Variable name,Definition and/or commentary
1.       Terrian products,
Pixel value,Elevation in meters.
2.       Tree canopy products,
2.1 CHM ,
Pixel value,Tree overstory height above the underlying ground topography in meters.
2.2 Treetop location,
U_ID,Unique ID for each treetop
Z,Treetop height above the underlying ground topography in meters.
3.       Building 3D model products,
3.1 Building footprints,
U_ID,Unique ID of each polygon/footprint
MIN,The lowest rooftop height above the ground of the building.
MAX,The highest rooftop height above the ground of the building.
RANGE,The difference between the MAX and MIN values.
MEAN,The average of the rooftop height above the ground of the building.
MEDIAN,The median of the rooftop height above the ground of the building.
STD,The standard deviation of BHM of the corresponding footprint.
SUM,The sum value of BHM of the corresponding footprint.
PCT90,The 90th percentile of BHM of the corresponding footprint.
Ground_Z,The lowest absolute elevation of the building base.
Shape_Area,The area of the building footprint in square meters.
Shape_Length,The perimeter of the building footprint in meters.
tile_name,The tile name of the 5 km grid.
3.2 Mesh in OBJ format,Unique ID is used as file name.
3.3 Mesh in Shapefile format,
3.3.1 LOD1,
File Name,File name of each polygon/footprint
U_ID,Unique ID of each polygon/footprint to the corresponding model.
Building_Height,"Building height, sourced from the average of the rooftop height above the ground of the building (MEAN)"
Footprint_Area,The area of the building footprint in square meters.
Ground_Z,"The ground Z value of the footprint, sourced from the lowest z value within the footprint."
3.3.2 LOD2,
File Name,File name of of each polygon/footprint
3.3.3 pc2mesh_rmse_37969.csv,A table of RMSE of Euclidean distances between each point in the point cloud to the reconstructed model.
U_ID,Unique ID of each polygon/footprint to the corresponding model.
Shape_Area,The area of the building footprint in square meters.
Ground_Z,The lowest absolute elevation of the building base.
tile_name,The tile name of the 5 km grid.
obj_z_min,The minimum z value of the lod2 mesh.
obj_z_max,The maximize z value of the lod2 mesh.
pt_num,Number of points in the point cloud.
ply_z_min,The minimum z value of the point cloud.
ply_z_max,The maximize z value of the point cloud.
z_dif,(ply_z_max - ply_z_min) - (obj_z_max - obj_z_min)
z_min_dif,ply_z_min - obj_z_min
z_max_dif,ply_z_max - obj_z_max
rmse_m2pc,The RMSE from each vertex in the mesh to its nearest neighbour in the point cloud.
rmse_pc2m,The RMSE from each point in the point cloud to its nearest face in the mesh.
pt_density,Point density: pt_num/ Shape_Area
remark,Notes of problematic lod2 models.