Point Cloud Viewer Tutorial - ngageoint/voxel-globe GitHub Wiki
There are two way of viewing a point cloud
- Cesium Point Cloud Viewer which can only be used on georegistered point clouds (like the Providence data) and can only show up to 100,000 points before crashing the web browser. But the Cesium viewer has the advantage of displaying a satellite base map with the point cloud
- Potree Point Cloud Viewer which can display an unlimited number of points and has mensuration capabilities
Cesium Point Cloud Viewer
To view a point cloud, start by clicking the "Cesium Point Cloud Viewer" application link. Click the "Load a Voxel World" button.
images/cesium_point_cloud_load.png
Once the points have been loaded in the browser, you will see
You can click on a point to retrieve the latitude, longitude, and altitude of the point. If the point cloud was generated with LE/CE statistics, they will be displayed too.
Note: It is very easy to click between points and actually click a point in the background with Cesium
Potree Point Cloud Viewer
Similar to the Cesium viewer, start the "Potree Point Cloud Viewer" and load the voxel world.
Clicking the i icon in the lower right will allow you to select points to get further information.
Note: It is very difficult to click a desired point due to a bug in Potree which always selects the last point along array, almost guaranteeing you select a background point. The best way around this is to rotate the world so that the background is void of extra points.