GeoCue’s repository of articles covering tools, tips, and workflows for processing point clouds in LP360 Geospatial.
The Planar Surface Statistics Point Cloud Task attributes a user drawn polygon with planar extraction statistics. It defines the best fit plane and computes the quality of fit values, which are stored as attributes on the shape file. It also serves as a diagnostic tool to facilitate the setting of planar filter settings. Statistics given…
LP360 has several command line executable style programs that assist with productivity for different tasks, particularly when working with large amounts of data or repeating processes. One way of using these commands is by incorporating them into MS-DOS style batch scripts. Another is by configuring corresponding commands and checklist steps within the GeoCue workflow software…
The elevation difference (dZ) tool will display, or generate images, based upon the settings that you select. For display those settings are located in the LAS properties -> Symbology -> Delta Z tab. The colors used by default usually indicate a good fit with green and a mismatch in red. Hence, open terrain areas generally…
The latest ASPRS Positional Accuracy Standards for Digital Geospatial Data shows the correlation between vertical RMSE and contour interval. The updated ASPRS standard uses accuracy based upon the RMSE (Root Mean Square Error) at the ground scale. The ASPRS Accuracy Standards for Large Scale Maps from 1990 used RMSE, however the difference comes in how the standards represent the accuracy…
The results of extracting the LAS header information from the Point Cloud Statistics Extractor or LDDump may contain EPSG, GeoTIFF or other codes for coordinate systems, datums, units, etc. For GeoTIFF tag or codes: http://geotiff.maptools.org/spec/geotiff6.html#6.3.1.3 In here you’ll find for example the codes used for Linear Units: Linear Unit Values (See the ESPG/POSC tables for…
The smooth corners contour option in LP360 is basically a choice between drawing contours as line strings or drawing them as curves. The Smooth Corner Vertex Spacing parameter is the number of vertices to be added between the existing vertices that are found where the contour crosses the triangle edge. Those vertices on the triangle…
The new Coordinate System Utility in LP360 2015 allows you to define horizontal and vertical coordinate systems and output PRJ files. The Coordinate System Utility dialog allows you to set the coordinate system of a project or output file and shows descriptions of selected coordinate systems. You are able to select from predefined horizontal coordinate…
Do you ever find yourself performing the same point cloud task over and over again for larger datasets? A new tool available in 2015.1 Service Pack A may help by allowing you to run point cloud tasks from the command line. Named “LPRunPCT.exe”, this application contains a number of command line options and associated parameters…
LP360 can read LAS files with waveform data, as long as the files are LAS v1.3 or v1.4. LP360 cannot manipulate the waveform itself and has no tools at this time to make use of the waveform information. However, LP360 can manipulate the discrete points that were generated from the wave. For example, modifying the…
