Tag Archives: geodesy
xyHt Magazine August 2017 Issue
To view this issue as it appears in full in print, click the cover: Below are featured articles from the issue on our website: Editorial Fire, Ice, and Latitude in Ecuador Nicholls State University Geomatics Program Photogrammetric Engineering at The National Polytechnic Institute Drones and Surveying Flood Zones Controlling the Future with Training Women in...
Error Ellipses
Part 2: Components and Increasing Probability In the previous article (April 2017) I discuss the correlation of the coordinate values for a station and how an error ellipse is used to determine the direction of the largest error at a station. In this article I review the components of an error ellipse, the process that...
Weekly xyHt News Links: 6/16/17
RIEGL has received the Sebastian Sizgoric Technical Achievement Award at this year’s JALBTCX conference in Savannah, Georgia. Record attendance for GEO Business 2017 Identified Technologies Aligns with DJI to Offer Best-in-class Commercial Drone Solution Survey and Mapping Company Partners with Leading Unmanned and Manned Flight Service Experts Aeroscout launches UAV helicopter for high-altitude flight Congress increases funding...
Part 1: Foundations for Computing Error Ellipses
Standard Error Rectangle and Error Ellipse What is an error ellipse? One of the advantages of a least-squares adjustment over other methods is that a byproduct of the adjustment is not only the most probable values for the unknown coordinates but also standard deviations on these values Suppose for a moment that we are computing...
xyHt Magazine March 2017 Issue
Click here to view the March 2017 issue of xyHt magazine.
GNSS & Educational Equations: A Grid-to-Ground Project
When planning GNSS control surveys on highway projects, it is important to understand the limitations of GNSS. Most highway projects are long, and linear distances that are wide open horizontally and vertically and are ideal for GNSS surveying. However, in rural and city areas, tree canopies and high-rise buildings will obstruct the GNSS signals, so...
