Australian Land Disturbance Database (ALDD) - Remoteness from Access

The Australian Land Disturbance Database is an environmental database and a set of modelling procedures which are designed to assist in the planning and management of remote and natural lands in Australia. ALDD survey work is implemented by measuring variation in disturbance across the landscape using four 'indicators': Remoteness from Settlement, Remoteness from Access, Apparent Naturalness and Biophysical Naturalness. \n\nThe distance indicators are derived by weighting primary data (eg roads for access, infrastructure for Apparent naturalness) according to its impact relative to the highest level of impact for this feature type. Then the distance from this 'major impact equivalent' was calculated and thresholds applied.\nBiophysical Naturalness is derived using two methodologies, depending on the nature of land system. For Non-arid, or intensive landuse zone, BN is calculated using grazing, logging and similar available primary data. For arid and semi-arid rangelands, the distance from water, expected domestic stock and palatability of vegetation, form the basis of the assessment.Departmental Deed\nUnrestricted.\nNB. None of the primary data is available for distribution.\nData use agreement must be completed.

澳大利亚土地扰动数据库（Australian Land Disturbance Database，ALDD）是一款环境类数据库，同时配套一套标准化建模流程，旨在为澳大利亚偏远与自然土地的规划及管理工作提供支撑。

ALDD的调研工作通过四类“扰动指标”对全域景观的扰动程度变化开展量化测算：距定居点的偏远程度、距通行通路的偏远程度、表观自然度与生物物理自然度。

上述指标的生成逻辑为：依据原始数据（例如用于通行性评估的道路数据、用于表观自然度测算的基础设施数据）相对于该特征类型最高影响水平的影响权重进行加权运算，随后计算该“主要影响当量”的距离并应用阈值规则。

生物物理自然度的测算需根据土地系统的属性采用两类差异化方法：针对非干旱区或土地利用集约区域，生物物理自然度通过放牧、伐木及其他可获取的原始数据进行计算；针对干旱与半干旱牧场区域，评估的核心依据为距水源的距离、预期家养牲畜分布情况以及植被适口性。

部门协议：无使用限制。
备注：所有原始数据均不得对外分发。
使用本数据集前需完成数据使用协议的签署。