Urban forest – state 2019

The geodata layer ‘urban forest’ contains all clusters of publicly accessible green space with a minimum area of 60 ha. This geodata layer was obtained by selecting all ‘green areas’ based on the land use map (condition 2019). These green areas were clustered algorithmically on the basis of closeness, including physical barriers. Subsequently, only those green areas adjacent to a public road accessible on foot were preserved. On this basis, five grid layers (resolution 10x10m²) were drawn up, selecting clusters by function level on the basis of a minimum surface area: neighbouring green (> 0.2 ha); district green (> 10 ha); urban area green (> 30 ha); urban green (> 60 ha); urban forest (> 200 ha). Thus, the selected clusters with a higher function level are always a subset of the selected clusters of a lower function level. As a result of the method used, the vegetable type ‘urban forest’ consists not only of forest but of different types of green space. More information can be found in this background document: https://archief-algemeen.omgeving.vlaanderen.be/xmlui/bitstream/handle/acd/768624/Groentypo_2019.pdf the presence of green has a positive impact on a wide range of aspects that define a qualitative environment. This includes a positive impact on physical, mental and social health, but also biodiversity, climate resilience, landscape quality, etc. A common Flemish reference framework (introduced in MIRA-S 2000) to assess the availability of green space states that every inhabitant should have access to neighbourhood green at a maximum of 400 m, district green at a maximum of 800 m, urban part green at a maximum of 1 600 m, urban green at maximum m, urban green up to 3 200 m and urban forest up to 5 000 m. This data layer allows, among other things, to calculate the number of inhabitants in a given area that has access to urban forest, taking into account the above-mentioned maximum distance.‘城市森林’地理数据图层包含所有最小面积为60公顷的公共可进入绿地集群。该图层基于2019年土地利用图筛选所有‘绿地’生成，随后依据邻近性原则（包含物理阻隔因素）通过算法对这些绿地进行集群划分，仅保留毗邻步行可达公共道路的绿地。 基于上述成果，研究人员生成了5个分辨率为10×10平方米的栅格图层，按功能层级结合最小面积阈值筛选集群：邻里绿地（＞0.2公顷）、片区绿地（＞10公顷）、城区绿地（＞30公顷）、城市绿地（＞60公顷）、城市森林（＞200公顷）。由此可见，功能层级更高的筛选集群始终为功能层级更低的筛选集群的子集。 基于本方法生成的‘城市森林’绿地类型，不仅包含林地，还涵盖多种其他绿地类型。更多详细信息可参阅背景文档：https://archief-algemeen.omgeving.vlaanderen.be/xmlui/bitstream/handle/acd/768624/Groentypo_2019.pdf 绿地的存在对定义优质人居环境的诸多维度均具有积极影响，包括对生理、心理与社会健康的正向作用，同时亦有益于生物多样性、气候韧性与景观品质等领域。佛兰芒地区用于评估绿地可达性的通用参考框架（于MIRA-S 2000中提出）规定：每一位居民应最多在400米范围内可达邻里绿地、800米范围内可达片区绿地、1600米范围内可达城区绿地、最大[原文缺失数值]米范围内可达城市绿地、3200米范围内可达城市绿地、5000米范围内可达城市森林。 该数据图层可用于（除其他应用场景外）结合上述最大可达距离阈值，计算特定区域内可抵达城市森林的居民数量。