# # blast2iso.py # # (c) 2013, martin isenburg - http://rapidlasso.com # rapidlasso GmbH - fast tools to catch reality # # uses blast2iso.exe to contour a folder of LiDAR files # # LiDAR input: LAS/LAZ/BIN/TXT/SHP/BIL/ASC/DTM # vector output: SHP/WKT/KML/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 blast2iso ...") ### 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 blast2iso executable blast2iso_path = lastools_path+"\\blast2iso.exe" ### check if executable exists if os.path.exists(lastools_path) == False: gp.AddMessage("Cannot find blast2iso.exe at " + blast2iso_path) sys.exit(1) else: gp.AddMessage("Found " + blast2iso_path + " ...") ### create the command string for blast2iso.exe command = ['"'+blast2iso_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 user-defined concavity if sys.argv[c] != "50": command.append("-concavity") command.append(sys.argv[c].replace(",",".")) c = c + 1 ### what should we contour if sys.argv[c] == "ground points only": command.append("-keep_class") command.append("2") command.append("-extra_pass") elif sys.argv[c] == "ground and keypoints": command.append("-keep_class") command.append("2") command.append("8") command.append("-extra_pass") elif sys.argv[c] == "ground and buildings": command.append("-keep_class") command.append("2") command.append("6") command.append("-extra_pass") elif sys.argv[c] == "ground and vegetation": command.append("-keep_class") command.append("2") command.append("3") command.append("4") command.append("5") command.append("-extra_pass") elif sys.argv[c] == "ground and objects": command.append("-keep_class") command.append("2") command.append("3") command.append("4") command.append("5") command.append("6") command.append("-extra_pass") c = c + 1 ### which isovalues should we extract if sys.argv[c] == "a number of x equally spaced contours": if sys.argv[c+1] != "10": command.append("-iso_number") command.append(sys.argv[c+1]) elif sys.argv[c] == "a contour every x elevation units": command.append("-iso_every") command.append(sys.argv[c+1].replace(",",".")) elif sys.argv[c] == "the contour with the iso-value x": command.append("-iso_value") command.append(sys.argv[c+1].replace(",",".")) c = c + 2 ### maybe we should smooth the TIN if sys.argv[c] != "do not smooth": command.append("-smooth") command.append(sys.argv[c]) c = c + 1 ### maybe we should simplify bumps if sys.argv[c] != "do not simplify": command.append("-simplify") command.append(sys.argv[c]) c = c + 1 ### maybe we should clean short lines if sys.argv[c] != "do not clean": command.append("-clean") command.append(sys.argv[c]) 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 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 blast2iso gp.AddMessage(str(output)) ### check return code if returncode != 0: gp.AddMessage("Error. blast2iso failed.") sys.exit(1) ### report happy end gp.AddMessage("Success. blast2iso done.")