遇见数据集

Land resource map — AR50 — forest bondity

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data.europa2024-06-27 收录
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Map layers in the nationwide data set AR50 that show production capacity/bonity in forest area by scale 1:50 000 and are adapted to use on scales from 1:20 000 to 1:100 000. Forest yield is a measure of the area’s ability to produce wood. Property in the data set to be used to produce the map layer is called ARSKOGBON in SOSI format and forest bondity in gml and gdb format. AR50 is produced by generalisation of FKB-AR5 below the tree limit and interpretation of satellite images above the tree line. In addition, N50 forests have been used without registered wood species where there is no AR5. Shapes smaller than 15 acres do not appear on the map, but are merged with adjacent areas. The dataset is thus not suitable for compiling land use statistics. Legal property values according to the code list are: 18 — High and very high; 13 — Medium; 12 — Low; 11 — Impediment; 98 — Not applicable. The data set has been updated once every three years with the last year’s version of FKB-AR5 (area resource map on a scale of 1:5000 in the database as of 31.12). The latest update has data from 31.12.2019. The first version of the AR50 data set (year version 2010) was produced by AR5 and N50 as of 31.12.2010, as well as AR-FJELL with satellite images (IMAGE2000) from the period 1994 and 2006. Annual version 2013 (AR5 and N50 as of 31 December 2013) and annual version 2016 (AR5 and N50 as of 31.12.2016). AR-FJELL has not been updated since 2010. The second version of the AR50 data set (year version 2020) was produced by AR5 and N50 as of 31.12.2021, as well as AR-FJELL2 with sentinel-2 images from the period 20XX-20XX. The production trail has been rewritten with new code. The codework is adjusted to changes in the input data sets. The generalised figures will therefore differ slightly from previous versions. In addition, there is topological correction including smoothing of the figures. Data is downloaded as county or municipal files. There is no need to download the data set more than once to produce all the map layers in the dataset.

全国性数据集AR50包含多幅地图图层,以1:50 000比例尺呈现林区的生产能力/立地质量,可适配1:20 000至1:100 000比例尺的使用需求。森林生产力(forest yield)是衡量区域木材生产能力的核心指标。该数据集用于生成上述地图图层的属性字段,在SOSI格式中命名为ARSKOGBON,在GML与GDB格式中则标注为森林立地质量(forest bondity)。 AR50的制作方式为:对林木线以下的FKB-AR5数据进行制图综合,对林木线以上的区域则通过卫星影像解译完成。此外,在无AR5数据覆盖的区域,将采用未登记木材树种信息的N50森林数据。面积小于15英亩的图斑不会在地图中显示,而是会与相邻区域进行合并处理,因此该数据集不适用于编制土地利用统计数据。 该数据集的法定属性值对应代码表如下:18 — 高及极高;13 — 中等;12 — 低;11 — 受限;98 — 不适用。 本数据集每三年更新一次,更新数据源为截至对应年份12月31日的FKB-AR5数据(即数据库中1:5000比例尺区域资源图,统计截至31.12)。最新一次更新的数据截止至2019年12月31日。 AR50数据集的首个版本(2010年度版)基于截至2010年12月31日的AR5与N50数据,以及搭载1994年至2006年时段影像(IMAGE2000)的AR-FJELL数据制作完成。2013年度版(数据源为截至2013年12月31日的AR5与N50数据)与2016年度版(数据源为截至2016年12月31日的AR5与N50数据)均沿用该制作流程。AR-FJELL自2010年起未再进行更新。 AR50数据集的第二个版本(2020年度版)基于截至2021年12月31日的AR5与N50数据,以及搭载20XX-20XX时段哨兵-2(Sentinel-2)影像的AR-FJELL2数据制作完成。本次更新重写了全流程生产代码,并针对输入数据集的变更调整了代码逻辑,因此制图综合后的图斑数值与此前版本存在细微差异。此外,本次更新还新增了拓扑校正处理,包括图斑形状平滑优化。 数据支持按县级或市级文件进行下载,仅需下载一次即可获取该数据集内的全部地图图层。

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