GeoCue’s repository of articles covering tools, tips, and workflows for processing point clouds in LP360 Geospatial.
A portion of the QA/QC process should be to determine what the Coordinate Reference System (CRS) or Spatial Reference System (SRS) is for the LIDAR data. Both horizontal and vertical CRS should be determined as part of the QA/QC process. This check should be done by the vendor prior to delivering the data, as well as the…
In November 2014, the American Society for Photogrammetry and Remote Sensing (ASPRS) released an updated standard, Positional Accuracy Standards for Digital Geospatial Data, to tie together past experience with current industry practice of preparing data, but not plotting the resulting maps. The new standard provides guidelines for calculating both the vertical and the horizontal accuracy.…
Contours are polylines that are used to connect locations of equal value and show how values change across a surface model. Most of the time, elevation values are associated with contours, but any continuous data can be used, for instance: precipitation, pollution or even atmospheric pressure. When talking about contours it is not uncommon to…
Note: While LASGUID.exe is still an option within the product, the introduction of LAS File Analyst in v2018.1 provides a more efficient tool for assigning the GUID, and is now the recommended tool. The LAS file specifications define the “Project ID (GUID data): The four fields that comprise a complete Globally Unique Identifier (GUID) are…
Quality control and quality assurance checks for LIDAR data continue to evolve as the industry identifies new ways to help ensure that data collections meet desired usage requirements. The U.S. Geological Survey (USGS) LIDAR Base Specification introduced a definition for spatial density distribution and regularity within LIDAR data. The requirement is that the spatial distribution…
Symptom: User receives an error message stating, “Caller’s Message: Failed to open the file for read/write. The file ‘F:\sample.las’ cannot be edited. (22630) Exception Information: HRESULT: 0x0 Unable to retrieve extended COM error information” when attempting to open data files for Read/Write. Probable Resolution: The error is happening because there is another program that…
We will soon be posting the first experimental release of LP360 for 2015. Recall that an experimental release (EXP) is available to customers with current LP360 maintenance contracts. The release is labeled EXP because we include features that are not completely final in terms of capabilities and user experience. We have really been busy with…
