# # lasclassifyPro.py # # (c) 2013, martin isenburg - http://rapidlasso.com # rapidlasso GmbH - fast tools to catch reality # # uses lasclassify.exe to classify the LiDAR points # for a folder of files in building points (class 6) # and high vegetation (class 5) points # # requires that height above ground is stored in the # user data field of each input point which can be # done with lasheight or (licensed) lasground # # LiDAR input: LAS/LAZ/BIN/TXT/SHP/BIL/ASC/DTM # LiDAR output: LAS/LAZ/BIN/TXT # # for licensing see http://lastools.org/LICENSE.txt # import sys, os, arcgisscripting, subprocess def check_output(command,console): if console == True: process = subprocess.Popen(command) else: process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True) output,error = process.communicate() returncode = process.poll() return returncode,output ### create the geoprocessor object gp = arcgisscripting.create(9.3) ### report that something is happening gp.AddMessage("Starting lasclassify production ...") ### get number of arguments argc = len(sys.argv) ### report arguments (for debug) #gp.AddMessage("Arguments:") #for i in range(0, argc): # gp.AddMessage("[" + str(i) + "]" + sys.argv[i]) ### get the path to LAStools lastools_path = os.path.dirname(os.path.dirname(os.path.dirname(sys.argv[0]))) ### make sure the path does not contain spaces if lastools_path.count(" ") > 0: gp.AddMessage("Error. Path to .\\lastools installation contains spaces.") gp.AddMessage("This does not work: " + lastools_path) gp.AddMessage("This would work: C:\\software\\lastools") sys.exit(1) ### complete the path to where the LAStools executables are lastools_path = lastools_path + "\\bin" ### check if path exists if os.path.exists(lastools_path) == False: gp.AddMessage("Cannot find .\\lastools\\bin at " + lastools_path) sys.exit(1) else: gp.AddMessage("Found " + lastools_path + " ...") ### create the full path to the lasclassify executable lasclassify_path = lastools_path+"\\lasclassify.exe" ### check if executable exists if os.path.exists(lastools_path) == False: gp.AddMessage("Cannot find lasclassify.exe at " + lasclassify_path) sys.exit(1) else: gp.AddMessage("Found " + lasclassify_path + " ...") ### create the command string for lasclassify.exe command = ['"'+lasclassify_path+'"'] ### maybe use '-verbose' option if sys.argv[argc-1] == "true": command.append("-v") ### counting up the arguments c = 1 ### add input LiDAR wildcards = sys.argv[c+1].split() for wildcard in wildcards: command.append("-i") command.append('"' + sys.argv[c] + "\\" + wildcard + '"') c = c + 2 ### maybe the units are in feet if sys.argv[c] == "true": command.append("-feet") c = c + 1 ### maybe the elevation is in feet if sys.argv[c] == "true": command.append("-elevation_feet") c = c + 1 ### maybe user-defined planarity if sys.argv[c].replace(",",".") != "0.1": command.append("-planar") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### maybe user-defined planarity if sys.argv[c].replace(",",".") != "0.4": command.append("-rugged") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### maybe user-defined planarity if sys.argv[c] != "2": command.append("-ground_offset") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### maybe no gutters if sys.argv[c] == "false": command.append("-no_gutters") ### else maybe wide gutters elif sys.argv[c+1] == "true": command.append("-wide_gutters") c = c + 2 ### maybe also tiny buildings if sys.argv[c] == "false": command.append("-small_buildings") c = c + 1 ### maybe keep tree overhang if sys.argv[c] == "false": command.append("-keep_overhang") c = c + 1 ### maybe an output format was selected if sys.argv[c] != "#": if sys.argv[c] == "las": command.append("-olas") elif sys.argv[c] == "laz": command.append("-olaz") elif sys.argv[c] == "bin": command.append("-obin") elif sys.argv[c] == "xyz": command.append("-otxt") elif sys.argv[c] == "xyzi": command.append("-otxt") command.append("-oparse") command.append("xyzi") elif sys.argv[c] == "txyzi": command.append("-otxt") command.append("-oparse") command.append("txyzi") c = c + 1 ### maybe an output directory was selected if sys.argv[c] != "#": command.append("-odir") command.append('"' + sys.argv[c] + '"') c = c + 1 ### maybe an output appendix was selected if sys.argv[c] != "#": command.append("-odix") command.append('"' + sys.argv[c] + '"') c = c + 1 ### maybe we should run on multiple cores if sys.argv[c] != "1": command.append("-cores") command.append(sys.argv[c]) c = c + 1 ### maybe there are additional input options if sys.argv[c] != "#": additional_options = sys.argv[c].split() for option in additional_options: command.append(option) ### report command string gp.AddMessage("LAStools command line:") command_length = len(command) command_string = str(command[0]) command[0] = command[0].strip('"') for i in range(1, command_length): command_string = command_string + " " + str(command[i]) command[i] = command[i].strip('"') gp.AddMessage(command_string) ### run command returncode,output = check_output(command, False) ### report output of lasclassify gp.AddMessage(str(output)) ### check return code if returncode != 0: gp.AddMessage("Error. lasclassify failed.") sys.exit(1) ### report happy end gp.AddMessage("Success. lasclassify done.")