WEBVTT 1 00:01:04.240 --> 00:01:08.120 Lesson 10d1: Importing Data into LP360. 2 00:01:08.120 --> 00:01:16.440 LP360 is a family of tools for visualizing, manipulating and editing point cloud data and are offered both as an extension for ArcGIS, 3 00:01:16.440 --> 00:01:19.880 and as a standalone desktop platform for Window. 4 00:01:23.000 --> 00:01:29.840 By the end of this lesson, you will be able to open lidar point cloud LAS data files in the LP360 Viewer, 5 00:01:29.840 --> 00:01:38.880 visualize the data in 2-D and 3-D, change the visualization using toolbar functions, and turn on all or specific lidar point Classes. 6 00:01:41.400 --> 00:01:45.880 Before we begin, you will want to download some lidar data to use during our exercise. 7 00:01:45.880 --> 00:01:50.880 For this lesson, we've conveniently packaged six tiles of LAS data into a zip file called 8 00:01:50.880 --> 00:02:02.000 “USGS_LPC_CO_SoPlatteRiver_Data_for_Lessons.zip” and loaded it to our FTP website. 9 00:02:02.000 --> 00:02:05.760 Please navigate to this location and download the zip package. 10 00:02:05.760 --> 00:02:11.640 Note that this package file is over 700 Mbytes and may take 10-15 minutes to download. 11 00:02:11.640 --> 00:02:18.000 After you've downloaded the lidar data, extract the zip file into a folder on your local computer to use during this lesson. 12 00:02:18.000 --> 00:02:24.920 The National Map has a download client where you can find USGS products to include elevation data such as lidar point clouds. 13 00:02:24.920 --> 00:02:31.440 If you are interested in learning more about downloading products on The National Map, be sure to check out our training videos. 14 00:02:34.040 --> 00:02:40.600 LP360 is available in six licensing levels with capabilities ranging from simple point cloud visualization, 15 00:02:40.600 --> 00:02:45.000 to more advanced QA/QC, classification and analysis functions. 16 00:02:45.000 --> 00:02:53.360 We are using the standalone LP360 Viewer license, version 2018.1.57.7 for this tutorial. 17 00:02:53.360 --> 00:02:58.240 The standalone LP360 Viewer license is freely available through the manufacturer. 18 00:02:58.240 --> 00:03:02.320 If you do not already have the LP360 viewer on your computer, 19 00:03:02.320 --> 00:03:04.040 please visit their support site 20 00:03:06.840 --> 00:03:10.840 and click on the “Get Support” button below the LP360 logo. 21 00:03:15.720 --> 00:03:19.040 Type LP360 in the subject line of the email 22 00:03:22.080 --> 00:03:28.480 and type “I am writing to request a license for the LP360 viewer” in the body of the email. 23 00:03:28.480 --> 00:03:33.440 You will receive a license manager and instructions for setting up LP360. 24 00:03:40.000 --> 00:03:43.000 Your system administrator may need to assist you. 25 00:03:43.000 --> 00:03:49.800 Additionally, for supplementary information about LP360 Viewer Tools, please reference the tool guide. 26 00:03:53.160 --> 00:03:56.120 Launch the LP360 Viewer. 27 00:03:58.240 --> 00:04:08.760 When LP360 loads you will see the ‘View' pane, the ‘Table of Contents' pane, the ‘LP360 Toolbar,' and the ‘Display and Navigation Toolbar'. 28 00:04:08.760 --> 00:04:12.040 Toolbars can be toggled on and off through the ‘View' menu. 29 00:04:12.040 --> 00:04:17.440 If you click on the ‘View' menu, you should see checkmarks next to the ‘LP360 Toolbar,' 30 00:04:17.440 --> 00:04:23.880 ‘Display and Navigation Toolbar,' and the ‘Table of Contents.' If not, toggle them on now. 31 00:04:26.040 --> 00:04:34.560 LP360 is a point cloud tool, however, in addition to opening LAS files, it can also load vector and raster data with ease. 32 00:04:34.560 --> 00:04:43.840 To load LAS files, you can either click File> Open> LAS Files, or click the ‘Add LAS/Raster Layer' button. 