TAG: Survey Scene

UAV manufacturer senseFly joins April 20 webinar panel

April 4, 2017By

A speaker from UAV manufacturer senseFly will appear on the free April 20 webinar, “From Flying Drones to Doing Business,” addressing ease of use for the user in business applications. The Switzerland-based company specializes in professional-grade UAVs for survey, mapping, precision agriculture and asset inspection. The company recently became the first drone operator to be granted anytime Beyond Visual Line... read more

GNSS and the Surveyor: Take Me to School

March 1, 2017By

The adaptation of GPS for civilian use is the single greatest step taken by  the land surveyor, more specifically the advance to  real-time kinematic networks. Now unmanned aerial vehicles enable data collection in places thought impossible previously, and laser/LiDAR scanners are on the horizon as the next game-changer. But how did we get here? An understanding of our history can... read more

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Analyzing NGS’ GPS on benchmark dataset used to make GEOID12B

October 5, 2016By

These columns have focused on procedures and routines for establishing GNSS-derived orthometric heights. There are many ways to analyze and investigate GNSS data and adjustment results. I have provided some basic concepts that I believe are important for users to understand. The selection of constraints is a very important part of establishing accurate and consistent NAVD 88 GNSS-derived orthometric heights. All... read more

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Establishing orthometric heights using GNSS — Part 8

August 3, 2016By

Upcoming Survey Scene newsletters will carry additional columns in this series. Basic procedures and tools for determining valid published NAVD 88 GNSS-derived orthometric heights for constraints These columns have provided the reader with basic concepts, routines and procedures for understanding, analyzing, evaluating and estimating GNSS-derived ellipsoid and orthometric heights. In my last column, Part 7 (June 2016), we analyzed the changes in adjusted heights... read more

Establishing orthometric heights using GNSS — Part 7

June 2, 2016By

Basic procedures and tools for determining valid NAVD 88 heights for constraints To date, the six parts of “Establishing Orthometric Heights Using GNSS” have provided the reader with basic concepts, routines and procedures for understanding, analyzing, evaluating and estimating GNSS-derived ellipsoid and orthometric heights. In Part 5 of this series, we discussed National Geodetic Survey’s NGS 59 guidelines and methods for evaluating the results... read more

GNSS and the real-time network: The surveyor’s best friend

May 4, 2016By

A lot of talk is being made about UAVs these days and how this technology is going to revolutionize many industries, with surveying being one of the biggest users. I won’t deny the impact this new tool is going to have on our profession (as written in my last column). But I don’t think it will compare to the use... read more

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Establishing orthometric heights using GNSS — Part 6

April 6, 2016By

Basic procedures and tools for ensuring GNSS-derived orthometric heights meet the project’s desired accuracy To date, this series of columns has addressed the following topics: basic concepts of GNSS-derived heights, National Geodetic Survey’s (NGS) guidelines for establishing GNSS-derived ellipsoid heights (NGS 58), differences between hybrid and scientific geoid models, procedures and tools for detecting GNSS-derived ellipsoid height data outliers, and basic... read more

Unlicensed UAV services threaten survey profession

March 2, 2016By

Unless one has lived under a rock for the past few years, it is hard to miss the influx of unmanned aerial vehicles (UAV), otherwise known as drones. Once considered expensive toys for hobbyists, these vehicles have become the hottest ticket in town for gathering aerial photography and video with professionals and amateurs alike. Miniaturization of cameras, batteries and GPS receivers has... read more

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