Symptom: Receive a message in the lower left corner of LP360 indicating that the “Draw operation failed for at least one layer (23021)”. Probable Resolution: At least one of the layers in your Table of Contents (TOC) is a WMS layer but your project layer has no Current Coordinate System (SRS) or an unknown Current Coordinate…
There are two tools in GeoCue that can be used to update the coordinate reference system information found in the header of an LAS file. Both of these tools are normally found in the Utilities tab of standard LAS Working segment checklists or may be added to your custom checklist using Environment Builder. Update Geocoding…
An important evaluation to make when performing a QAQC analysis of a LIDAR data set is a control point comparison. Typically, this refers to checking the vertical accuracy of a LIDAR data set. In regards to vertical check/control point location: “Unlike horizontal checkpoints, vertical checkpoints are not necessarily required to be clearly defined or readily…
Problem: If you have an older computer with older display drivers then you may notice that every time ArcMap refreshes a raster view, there is a noticeable ‘flash’ as the display updates. This ‘flashing’ can become quite annoying and slow down your processing. Probable Resolution: ArcMap does have a hardware acceleration option for supported layers. If…
Problem: Receive either a “Classify is Complete” or a “ClassifyByGeometry function fails” with an overall message, or by feature messaging, indicating “Geometry not within read/write loaded point extent (10075)”. Probable Resolution: The warning message indicates that the LAS files intersecting with the indicated feature are not open for read/write, hence, no classification based on that…
One of the common requests we receive from our GeoCue users is to add the ability to archive or off-line projects when they are completed. Once a project has been completed and fully delivered to the customer, it needs to be transferred effectively out of production operations to an enterprise data archive. Archiving a completed…
Building a Simple Corridor We will use an example of building a road corridor. For this exercise, we have created a new project in the NAD 83, Zone 16 N meters horizontal coordinate system and ellipsoid, meters for the vertical system. To this project we added a reference raster layer and imported the Madison County…
Service pack 5 for GeoCue 2014 enables some capabilities to process your LASA v1.4 files from start to finish using TerraScan for CE. We leverage GeoCue’s ability to launch a TerraScan project for an external application and a registry edit to direct GeoCue to use the TerraSlave for CE. To facilitate use the links below…
Sometimes it may be useful to “cookie-cut” LIDAR points by polygons. The polygons may represent rectangular grids, such as quarter quads, or can be irregularly shaped. Cookie-cut allows you to use a shape file of one or more polygons. An attribute from the Shape file can be used to name the various files. This is set…
A quick and basic way to get information about projection information, GPS time and the number of points within an LAS file is to run the LDDump executable. The program is designed to pull the information directly from the public header block of the LAS file, provided the header has been correctly populated with the…