33 00:04:47.760 --> 00:04:54.120 In the ‘Add Files' window, click the green ‘Add' button and browse to the location of the lidar point cloud LAS files 34 00:04:54.120 --> 00:04:56.920 that were downloaded from the FTP site. 35 00:04:56.920 --> 00:05:12.320 Click on the file named ‘USGS_LPC_CO_SoPlatteRiver_Lot5_2013_13SDD480395_LAS_2015 ‘ 36 00:05:12.320 --> 00:05:14.920 and click ‘Open'. 37 00:05:14.920 --> 00:05:20.840 In the ‘Open Setting' preferences, click the radio button to select ‘Open Read-Only.' 38 00:05:20.840 --> 00:05:25.880 Under the ‘Load Setting,' select ‘Load Files,' and under ‘Options,' 39 00:05:25.880 --> 00:05:31.520 toggle the ‘Pyramid' option and accept the default ‘Thinning' value of 16. Then click ‘OK.' 40 00:05:33.480 --> 00:05:38.400 This lidar tile is in Apex Open Space park, just west of Golden, Colorado. 41 00:05:38.400 --> 00:05:43.720 After a few seconds you should see the one tile of lidar data displayed in the ‘View' pane, 42 00:05:43.720 --> 00:05:48.200 and a LAS Layer_1 added to the ‘TOC' tab of the ‘Table of Contents.' 43 00:05:48.200 --> 00:05:52.000 The ‘LAS Files' tab shows additional information about this layer. 44 00:05:52.000 --> 00:05:56.400 Under LAS Layer_1, we can see that this layer contains one file 45 00:05:56.400 --> 00:06:00.400 and the name of the lidar tile that we loaded in the previous step. 46 00:06:01.360 --> 00:06:06.560 The ‘Load' icon next to the lidar tile name tells us that the lidar points are currently loaded. 47 00:06:06.560 --> 00:06:11.640 Double-clicking on this icon will unload the data and cause it to disappear from the ‘View' pane. 48 00:06:11.640 --> 00:06:15.080 This is especially helpful when you have multiple tiles loaded. 49 00:06:15.080 --> 00:06:18.480 Double-clicking the ‘Load' icon again will reload the data. 50 00:06:18.840 --> 00:06:22.040 The ‘View' pane defaults to displaying the full extent of the data. 51 00:06:22.040 --> 00:06:26.040 You can use the ‘Display and Navigation Toolbar' to explore the data further. 52 00:06:26.040 --> 00:06:33.120 This tutorial will cover the most relevant buttons; however, you may refer to the LP360 Tool Guide for a more comprehensive reference. 53 00:06:33.120 --> 00:06:38.000 This toolbar provides multiple options for Zooming in and out and panning through the data layer. 54 00:06:38.000 --> 00:06:42.880 The ‘Zoom In' or ‘Zoom Out' buttons enable you to zoom in or out of a spot of the map 55 00:06:42.880 --> 00:06:48.560 by left clicking in the ‘View' pane, or by left-clicking and dragging a rectangle in the ‘View' pane. 56 00:06:56.080 --> 00:06:59.720 Additionally, if you want to move around in the ‘View' pane without changing your zoom, 57 00:06:59.720 --> 00:07:03.440 you can use the ‘Pan' button to maneuver around to a new area. 58 00:07:07.400 --> 00:07:15.160 The ‘Zoom Previous' button returns to the previous zoom level, and finally, the ‘Full Extent' button returns to the default map view. 59 00:07:15.160 --> 00:07:22.880 The ‘LP360 Toolbar' enables us to easily change visualizations using the ‘Legend Types' and ‘Draw Types' drop-down menus. 60 00:07:25.040 --> 00:07:34.040 ‘Legend Types' displays points based on attribute values such as elevation, classification, intensity and point source ID. 61 00:07:34.040 --> 00:07:42.200 The availability of various ‘Legend Types' is dependent upon the attributes present in the loaded lidar tile. 62 00:07:42.200 --> 00:07:49.720 By default, LP360 visualizes the LAS point values using a ‘Display by Elevation' rainbow color palette 63 00:07:49.720 --> 00:07:55.480 where blue corresponds to the lowest elevation, and red corresponds to the highest elevation values. 