LIDAR Composite Digital Surface Model (DSM) - 1m

The LIDAR Composite DSM (Digital Surface Model) is a raster elevation model covering ~99% of England at 1m spatial resolution. The DSM (Digital Surface Model) is produced from the last or only laser pulse returned to the sensor and includes heights of objects, such as vehicles, buildings and vegetation, as well as the terrain surface

Produced by the Environment Agency in 2022, the DSM is derived from a combination of our Time Stamped archive and National LIDAR Programme surveys, which have been merged and re-sampled to give the best possible coverage. Where repeat surveys have been undertaken the newest, best resolution data is used. Where data was resampled a bilinear interpolation was used before being merged.

The 2022 LIDAR Composite contains surveys undertaken between 6th June 2000 and 2nd April 2022. Please refer to the metadata index catalogue which show for any location which survey was used in the production of the LIDAR composite.

The data is available to download as GeoTiff rasters in 5km tiles aligned to the OS National grid. The data is presented in metres, referenced to Ordinance Survey Newlyn and using the OSTN’15 transformation method. All individual LIDAR surveys going into the production of the composite had a vertical accuracy of +/-15cm RMSE. Attribution statement: © Environment Agency copyright and/or database right 2022. All rights reserved.

该激光雷达复合数字地表模型（LIDAR Composite DSM）为栅格高程模型，覆盖英格兰约99%，空间分辨率为1米。数字地表模型（Digital Surface Model）由返回至传感器的最后或唯一激光脉冲生成，包括诸如车辆、建筑物和植被等物体的高度，以及地形表面高度。

该模型由环境署于2022年制作，通过结合我们的时间戳存档和国家级激光雷达计划调查数据生成，经过合并和重新采样以实现最佳覆盖范围。在重复调查的情况下，使用最新、最高分辨率的データ。在数据重新采样后，合并之前采用双线性插值法。

2022年激光雷达复合模型包含了2000年6月6日至2022年4月2日之间进行的调查。请参考元数据索引目录，以了解任何位置所使用的激光雷达复合模型中的调查。

数据可作为GeoTiff栅格图像下载，分为5公里大小的瓦片，与OS国家网格对齐。数据以米为单位呈现，参照新林测量局（Ordinance Survey Newlyn），并使用OSTN’15转换方法。所有用于复合模型制作的单个激光雷达调查都具有±15厘米均方根误差（RMSE）的垂直精度。归属声明：© 环境署版权和/或数据库权利2022。版权所有。