216 articles LP360 Tools, Tips and Workflows Page 2 / 22

Information regarding the tools available in LP360.

LP360 Error: Getting Spatial References Failed. (17124)

Problem: In LP360 for ArcGIS, while trying to Define the 3D Window’s Extent, LP360 errors stating, “Getting Spatial References Failed (17124)”. Expanding the error message dialog for more information reveals, “QI to ISpatialReference failed (21422)”. Probable Resolution: The most probable cause is the lack of a Spatial Reference System (SRS) specified on the LAS Layer…

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LP360 Error: Completing the construction of the profile line failed. (17020)

Problem: In LP360 for ArcGIS, while trying to Draw a Profile Line, LP360 errors stating, “Completing the construction of the profile line failed. (17020)”. Expanding the error message dialog for more information reveals, “QI to ISpatialReference failed (21422)”. Probable Resolution: The most probable cause is the lack of a Spatial Reference System (SRS) specified on…

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Automatic Ground Classification of Dense Point Clouds in LP360

The density of point clouds (usually expressed as points per square meter) is increasing on what seems to be a monthly basis.  This is particularly true of point clouds derived from Dense Image Matching (DIM), the clouds produced from software such as PhotoScan, Pix4D, DroneDeploy and so forth. You can quickly check the density of…

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Raster Bit Depth

GeoCue, Terrasolid and LP360 can all output Raster files with different Bit Depths. The bit depth (sometimes called pixel depth) of a cell determines the range of values that a particular raster file can store, which is based on the formula 2n (where n is the bit depth). For example, an 8-bit raster can have…

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White Box in upper right corner of Map View

Problem: When using a machine with NVIDIA Quadro K420 disply cards, LP360’s Map view can fail to display any information and can show a white cross-hair and box. Probable Solution: Roll back to 4.5.0 NVIDIA 369.39 Display Driver

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Fast TIN option’s influence on Contours

When generating contours from a gridded point cloud, issues can arise in the resulting contours.  This can cause horizontal offsets between lines from separate processing blocks resulting in contour lines that are split into multiple segments. Usually, the “Use Fast TIN” option is checked in the Las Properties dialog. The default value. This option uses…

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Tips for Classify Ground with DIM datasets

LP360 can be inefficient when working with very dense point clouds, such as Dense Image Matching, for ground classification if appropriate steps are not taken in the workflow. In fact, be aware that it simply crashes if you have to use a large seed size (e.g. 200 feet on some machines) that requires more points…

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Point Cloud Task Doesn’t Execute when I Click Apply

Problem: When I click apply my point cloud task does not execute. Probable Resolution: Clicking apply only saves the changes you made to the Point Cloud Task (PCT). To execute a PCT one must use one of the execute tools located on the Point Cloud Task toolbar.

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How do I Create a LAS Shape File Index of my LAS Files?

The new LDExport tool provides a quick means of generating a shapefile index of your LAS files. Download Export_sidx_settings.xml, and modify the HorizontalUnitsEPSGCode, and HorizontalUnitsEPSGCode to match the LAS files. Then execute the following in a command line, where the LAS files are located in “D:\Training_Data\Davidson_TN_2016\LAS” and the settings file was saved to “D:\Training_Data\Davidson_TN_2016”. Error messages:…

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DZ Surface Value Computation

The Export Wizard can be used to compare the relative accuracy of returns from overlapping flight lines.  Using the ‘Surface’ Export Type, the ‘Point Insertion’ Surface Method , and the ‘dz Images’ Surface Attribute, will produce a useful visual representation of the vertical mismatch from flight line to flight line. This tool creates cells with…

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