# # blast2dem.py # # (c) 2013, martin isenburg - http://rapidlasso.com # rapidlasso GmbH - fast tools to catch reality # # uses blast2dem.exe to raster a LiDAR file # # 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 blast2dem ...") ### 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 blast2dem executable blast2dem_path = lastools_path+"\\blast2dem.exe" ### check if executable exists if os.path.exists(lastools_path) == False: gp.AddMessage("Cannot find blast2dem.exe at " + blast2dem_path) sys.exit(1) else: gp.AddMessage("Found " + blast2dem_path + " ...") ### create the command string for blast2dem.exe command = ['"'+blast2dem_path+'"'] ### maybe use '-verbose' option if sys.argv[argc-1] == "true": command.append("-v") ### add input LiDAR command.append("-i") command.append('"'+sys.argv[1]+'"') ### maybe use a user-defined step size if sys.argv[2] != "1": command.append("-step") command.append(sys.argv[2].replace(",",".")) ### maybe use a user-defined kill if sys.argv[3] != "100": command.append("-kill") command.append(sys.argv[3].replace(",",".")) ### what should we raster if sys.argv[4] == "intensity": command.append("-intensity") ### what should we output if sys.argv[5] == "hillshade": command.append("-hillshade") elif sys.argv[5] == "gray ramp": command.append("-gray") ### do we have special lighting for hillshade if sys.argv[5] == "hillshade": if (sys.argv[6] != "north east") or (sys.argv[7] != "1 pm"): command.append("-light") if sys.argv[6] == "north": command.append("0") command.append("1.41421") elif sys.argv[6] == "south": command.append("0") command.append("-1.41421") elif sys.argv[6] == "east": command.append("1.41421") command.append("0") elif sys.argv[6] == "west": command.append("-1.41421") command.append("0") elif sys.argv[6] == "north east": command.append("1") command.append("1") elif sys.argv[6] == "south east": command.append("1") command.append("-1") elif sys.argv[6] == "north west": command.append("-1") command.append("1") else: ### if sys.argv[6] == "south west" command.append("-1") command.append("-1") if sys.argv[7] == "noon": command.append("100") elif sys.argv[7] == "1 pm": command.append("2") elif sys.argv[7] == "3 pm": command.append("1") elif sys.argv[7] == "6 pm": command.append("0.5") else: ### if sys.argv[7] == "9 pm" command.append("0.1") ### do we have a min max value for colors if (sys.argv[7] == "gray ramp"): if (sys.argv[8] != "#") and (sys.argv[9] != "#"): command.append("-set_min_max") command.append(sys.argv[8].replace(",",".")) command.append(sys.argv[9].replace(",",".")) ### what should we triangulate if sys.argv[10] == "ground points only": command.append("-keep_class") command.append("2") elif sys.argv[10] == "ground and keypoints": command.append("-keep_class") command.append("2") command.append("8") elif sys.argv[10] == "ground and buildings": command.append("-keep_class") command.append("2") command.append("6") elif sys.argv[10] == "ground and vegetation": command.append("-keep_class") command.append("2") command.append("3") command.append("4") command.append("5") elif sys.argv[10] == "ground and objects": command.append("-keep_class") command.append("2") command.append("3") command.append("4") command.append("5") command.append("6") elif sys.argv[10] == "last return only": command.append("-last_only") elif sys.argv[10] == "first return only": command.append("-first_only") ### should we use the tile bounding box if sys.argv[11] == "true": command.append("-use_tile_bb") ### this is where the output arguments start out = 12 ### maybe an output format was selected if sys.argv[out] != "#": command.append("-o" + sys.argv[out]) ### maybe an output file name was selected if sys.argv[out+1] != "#": command.append("-o") command.append('"'+sys.argv[out+1]+'"') ### maybe an output directory was selected if sys.argv[out+2] != "#": command.append("-odir") command.append('"'+sys.argv[out+2]+'"') ### maybe an output appendix was selected if sys.argv[out+3] != "#": command.append("-odix") command.append('"'+sys.argv[out+3]+'"') ### maybe there are additional command-line options if sys.argv[out+4] != "#": additional_options = sys.argv[out+4].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 blast2dem gp.AddMessage(str(output)) ### check return code if returncode != 0: gp.AddMessage("Error. blast2dem failed.") sys.exit(1) ### report happy end gp.AddMessage("Success. blast2dem done.")