Bushfire Attack Level Toolbox

The Bushfire Attack Level Toolbox provides access to ArcGIS geoprocessing scripts that calculate the Bushfire Attack Level (BAL) as per Method 1 in AS3959-2009. BAL is a measure of the severity of a building's potential exposure to ember attack, radiant head and direct flame contact. It is defined in AS3959-2009 to serve as a basis for establishing the requirements for construction to improve protection of building elements from attack by bushfire. In the BAL Toolbox, the calculation method (as defined in AS3959-2009) is adapted to be applied spatially. Input information required are a digital elevation model and classified vegetation data. The BAL Toolbox allows users to calculate BAL for small regions, without the need for large computational resources or for executing code in command-line environments. This will provide stakeholders with the ability to efficiently generate rigorous and robust maps of Bushfire Attack Level that adhere to the national standard, compared to products generated by manual techniques.The BAL Toolbox code is written in Python, utilising the ArcGIS "arcpy" module to enable easy reading/writing of raster data and to provide methods for a graphical user interface in the standard ArcGIS tool style.The BAL Toolbox User Guide provides users an overview of the Toolbox, instructions on installation, any customisations execution and evaluation of results.林火侵袭等级工具箱（Bushfire Attack Level Toolbox）提供对ArcGIS地理处理脚本的访问权限，可依据AS3959-2009标准中的方法1计算林火侵袭等级（Bushfire Attack Level，BAL）。林火侵袭等级是衡量建筑物潜在遭受余烬侵袭、辐射热流及直接火焰接触风险严重程度的指标。AS3959-2009标准中对该指标作出定义，旨在为制定建筑施工要求提供依据，以提升建筑构件抵御林火侵袭的防护能力。在本工具箱中，AS3959-2009标准定义的计算方法被适配为可空间化应用。所需输入数据包括数字高程模型（digital elevation model）与分类植被数据。本工具箱支持用户针对小范围区域计算林火侵袭等级，无需依赖大型计算资源，也无需在命令行环境中运行代码。相较于手动制作的成果，该工具可帮助相关方高效生成符合国家标准、严谨可靠的林火侵袭等级地图。本工具箱的代码采用Python编写，通过调用ArcGIS的"arcpy"模块，可便捷实现栅格数据的读写，并支持以标准ArcGIS工具样式构建图形用户界面。《林火侵袭等级工具箱用户指南》将为用户提供工具箱概览、安装说明、自定义操作指南以及结果评估方法。