40 articles Articles

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…

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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…

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Adjusting image positions in Agisoft Metashape with ASPSuite local coordinate transformation

ASP Suite has the ability to adjust camera positions based on a local coordinate system. These positions are not updated in the EXIF data, but placed in a file in the “PPK” folder from the ASPSuite project. To import this file into Agisoft Metashape, please follow the instructions below: Open Metashape and import project images.…

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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…

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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…

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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…

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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…

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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…

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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…

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Mapping the Battle of Gettysburg – Little Round Top Revealed

GeoCue Group recently partnered with the National Park Service (NPS) in a pilot project to assess culturally significant areas within Gettysburg National Military Park using small unmanned aerial systems (sUAS). The area of interest (AOI) for this project was the western face of Little Round Top. Little Round Top was the location of a defensive…

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