64 00:07:55.480 --> 00:08:01.680 Notice that the ‘TOC' tab of the Table of Contents also displays ‘Elevation' as the current Legend type. 65 00:08:01.680 --> 00:08:06.160 Click on the ‘Legend Types' drop-down menu and select ‘Display by Classification.' 66 00:08:06.160 --> 00:08:11.440 The legend on the TOC tab now displays all possible point classifications. 67 00:08:11.440 --> 00:08:16.160 Note that not all of these point classifications will be represented in our LAS tile. 68 00:08:16.160 --> 00:08:23.000 In fact, from the ‘View' pane we can see that in our LAS file most of the points are classified as Ground (colored in orange), 69 00:08:23.000 --> 00:08:27.280 Unclassified (colored in gray), and High Noise (colored in pink). 70 00:08:28.160 --> 00:08:32.680 Now click on the ‘Legend Types' drop-down menu and select ‘Display by Intensity.' 71 00:08:32.680 --> 00:08:39.040 This is displaying lidar points as a gradient from black to white based on the intensity of the return pulse. 72 00:08:39.040 --> 00:08:44.480 Intensity is a measure of the surface reflectance and will be higher (lighter colors) 73 00:08:44.480 --> 00:08:52.680 for surfaces with stronger reflectance back to the lidar sensor and lower (darker) for surfaces with less reflectance. 74 00:08:52.680 --> 00:08:58.360 Up until this point, we have only been visualizing the LAS file based on point classifications. 75 00:08:58.360 --> 00:09:02.080 However, the ‘Draw Types' drop-down menu provides additional options 76 00:09:02.080 --> 00:09:04.520 for viewing data as different surface types. 77 00:09:05.000 --> 00:09:11.000 Click the ‘Draw Types' drop-down menu and select display the Triangulated Irregular Network or TIN surface. 78 00:09:11.640 --> 00:09:17.880 This ‘Draw Type' draws a TIN surface on-the-fly based on the attributes of the input lidar points. 79 00:09:17.880 --> 00:09:24.000 The ‘View' pane is now displaying a continous surface derived from lidar point intensity values. 80 00:09:24.000 --> 00:09:30.400 We can now see a lot more detail of the landscape including trees, a rock quarry, and a road. 81 00:09:30.640 --> 00:09:36.600 Now, use the “Legend Types” drop-down menu to view the original “Display by Elevation” legend as a TIN surface. 82 00:09:36.600 --> 00:09:42.040 Displaying the elevation values as a TIN surface gives us an excellent view of the topography of the area. 83 00:09:42.040 --> 00:09:47.400 However, notice how some of the finer features such as roads are harder to identify with this legend 84 00:09:47.400 --> 00:09:50.440 as compared with the previous ‘Display by Intensity' legend. 85 00:09:52.800 --> 00:09:58.680 LP360 provides the ability to apply intensity shading on top of the current display surface. 86 00:09:58.680 --> 00:10:03.600 Similar to the ‘Legend Types' tool, the ability to use the ‘Apply Intensity Shading' tool 87 00:10:03.600 --> 00:10:08.000 is dependent upon the existence of intensity values within your LAS dataset. 88 00:10:08.000 --> 00:10:12.320 Now click the ‘Apply Intensity Shading' button to the right of the draw type button. 89 00:10:14.600 --> 00:10:18.680 You should now see an intensity shading applied to the elevation surface. 90 00:10:18.680 --> 00:10:26.360 The addition of intensity shading accentuates many of the finer features on the surface such as roads and striations in the rock quarry. 91 00:10:26.360 --> 00:10:32.320 Though the ‘View' pane is displaying a lot of detail on the surface, we can see on the ‘LP360 Toolbar' 92 00:10:32.320 --> 00:10:37.120 that that our view is currently only displaying 1.56% of the data. 93 00:10:37.120 --> 00:10:43.920 At this scale it is not necessary to use 100% of the points to observe characteristics of the land surface. 