Point Cloud Workshop
- Oslandia - for all additional information, support or question, please contact firstname.lastname@example.org
- Working environment
Things to do first
In order not to loose time, we will take some actions first. Open a terminal and run the following commands.
wget -O workshop.zip https://codeload.github.com/Oslandia/workshop-pointcloud/zip/master unzip workshop.zip sudo sh workshop-pointcloud-master/en/deps/install_deps.sh
Concepts and technologies
- LIDAR and point cloud
- Amount of data
- Technologies :
- pgpointcloud (schemas, pacths, types, ...)
- PDAL (pipeline, filter, writers, ...)
Use of libLAS tools (las2las, lasinfo, las2txt).
Use of the PDAL pipeline.
pgpointcloud and pgAdmin (Object Browsers and Query Tool).
- See the LIDAR data coverage through QGIS
- Database manager
- Simple queries to work with the point cloud (filtering, statistical data)
- Average, max and min computation
- Retrieve the altitude of the Puy-de-Dôme
- Convex and concave hull per altitude levels
We'll use data from CRAIG on Clermont Ferrand area as well as data coming from OpenStreetMap.
CRAIG provides a wide range of Open Data, as can be seen in the catalogue:
In particular, some LIDAR data are provided on several areas. These can be directly viewed online within your web browser:
And the FTP allows to download these data:
Moreover, some webservices are available and provided on the below web page:
Otherwise, we'll use WMS layers to display a base map within QGIS:
About OSM data, we'll use exported data provided by GeoFabrik, downloading and using data on the Auvergne area: