指标。DCCEEW遥感与监管测绘团队与新南威尔士州农村消防局合作，基于卫星影像开发了一套通过机器学习框架绘制火灾范围和严重程度的半自动方法。

该方法采用标准化类别，以便对不同区域的火灾进行比较。FESM严重程度类别包括：未燃烧、低严重程度（林下植被燃烧，树冠未燃烧）、中度严重程度（部分树冠烧焦）、高度严重程度（完全树冠烧焦，部分树冠消耗）、极端严重程度（完全树冠消耗）。

在此，我们提供1989/90至2015/16年间国家公园土地权属范围内8个优先区域的历史严重程度制图，该制图基于陆地卫星（Landsat）影像。这覆盖了新南威尔士州国家公园和野生动物管理局（NPWS）管理的约30%的土地，涵盖多种植被类型。2016/17至当前火灾年度，这些区域被纳入基于哨兵2号（Sentinel 2）影像的全州FESM数据中。正在进行的FESM处理旨在在资源允许的情况下，通过分阶段发布实现追溯至1989/90年的全州覆盖。