Filter points based on their coordinates. -keep_tile 631000 4834000 1000 (ll_x ll_y size) -keep_circle 630250.00 4834750.00 100 (x y radius) -keep_xy 630000 4834000 631000 4836000 (min_x min_y max_x max_y) -drop_xy 630000 4834000 631000 4836000 (min_x min_y max_x max_y) -keep_x 631500.50 631501.00 (min_x max_x) -drop_x 631500.50 631501.00 (min_x max_x) -drop_x_below 630000.50 (min_x) -drop_x_above 630500.50 (max_x) -keep_y 4834500.25 4834550.25 (min_y max_y) -drop_y 4834500.25 4834550.25 (min_y max_y) -drop_y_below 4834500.25 (min_y) -drop_y_above 4836000.75 (max_y) -keep_z 11.125 130.725 (min_z max_z) -drop_z 11.125 130.725 (min_z max_z) -drop_z_below 11.125 (min_z) -drop_z_above 130.725 (max_z) -keep_xyz 620000 4830000 100 621000 4831000 200 (min_x min_y min_z max_x max_y max_z) -drop_xyz 620000 4830000 100 621000 4831000 200 (min_x min_y min_z max_x max_y max_z) Filter points based on their return number. -first_only -keep_first -drop_first -last_only -keep_last -drop_last -keep_middle -drop_middle -keep_return 1 2 3 -drop_return 3 4 -keep_single -drop_single -keep_double -drop_double -keep_triple -drop_triple -keep_quadruple -drop_quadruple -keep_quintuple -drop_quintuple Filter points based on the scanline flags. -drop_scan_direction 0 -scan_direction_change_only -edge_of_flight_line_only Filter points based on their intensity. -keep_intensity 20 380 -drop_intensity_below 20 -drop_intensity_above 380 -drop_intensity_between 4000 5000 Filter points based on their classification. -keep_class 1 3 7 -drop_class 4 2 -drop_synthetic -keep_synthetic -drop_keypoint -keep_keypoint -drop_withheld -keep_withheld Filter points based on their user data. -keep_user_data 1 -drop_user_data 255 -keep_user_data_between 10 20 -drop_user_data_below 1 -drop_user_data_above 100 -drop_user_data_between 10 40 Filter points based on their point source ID. -keep_point_source 3 -keep_point_source_between 2 6 -drop_point_source 27 -drop_point_source_below 6 -drop_point_source_above 15 -drop_point_source_between 17 21 Filter points based on their scan angle. -keep_scan_angle -15 15 -drop_abs_scan_angle_above 15 -drop_scan_angle_below -15 -drop_scan_angle_above 15 -drop_scan_angle_between -25 -23 Filter points based on their gps time. -keep_gps_time 11.125 130.725 -drop_gps_time_below 11.125 -drop_gps_time_above 130.725 -drop_gps_time_between 22.0 48.0 Filter points based on their wavepacket. -keep_wavepacket 0 -drop_wavepacket 3 Filter points with simple thinning. -keep_every_nth 2 -keep_random_fraction 0.1 -thin_with_grid 1.0 -thin_with_time 0.001 Transform coordinates. -translate_x -2.5 -scale_z 0.3048 -rotate_xy 15.0 620000 4100000 (angle + origin) -translate_xyz 0.5 0.5 0 -translate_then_scale_y -0.5 1.001 -switch_x_y -switch_x_z -switch_y_z -clamp_z_below 70.5 -clamp_z 70.5 72.5 Transform raw xyz integers. -translate_raw_z 20 -translate_raw_xyz 1 1 0 -clamp_raw_z 500 800 Transform intensity. -scale_intensity 2.5 -translate_intensity 50 -translate_then_scale_intensity 0.5 3.1 -clamp_intensity 0 255 -clamp_intensity_above 255 Transform scan_angle. -scale_scan_angle 1.944445 -translate_scan_angle -5 -translate_then_scale_scan_angle -0.5 2.1 Change the return number or return count of points. -repair_zero_returns -set_return_number 1 -change_return_number_from_to 2 1 -set_number_of_returns 2 -change_number_of_returns_from_to 0 2 Modify the classification. -set_classification 2 -change_classification_from_to 2 4 -classify_z_below_as -5.0 7 -classify_z_above_as 70.0 7 -classify_z_between_as 2.0 5.0 4 -classify_intensity_above_as 200 9 -classify_intensity_below_as 30 11 Change the flags. -set_withheld_flag 0 -set_synthetic_flag 1 -set_keypoint_flag 0 Modify the user data. -set_user_data 0 -change_user_data_from_to 23 26 Modify the point source ID. -set_point_source 500 -change_point_source_from_to 1023 1024 -quantize_Z_into_point_source 200 Transform gps_time. -translate_gps_time 40.50 -adjusted_to_week -week_to_adjusted 1671 Transform RGB colors. -scale_rgb_down (by 256) -scale_rgb_up (by 256) Supported LAS Inputs -i lidar.las -i lidar.laz -i lidar1.las lidar2.las lidar3.las -merged -i *.las - merged -i flight0??.laz flight1??.laz -i terrasolid.bin -i esri.shp -i nasa.qi -i lidar.txt -iparse xyzti -iskip 2 (on-the-fly from ASCII) -i lidar.txt -iparse xyzi -itranslate_intensity 1024 -lof file_list.txt -stdin (pipe from stdin) -rescale 0.01 0.01 0.001 -rescale_xy 0.01 0.01 -rescale_z 0.01 -reoffset 600000 4000000 0 Supported Raster Outputs -o dtm.asc -o dsm.bil -o canopy.flt -o dtm.dtm -o density.xyz -o spreadsheet.csv -o intensity.img -o hillshade.png -o slope.tif -o false_color.jpg -oasc -obil -oflt -oimg -opng -odtm -otif -ojpg -oxyz -nil -odir C:\data\hillshade (specify output directory) -odix _small (specify file name appendix) -ocut 2 (cut the last two characters from name) LAStools (by martin@rapidlasso.com) version 141218 (unlicensed) usage: las2dem -i lidar.las -o lidar.asc las2dem -i lidar.las -o lidar.bil -intensity -kill 50 las2dem -i *.las -step 2.0 -opng -hillshade las2dem -i lidar.las -o lidar.png -utm 11S -false las2dem -i lidar.las -o lidar.png -sp83 TX_N -intensity -false -set_min_max 10 50 las2dem -i lidar.las -ll 640000 4320000 -ncols 400 -nrows 400 -o lidar.jpg -gray las2dem -i lidar.las -keep_class 2 -o dem.png -sp27 PA_N -last_only -gray las2dem -i lidar.las -keep_class 8 3 -o dem.tif -step 2.0 -intensity las2dem -h