94 00:10:43.920 --> 00:10:48.640 Additionally, thinning the data allows for greater performance while exploring the dataset. 95 00:10:48.640 --> 00:10:56.440 However, LP360 does provide a “Force 100% Resolution” tool which will force all points to be drawn on the screen. 96 00:10:56.440 --> 00:10:59.200 Click the “Force 100% Resolution” button. 97 00:10:59.200 --> 00:11:06.800 Because this is your first time using the ‘Force 100% Resolution' tool, you should see the “Full Resolution Help Tip” pop up. 98 00:11:06.800 --> 00:11:12.320 The tool tip warns that since rendering 100% of the lidar points is very memory intensive, 99 00:11:12.320 --> 00:11:21.120 the number of points drawn may exceed the ‘maximum cache size' allowed by this tool resulting in only a subset of the surface being generated. 100 00:11:21.120 --> 00:11:30.080 Since the ‘View' pane is currently displaying the entire extent of our LAS data, this tool will fail to force 100% resolution on the entire tile. 101 00:11:30.080 --> 00:11:38.480 Note this tool tip will only pop up if this is the first time using the “Force 100% Resolution” button during this session. 102 00:11:38.480 --> 00:11:41.560 Click “No” to exit the tool tip. 103 00:11:42.320 --> 00:11:49.120 Using the ‘Zoom In' tool on the ‘Display and Navigation Toolbar' zoom in on the building in the lower left corner. 104 00:11:49.760 --> 00:11:52.480 This is the Mother Cabrini Shrine in Golden, Colorado. 105 00:11:52.480 --> 00:11:56.840 The drop-down menu below the ‘View' pane shows the current scale of the display. 106 00:11:56.840 --> 00:12:01.240 This will be grayed out in the LP360 Viewer license software version. 107 00:12:01.240 --> 00:12:06.840 Using the ‘Zoom In' tool, zoom in until the scale display reads just under 1:1000. 108 00:12:07.920 --> 00:12:13.160 Now that we are zoomed into a smaller region, click the ‘Force 100% Resolution' button again. 109 00:12:13.160 --> 00:12:19.120 On the ‘LP360 Toolbar' you should now see that the ‘View' pane is displaying 100% of the data. 110 00:12:19.120 --> 00:12:27.360 Displaying 100% of the data on the subset of our LAS tile significantly increases the details we can observe in the the ‘View' pane. 111 00:12:28.040 --> 00:12:34.320 The outlines of the buildings and hedges are now sharply defined and we can even make out the lines in the parking lot. 112 00:12:34.320 --> 00:12:37.920 Now de-select the ‘Force 100% Resolution' button 113 00:12:37.920 --> 00:12:43.440 and use the ‘Full Extent' button on the ‘Display and Navigation Toolbar' to return to the full extent of the LAS tile. 114 00:12:43.960 --> 00:12:47.880 LP360 also makes it very simple to view the data in 3D. 115 00:12:47.880 --> 00:12:51.040 Start by activating the ‘Viewer Integration Toolbar.' 116 00:12:51.040 --> 00:12:56.760 This is accomplished by clicking the drop down ‘View' menu, and clicking the ‘Viewer Integration Toolbar.' 117 00:12:57.120 --> 00:13:00.760 The ‘Viewer Integration Toolbar' will now appear in the LP360 window. 118 00:13:01.120 --> 00:13:05.160 To use the ‘3D Window', click the ‘Toggle 3D Display' button. 119 00:13:05.000 --> 00:13:09.000 By default, the ‘3D Window' opens up without any data in it. 120 00:13:09.000 --> 00:13:12.920 You can also open the ‘3D Window' through the ‘View' drop-down menu. 121 00:13:12.920 --> 00:13:20.040 However, since your 3D window is already open, you should see a check mark next to the ‘3D Window' option showing that it is active. 