Australian native forest commerciality

The Australian Sawlog Commerciality Database is the first spatial database of potential sawlog merchantability and productivity for Australia's native forests. It shows native forests capable of producing sawlogs commercially in Australia. This report describes how the database was developed and validated. \r\n\r\n Commerciality is the expected volume yield of commercial sawlog that is available from a forest stand over the long term, assuming good silvicultural practices are followed. Commerciality is derived from a combination of the merchantability and productivity of forest stands. Merchantability is a forest stand attribute based on tree species composition and stand structure, and in this work refers to a forest stand's suitability for commercial production of sawlogs or other high-quality products. Productivity is also a forest stand attribute, and describes the potential yield of sawlogs from a forest stand. \r\n\r\n To create the spatial database, ABARES obtained measures of sawlog merchantability and productivity from datasets in the National Forest Inventory (NFI) and combined these into attributes useful for mapping forest commerciality on a national scale. The database incorporates forest yield associations, which are groupings of forest types that display similar commerciality attributes. ABARES developed the national database using Regional Forest Agreement datasets, FORWOOD and Resource Assessment Commission data and estimates of productivity, and information provided directly to the NFI or published by state and territory agencies. Multiple-use public forest, leasehold forest and private forest are the main tenures reported because forests on these tenures are generally available for sawlog harvesting. \r\n\r\n The Australian Sawlog Commerciality Database contains data of varying age and the level of confidence for the data input depends on the age of that data. Access to the data is restricted because it contains some commercial-in-confidence information.澳大利亚商用锯材数据库（Australian Sawlog Commerciality Database）是首个针对澳大利亚原生林的潜在锯材商用性与生产力的空间数据库，收录了澳大利亚境内具备商业性锯材生产能力的原生林。本报告详述了该数据库的构建与验证流程。 商用性指的是在遵循良好营林实践的前提下，某一林分长期可获得的商用锯材预期蓄积量。商用性由林分的可商用性与生产力共同推导得出。可商用性是基于树木物种组成与林分结构的林分属性，在本研究中特指林分是否适用于商用锯材或其他高品质产品的生产。生产力同样属于林分属性，用于描述林分的潜在锯材产出量。 为构建该空间数据库，澳大利亚农业与资源经济科学局（ABARES）从国家森林清查（National Forest Inventory, NFI）的数据集获取了锯材可商用性与生产力的相关指标，并将其整合为可用于全国范围森林商用性制图的属性字段。该数据库纳入了森林产出关联分组，即具备相似商用性属性的森林类型集合。ABARES依托区域森林协定数据集、FORWOOD与资源评估委员会（Resource Assessment Commission）数据、生产力估算结果，以及直接提交至国家森林清查或由州和领地机构发布的信息，开发了这款国家级数据库。本次收录的主要林权类型包括多用途公有林、租赁林与私有林，因为这些林权下的森林通常可用于锯材采伐。 澳大利亚商用锯材数据库包含不同时效的数据，数据输入的置信度水平取决于对应数据的年代。由于数据库包含部分商业敏感信息，其数据访问受到限制。