130 articles GeoCue Tools, Tips and Workflows Page 2 / 13

GeoCue: Classification Lookup VLR

***Warning: This VLR is not currently being written correctly and will be rectified in a service pack release*** In GeoCue 2017 we added the ability for GeoCue to write the Classification Lookup VLR as provided for by the LAS v1.4 specification. The Classification Lookup VLR is an optional VLR that can be used to convey…

Share

System.ArgumentException: Item has already been added. Key in dictionary: ” Key being added: “

Problem: User encounters a .NET crash, “System.ArgumentException: Item has already been added. Key in dictionary: ” Key being added: ” “, while attempting to generate TerraScan trajectories from LIDAR Source strips. Probable Resolution #1: We suspect corrupted entities on the layer in question. Create a new trajectory layer and try creating the trajectories to the…

Share

Error Setting Viewer Control Files: Unable to Locate SRTM Data

Problem: Attempting to load images into the viewer results in message, “Error Setting Viewer Control Files: Unable to Locate SRTM Data”. In GeoCue 2013 , a new elevation service based on the Shuttle Radar Topography Mission (SRTM) was added to the GeoCue Server. This service provides elevation data at 30 m post spacing outside the…

Share

Using Neighbours when Running Macros

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…

Share

Terminating Task in Dispatch Manager

Problem: The following error may be encountered while attempting to terminate a task in the Dispatch Manager: “An error occurred terminating the selected tasks. Detailed Description: System.NullReferenceException: Object not set to an instance of an object. …”   Solution: Errant tasks such as this can be deleted from the system through the use of the…

Share

Import Multiple Scanner Data

GeoCue has the ability to import source LIDAR strips with multiple scanners and assign the scanner number to the User Byte in the LAS format. The User Byte is what TerraScan uses for the scanner since no scanner attribute existed before LAS v1.4, and the field, even in LAS v1.4 is limited to a small…

Share

Setting the screen resolution and Scale

Problem: Many new laptops come with very high resolution screens, causing text and icons in various software packages to appear very tiny, or badly sized. Probable Solution: Reduce the screen resolution to 1920 x 1080 and scale the text to 100%, or as desired.

Share

CueTip – County Coordinate Systems

When working with data in county coordinate systems, the definitions of datum transformations are important. The steps in this CueTip provide recommendations and an example of such a project; beginning from project setup, to selecting appropriate Coordinate Reference Systems (CRSs), to properly defining the coordinate transformations. Please consult with your surveyor to determine the appropriate…

Share

Regedit for Population Error

Problem: While attempting to populate LAS Working Segments the process errors with an exception. In the system message column of the Checklist Step History you note the following exception: System.ArgumentException: Source array was not long enough. Check srcIndex and length, and the array’s lower bounds. at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32…

Share