GeoCue Group’s repository of knowledge base articles and FAQs covering Terrasolid tools, tips and workflows.
Relative vertical accuracy, or flight line offsets, or the swath-to-swath fit between flight lines or drive passes can be qualitatively assessed using dz images. Or quantitatively assessed by exporting and analyzing the values. The USGS LiDAR Base Specification has evolved over the years with some different recommendations for evaluating interswath (overlap) consistency, and there are…
The Affine Transform LAS Point Cloud Task is a versatile tool for modifying the coordinates of your point cloud. A common use is applying grid to ground conversions which require more than a simple scale or translation. How to setup the Affine Transform LAS Point Cloud Task to accomplish this may not be readily apparent…
For certain projects, it may be necessary to process and output derivative products in a user defined (local) coordinate system. There are multiple ways to accomplish this, but one is to have matching pairs of projected and local coordinates to define a local coordinate system and derive the transformation. If the rotation, scale and translation…
This post applies if your grid to ground conversion requires needing to apply a horizontal rotation about an origin point and is defined by: Horizontal Translation North (tN) Horizontal Translation East (tE) Horizontal Rotation (Rz) Horizontal Origin Northing (N0) Horizontal Origin Easting (E0) Horizontal Scale Factor Then, if the horizontal scale factor is one, luckily,…
This post applies if your grid to ground conversion requires applying a horizontal scale about an origin point and is defined by: Horizontal Origin Northing (N0) Horizontal Origin Easting (E0) Horizontal Scale Factor Scale based grid to ground transformations are probably the most common. If the origin point is not defined, it is usually implied…
A common practice amongst GeoCue customers (and internally) is to use previously established control points to compare with an sUAS produced point cloud to gather absolute accuracy statistics. The vertical mean error from these statistics is often used to “Debias” a dataset. This is simply shifting the point cloud data to match the measured control…
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…
MicroStation and TerraPhoto reference require a RGB orthomosaic image. The normal workflow for exporting sUAS derived orthomosaics from Metashape creates a RGBA image. Make sure the “Write Alpha Channel” setting in the screenshot below is unchecked to create a RGB orthomosaic in Metashape before attempting to import into TerraPhoto.
A macro fails when launched through Geocue Dispatch. Checklist Step Details, System Messages error reads “No design files on the working segment”. Additionally, reviewing the Sub Tasks for the specified task on the Dispatch Manager reveals the machine timing out and returning to pending queue. If the macro is set up to run in TerraScan:…
Only when running TerraScan macros on a project in TerraScan or through GeoCue’s LIDAR 1 CuePac can an overedge region be specified. The macro loads points from neighbor tiles to: support the algorithms maintain continuity between data files, such as providing for a continuous surface at the block edge Should be done when doing routines…
