42 articles Articles

GeoCue Group’s reference library articles covering a wide variety of geospatial topics related to our various product lines.

Z Bump – Debias Operation Validity Testing

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…

Share

Changing Your Reckon Password

Users can change their Reckon password at anytime using two methods outlined below.  If you know your current password and would like to change it. Login in to your Reckon account. Click the drop down arrow next you user name in the upper right hand corner of screen. Click Update. Enter your old password, then…

Share

USGS LIDAR Base Specification

Abstract In late 2009, a $14.3 million allocation from the “American Recovery and Reinvestment Act” for new light detection and ranging (LIDAR) elevation data prompted the U.S. Geological Survey (USGS) National Geospatial Program (NGP) to develop a common base specification for all LIDAR data acquired for The National Map. Released as a draft in 2010…

Share

What is the LAS Format?

LASer (LAS) File Format Exchange Activities What is the LAS Format? The LAS file format is a public file format for the interchange of 3-dimensional point cloud data data between data users. Although developed primarily for exchange of LIDAR point cloud data, this format supports the exchange of any 3-dimensional x,y,z tuplet. This binary file format…

Share

Can’t open software with a shortcut

After updating/upgrading a program, double-clicking the shortcut fails to open and gives this dialog shown in figure 1, stating, Problem with Shortcut: The parameter is incorrect.”. What is the target (right click the shortcut > properties) for the shortcut? This can also be found going to “Open File Location” in the context menu. You can…

Share

Breaklines in LP360- Part 3

Introduction to Part 3: In the last part of this series, we discussed in some detail how a Triangulated Irregular Network (TIN) can be constrained by features external to the point cloud model such as lines, points and polygons.  In this month’s edition, we will look at contours and how LP360 can extract elevation information…

Share

Breaklines in LP360- Part 2

This article is a continuation of the discussion of breaklines in LP360 (the standalone version). In last month’s installment, we discussed the overall concept of data modeling, especially the Triangulated Irregular Network (TIN). In this installment, I will discuss the general concept of adding constraints in the form of breaklines to these models. In future…

Share

Breaklines in LP360 – Part I

Prolog: I am writing a new whitepaper on model constraints in LP360 (any reference to LP360 where I do not add the term “for ArcGIS,” I am talking about the standalone version. This document is extracted and heavily revised from a series of articles that I wrote for the GeoCue Group Newsletter in 2013. The…

Share

Using FileZilla to Exchange Files with GeoCue Group Support

At times while working with GeoCue Group Support it may become necessary to exchange large files or large numbers of files. We suggest the use of an FTP Client to make this easier. If you don’t have your own, or are not familiar with using an FTP client we suggest using the FileZilla project. FileZilla…

Share

zLAS File Format

Files with a zLAS extension are usually the ESRI proprietary LAS compression format. The ESRI LAS Optimizer improves archiving, sharing, and use of LAS format LIDAR. Optimization is accomplished in several ways: Lossless compression Spatial indexing Statistics generation The compression ratio the optimizer can achieve is typically much better than generic compressors. This is because…

Share