# # lasoverlap.py # # (c) 2013, martin isenburg - http://rapidlasso.com # rapidlasso GmbH - fast tools to catch reality # # uses lasoverlap.exe to check the flightline overlap # and alignment for a folder of LiDAR files # # LiDAR input: LAS/LAZ/BIN/TXT/SHP/BIL/ASC/DTM # raster output: BIL/ASC/IMG/TIF/DTM/PNG/JPG # # 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 lasoverlap ...") ### 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 lasoverlap executable lasoverlap_path = lastools_path+"\\lasoverlap.exe" ### check if executable exists if os.path.exists(lastools_path) == False: gp.AddMessage("Cannot find lasoverlap.exe at " + lasoverlap_path) sys.exit(1) else: gp.AddMessage("Found " + lasoverlap_path + " ...") ### create the command string for lasoverlap.exe command = ['"'+lasoverlap_path+'"'] ### maybe use '-verbose' option if sys.argv[argc-1] == "true": command.append("-v") ### counting up the arguments c = 1 ### add input LiDAR command.append("-i") command.append('"' + sys.argv[c] + '"') c = c + 1 ### maybe use a user-defined step size if sys.argv[c] != "2": command.append("-step") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### what should we raster if sys.argv[c] != "elevation": command.append("-" + sys.argv[c]) c = c + 1 ### what operation should we use if sys.argv[c] != "lowest": command.append("-" + sys.argv[c]) c = c + 1 ### should we fill a few pixels if sys.argv[c] != "0": command.append("-fill") command.append(sys.argv[c]) c = c + 1 ### what should we output if sys.argv[c] == "actual values": command.append("-values") c = c + 1 ### maybe no overlap raster if sys.argv[c] != "true": command.append("-no_over") c = c + 1 ### maybe use a user-defined max diff if sys.argv[c] != "5": command.append("-max_over") command.append(sys.argv[c]) c = c + 1 ### maybe no difference raster if sys.argv[c] != "true": command.append("-no_diff") c = c + 1 ### maybe use a user-defined max diff if sys.argv[c].replace(",",".") != "0.5": command.append("-max_diff") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### what should we triangulate if sys.argv[c] == "ground points only": command.append("-keep_class") command.append("2") elif sys.argv[c] == "ground and keypoints": command.append("-keep_class") command.append("2") command.append("8") elif sys.argv[c] == "ground and buildings": command.append("-keep_class") command.append("2") command.append("6") elif sys.argv[c] == "last return only": command.append("-last_only") elif sys.argv[c] == "first return only": command.append("-first_only") c = c + 1 ### should we use the bounding box if sys.argv[c] == "true": command.append("-use_bb") c = c + 1 ### should we use the tile bounding box if sys.argv[c] == "true": command.append("-use_tile_bb") c = c + 1 ### maybe an output format was selected if sys.argv[c] != "#": command.append("-o" + sys.argv[c]) c = c + 1 ### maybe an output file name was selected if sys.argv[c] != "#": command.append("-o") command.append('"'+sys.argv[c]+'"') 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 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 lasoverlap gp.AddMessage(str(output)) ### check return code if returncode != 0: gp.AddMessage("Error. lasoverlap failed.") sys.exit(1) ### report happy end gp.AddMessage("Success. lasoverlap done.")