11/29/2023 0 Comments Minecraft university map downloadTo do this, we're using an algorithm that averages the height of points within a one meter cell. The lidR package will automatically stitch them together! Finally we come to the very CPU intensive part of the code: converting our point clouds to a raster. Then we gave lidR permission to use all our CPU power (fun). First we installed and loaded the libraries we needed (easy). Let's go through what we did in that code. WriteRaster(dtm, "dtm_ground.tif", type="INT2U") #this converts the point cloud to a raster layerÄtm<- grid_terrain(lasfilterground(las), res=1, knnidw(k = 5, p = 2)) #this reads and stores the lidar data! fun!! Lidar_files<- list.files('lidar/rabun', full.names = TRUE) laz files in your folder so they can be read #this will allow lidR to use as many threads as possible when computing later Now all you have to do is run this script (replacing the placeholder folder name on line 5 with whatever folder holds your files): #these lines install and load the necessary packages laz files in a folder in that same file location. Open up a new script, and set the working directory to your source file location (Session > Set Working Directory > To Source File Location). If you need to install R, I recommend following this simple guide to set up and use R with RStudio. If you don't know anything about coding with R, don't worry! We'll be doing all of this with only 8 lines of code. To do this, we'll be using some very convenient functions provided by the 'lidR' library, an R package for lidar data imaging and manipulation. Just like a raster image, we'll be storing our data in gridded cells, although the information we'll be putting in those cells won't describe the color, but rather the height of the cell. That format is referred to as a 'raster.' You may know this word in relation to computer graphics a raster image is one which stores its color data in gridded cells. But since these points are irregularly dispersed, we'll have to put them into a gridded format that can be easily converted into Minecraft blocks. It can be useful to think of these points as vertices on a 3D object, which represents the actual object the lidar is. A lidar point cloud is a collection of three dimensional points. Lidar, a portmanteau of "light" and "radar," is a technology that measures distances by shooting lasers.
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