Elevation is the difference between the earth’s surface and a point above or below it. But the earth’s surface isn’t the same everywhere. It’s full of physical features, like mountains and valleys. So how can we measure elevation? Explore how in the latest Learning Center article from the Eos January 2018 issue.
What is the difference between the ellipsoid, mean sea level, geoid, geoid height, and orthometric height — and which one is right? Learn how the ellipsoid elevation your GPS receiver captures relates to the geoid, how to convert between the two so you can start using your data, and why most GPS receivers don't output the orthometric height you rely on.
UAVs and GNSS: Using High-Accuracy GNSS to Set Ground Control Points (GCPs) for UAVs Inexpensive unmanned aerial vehicles (UAVs) can collect a tremendous amount of valuable imagery that can be used to produce high-precision orthophotos resulting in 2 cm (or even less) pixel resolution. UAVs and GNSS receivers are amazing tools that complement each other.
In this hour-long webinar from Esri, Eos Positioning Systems, and SSVEC, you'll see how one electric co-op gathered 600 assets per day with centimeter accuracy. Through a combination of the ArcGIS platform, a new release of Collector for ArcGIS, and the Arrow Gold GPS / GNSS receiver, SSVEC overcame challenging, mountainous terrain to increase their asset data quality. Kurt Towler, Jeff Shaner, and their team walk you through the project workflow in this webinar.
From the Pioneers of High-Precision Bluetooth GNSS Receivers for iOS, Android and Windows Why Doesn’t My GPS Data Line up with My GIS? As GNSS receivers become more accurate, more affordable, and easier to use with your smartphone and tablet computer, they are going to challenge the accuracy of your GIS database. How many times
You took a great amount of data with your GPS / GNSS receiver. So why isn't it the same as your GIS data? The secret lies in how each technology works, and has advanced. Learn how to make your GPS and GIS data sync up in this article from the Eos May 2017 issue.
How to know if your mobile device GNSS accuracy is correct — or if your device is lying to you? It’s really cool when your mapping app displays the estimated accuracy of the GNSS receiver you are using. Conversely, there’s nothing more frustrating than your mapping app showing a GNSS estimated accuracy that is wrong .
Is your mobile device lying to you about GPS accuracy? No, but in this Eos April 2017 issue we'll show you how to make your receiver and mobile device talk the same language. Plus, we'll also show you how to pair your Arrow via Bluetooth so you can start recording high-accuracy data today.