I am using R and the current 3x version of the lidR package to process point clouds. Sections of my point cloud are 'unclassified' and I need them to be classified as 'ground'. (These mis-classifications are happening at interstate overpasses.) I would like to manually assign these points their 'ground' classification value. If I were using a GIS, I would select the points using my road polygon and manually reassign their classification value. Is there a workflow in v3x of the lidR package to do this - to change a point's classification based on, in my case, a polygon shapefile?
In v1.6, there was a command called lasclassify that would allow me to create a user defined attribute in the point cloud and assign my own classifications (as in the lasclassify example shown here https://www.rdocumentation.org/packages/lidR/versions/1.6.1/topics/lasclassify). I think it has been long deprecated, though.
There is not much to see, but I provide my code below for anybody who is interested:
library(lidR) library(rgdal) mypath<- "c:/myPath/" tdat<- readLAS(file.path(myPath,"myLas.las")) shppath<- myPath shpname<- "myRoadPolygon" shape_spdf<- readOGR(dsn = shppath, layer = shpname) shppoly<- shape_spdf@polygons[]@Polygons[] ###here I would like to select the points in *tdat* by the polygon shapes in *shppoly*...