High-Resolution Multispectral Individual Tree Crown Annotations from Digital Orthophotos in Halle (Saale), Germany

Dataset description This dataset contains geospatial RGBI image tiles and per-tile polygon annotations for tree crown delineation in Halle, Germany. Raster tiles are provided as GeoTIFF files and annotations are provided as ESRI Shapefiles. Each raster tile has a ground sampling distance of 20 cm. With a tile size of 500 x 500 pixels, each tile covers 100 m x 100 m on the ground. Raster tiles are named tile_<x>_<y>.tif, and their corresponding label shapefiles use the same tile indices with a label_ prefix, i.e. label_tile_<x>_<y>.shp; for example, tile_8_18.tif maps to label_tile_8_18.shp. This convention is used in the DeepTrees tree segmentation software (https://deeptrees.de). Raster tiles Property Value Tile directory tiles/ Number of GeoTIFF tiles 241 Tile pixel size 500 x 500 px Ground sampling distance (GSD) 0.20 m Geospatial tile size 100 m x 100 m Raster bands 4 (RGBNIR) Raster data type uint8 Coordinate reference system EPSG:25832 Dataset bounding extent 704000, 5708000, 706000, 5710000 Bounding extent size 2000 m x 2000 m Time period 05-2022 Source: © GeoBasis-DE/LVermGeo ST 2022. Labels The label count is the sum of features across the per-tile label_tile_*.shp files. The three raster tiles without corresponding label shapefiles are tile_0_10.tif, tile_0_11.tif, and tile_1_19.tif, which can be used as background tiles or removed altogether. Property Value Label directory labels/ Per-tile label shapefiles 238 Raster tiles with corresponding label shapefiles 238 Raster tiles without corresponding label shapefiles 3 Total label polygons 10,464 Label geometry type Polygon Label attribute field class* Coordinate reference system EPSG:25832 *Class descriptions: 0: Tree 1: Cluster of trees 2: Unsure Consistency notes All raster tiles and per-tile label shapefiles use EPSG:25832. One label file, label_tile_8_4.shp, contains no polygon features. Some label polygons extend slightly beyond their corresponding 100 m x 100 m raster tile footprint. These cases still spatially intersect their matching raster tile and are consistent with tree crown polygons crossing tile boundaries.数据集说明 本数据集包含德国哈勒市用于树冠勾勒任务的地理空间RGBI图像瓦片及逐瓦片多边形标注。栅格瓦片以GeoTIFF(GeoTIFF)格式提供，标注数据以ESRI Shapefile(ESRI Shapefile)格式存储。单张栅格瓦片的地面采样距离(Ground sampling distance, GSD)为20厘米。瓦片像素尺寸为500×500像素，对应地面覆盖范围为100米×100米。 栅格瓦片命名格式为`tile_<x>_<y>.tif`，其对应的标注Shapefile文件使用相同的瓦片索引，仅前缀为`label_`，即`label_tile_<x>_<y>.shp`；例如`tile_8_18.tif`对应`label_tile_8_18.shp`。该命名约定被DeepTrees树冠分割软件（https://deeptrees.de）所采用。 #### 栅格瓦片参数 | 属性 | 数值 | | ---- | ---- | | 瓦片存储目录 | tiles/ | | GeoTIFF瓦片总数 | 241 | | 瓦片像素尺寸 | 500×500像素 | | 地面采样距离(Ground sampling distance, GSD) | 0.20米 | | 地理空间覆盖尺寸 | 100米×100米 | | 栅格波段数 | 4（RGBNIR） | | 栅格数据类型 | uint8 | | 坐标参考系统 | EPSG:25832 | | 数据集边界范围 | 704000, 5708000, 706000, 5710000 | | 边界范围尺寸 | 2000米×2000米 | | 采集时段 | 2022年5月 | | 数据来源 | © GeoBasis-DE/LVermGeo ST 2022. | 标注说明 标注总数为逐瓦片`label_tile_*.shp`文件中所有要素的总和。有3张栅格瓦片未配备对应的标注Shapefile，分别为`tile_0_10.tif`、`tile_0_11.tif`和`tile_1_19.tif`，此类瓦片可作为背景瓦片使用或直接移除。 #### 标注参数 | 属性 | 数值 | | ---- | ---- | | 标注存储目录 | labels/ | | 逐瓦片标注Shapefile数量 | 238 | | 配备对应标注的栅格瓦片数 | 238 | | 未配备对应标注的栅格瓦片数 | 3 | | 总标注多边形数 | 10464 | | 标注几何类型 | 多边形 | | 标注属性字段 | class* | | 坐标参考系统 | EPSG:25832 | *类别说明： 0: 树木 1: 树木集群 2: 无法确定 一致性说明 所有栅格瓦片及逐瓦片标注Shapefile均采用EPSG:25832坐标参考系统。存在1个标注文件`label_tile_8_4.shp`未包含任何多边形要素。 部分标注多边形会略微超出其对应的100米×100米栅格瓦片覆盖范围，此类情况仍与其匹配的栅格瓦片存在空间相交，符合树冠多边形跨越瓦片边界的实际场景。