122 00:13:20.760 --> 00:13:23.400 Now toggle the ‘Table of Contents' to hide it from view. 123 00:13:24.080 --> 00:13:27.440 We will now select the data to display in the ‘3D Window.' 124 00:13:27.440 --> 00:13:30.120 Click the ‘Draw 3D Viewer Extent' button. 125 00:13:30.120 --> 00:13:37.320 This will activate a selector cursor in the 2D ‘View' pane that can be used to choose data to display in the ‘3D Window'. 126 00:13:37.840 --> 00:13:42.120 We will look a the rock quarry in the lower right hand corner of the LAS tile. 127 00:13:42.120 --> 00:13:48.080 Draw an extent box over the quarry by left clicking the cursor and dragging box over the area of interest. 128 00:13:49.680 --> 00:13:55.360 When you let go of the cursor you will see a new white bounding box drawn in the 2D window. 129 00:13:56.280 --> 00:14:01.880 The ‘3D Window' is now displaying a 3D rendering of the point cloud data contained within that bounding box. 130 00:14:01.880 --> 00:14:05.800 We can explore the data in the 3D view using the mouse buttons. 131 00:14:05.800 --> 00:14:10.280 To Zoom, click and hold the left mouse button while moving your mouse forwards and backwards. 132 00:14:11.120 --> 00:14:17.120 To rotate the 3D view, click and hold the right mouse button and drag the tile around to a new angle. 133 00:14:17.960 --> 00:14:25.080 Similar to the 2D ‘View' pane, the ‘3D Window' also enables us to visualize data by changing ‘Draw Types' and ‘Legend Types'. 134 00:14:25.080 --> 00:14:31.080 On the ‘3D Window' toolbar, use the ‘Draw Types' drop-down menu and select ‘Display TIN Surface.' 135 00:14:31.080 --> 00:14:37.600 Also on the ‘3D Window' toolbar, ensure that the button that ‘Toggles hillshading of the TIN surface' is turned on. 136 00:14:38.120 --> 00:14:43.880 Now as you zoom and pan around in the ‘3D Window' you will notice large spikes protruding from the surface. 137 00:14:43.880 --> 00:14:51.000 Since we are displaying all the data point classifications, these spikes show the high noise point classifications present in our data. 138 00:14:51.360 --> 00:14:57.760 LP360 provides several methods to filter data in order to only display the data that are of interest to us. 139 00:14:57.760 --> 00:15:04.000 Additionally, 2D and 3D filters are separate, so you can change filter parameters in one window independently of the other. 140 00:15:05.040 --> 00:15:11.400 First, in both the 2D and 3D view windows, you will see a drop-down menu with the ‘Filter' currently set to ‘All Points.' 141 00:15:11.400 --> 00:15:16.640 The ‘Filter' drop-down option provides several pre-set options such as ‘Ground' and ‘Canopy.' 142 00:15:17.000 --> 00:15:22.120 Keep in mind that the availability of these filters will depend on the classifications within your LAS tile. 143 00:15:22.760 --> 00:15:26.200 Using the ‘Filter' drop-down in the 3D view, select ‘Ground.' 144 00:15:27.000 --> 00:15:31.400 The ‘3D Window' now only displays points that have been classified as ‘Ground'. 145 00:15:31.800 --> 00:15:36.640 Next, we can also select points of interest by changing the display properties for our LAS tile. 146 00:15:37.320 --> 00:15:40.520 Click on the ‘Display Properties' icon in the 3D window. 147 00:15:40.520 --> 00:15:44.200 This will open a ‘Viewer Properties' window for the LAS tile. 148 00:15:44.200 --> 00:15:51.520 The ‘Viewer Properties' window provides a lot of options to customize point symbology and point filters which are beyond the scope of this tutorial. 149 00:15:51.520 --> 00:15:54.920 In the ‘Viewer Properties' window, click on the ‘Display Tab.' 150 00:15:54.920 --> 00:15:59.200 This will open the ‘Points Filter' Tab showing the ‘Classifications' tab. 151 00:15:59.200 --> 00:16:04.560 Be sure that the ‘Use Points Filter for TIN' option is toggled on, if not, toggle it on now. 152 00:16:05.120 --> 00:16:13.040 This ‘Classifications' tab displays the ‘ASPRS Class Values and Names' that may be present within our LAS dataset. 