LidarHD Data Processing Tool

This Python script automates the downloading of LidarHD data from IGN based on a user-provided shapefile and optionally rasterize this data.

If you're working with R, a similar package exists : https://forgemia.inra.fr/lidar/lidarHD

Prerequisites

Before running this script, ensure you have Conda installed on your system. Also, be sure to download and unzip the LidarHD tiles in data.zip next to download_LidarHD.py

You can install the necessary Python packages using the following Conda commands:

conda create --name lidar_processing python=3.8
conda activate lidar_processing
conda install geopandas requests tqdm
conda install -c conda-forge pdal python-pdal gdal

Installation

Clone this repository or download the script to your local machine:

git clone https://github.com/r-wenger/LidarHD-Download.git

Navigate to the script directory:

cd path/to/your/script

Usage

Run the script using the following command:

python process_lidar.py -input path/to/your/shapefile.shp -output path/to/output/directory -verbose 1 -to_dtm 1 --classes 2 3 4 5 --res 0.5

Command Line Arguments

• -input: Specifies the path to the user's shapefile.
• -output: Specifies the directory where the Lidar files and any generated raster files will be stored.
• -verbose: Enables verbose mode; 1 for detailed logs, 0 for minimal output.
• -to_dtm: Indicates whether to process the downloaded Lidar data into a raster; 1 for yes, 0 for no.
• --classes: Specifies Lidar classes to include. Use a space-separated list of class numbers, or 'ALL' for all classes.
• --res: Sets the resolution for the output raster files.

Features

• Downloads LidarHD data from IGN using specified geographic boundaries from a shapefile.
• Optionally converts point cloud data to raster using PDAL.
• Flexible class filtering with support for specific classes or all classes.

Support

For issues and questions, please contact [romain.wenger@live-cnrs.unistra.fr].