153 00:16:13.040 --> 00:16:21.960 Notice that since we selected the pre-defined ‘Ground' filter in the previous step currently only Class 2 ‘Ground' and Class 8 ‘Reserved' are toggled on. 154 00:16:21.960 --> 00:16:27.120 In the ‘Classifications' tab toggle on Class 1 ‘Unclassified' and then click ‘Apply.' 155 00:16:27.120 --> 00:16:32.120 In the ‘3D Window' you should now see sparse vegetation appear on the ground surface. 156 00:16:32.120 --> 00:16:38.800 The ‘Classifications' tab provides complete control over which point classifications to view or exclude from the view. 157 00:16:38.800 --> 00:16:41.520 Click ‘Cancel' to exit the ‘Viewer Properties' window. 158 00:16:42.080 --> 00:16:46.080 Now, click ‘Applying Intensity Shading' on the ‘3D Window Toolbar.' 159 00:16:46.080 --> 00:16:53.480 As we saw in the 2D view, applying intensity shading sharpens fine surface details such as the quarry striations and the vegetation. 160 00:16:54.000 --> 00:17:02.280 In addition to the 2D and 3D views, LP360 Viewer provides profile view options which can be useful for further data exploration. 161 00:17:02.280 --> 00:17:09.440 To simplify the view interface, close the 3D view window by deselecting the ‘Toggles the 3D Window' button. 162 00:17:10.080 --> 00:17:16.200 Now, on the ‘Viewer Integration' Toolbar, click the ‘Toggle Profile Window' button to activate the ‘Profile View'. 163 00:17:16.200 --> 00:17:21.000 The ‘Profile View' window will appear at the bottom of the LP360 Viewer window. 164 00:17:21.000 --> 00:17:27.800 Select the ‘Draw the Profile Box in 2D View' and ‘Draw the Profile Center Line in 2D View' buttons. 165 00:17:28.520 --> 00:17:30.760 Now, click the ‘Draw a Profile Line' button. 166 00:17:30.760 --> 00:17:36.120 To create a profile, in the 2D ‘View' pane first click on a hill on one side of the valley, 167 00:17:36.120 --> 00:17:42.200 then move your cursor to a hill across the valley and click again thereby creating the center line for the ‘Profile View'. 168 00:17:42.200 --> 00:17:46.920 To adjust the width, move your cursor perpendicular to the center line. 169 00:17:46.920 --> 00:17:51.080 When you are satisfied with the width, click a third time to make your selection. 170 00:17:51.080 --> 00:17:55.760 The points contained within your ‘Profile Box' are now displayed in the ‘Profile View'. 171 00:17:56.160 --> 00:18:02.240 Now, enlarge the ‘Profile View' by hovering your cursor at the top of the pane until a resize icon appears, 172 00:18:02.240 --> 00:18:08.040 then click and drag the bar up to resize the window until you can view the extent of the profile. 173 00:18:08.040 --> 00:18:16.520 As with the 2D and 3D View windows, the ‘Profile View' also contains the ‘Legend Types' menu and the ‘Display Properties' menu. 174 00:18:16.520 --> 00:18:22.520 The ‘Profile View' is another convenient method to explore point classifications and attributes contained 175 00:18:22.520 --> 00:18:26.680 while simultaneously viewing the underlying topography of the surface. 176 00:18:28.960 --> 00:18:33.000 You've finished Lesson 10d1: Importing Data into LP360. 177 00:18:33.000 --> 00:18:41.240 In this lesson, we discussed how to load a single LAS file in LP360, explore the data in 2D, 3D and Profile views, 178 00:18:41.240 --> 00:18:46.200 and use the LP360, Display and Navigation, and Viewer Integration Toolbars. 179 00:18:46.200 --> 00:18:52.960 We also learned how to filter lidar data by classification and apply symbology based on lidar point attributes.