Knowledge Base GPS GNSS GIS

Knowledge Base

Our knowledge base is full of written and video tutorials that explain how to use our GNSS products and related partner technologies. Discover how to do something new, or browse educational articles about GNSS. Have an article idea? Contact us and mention the knowledge base.

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Eos Tools Pro: Video Overview for Android App Users

Eos Tools Pro is the free Android app that helps you monitor high-accuracy location in the field. See your DOP, RMS values, PDOP, Differential Status & more.

Why Doesn't Your GPS Data Line Up with Your GIS Data?

Why Doesn’t My GPS Data Line up with My GIS? Eos explains common challenges to GNSS workflows on any device, and what to do to fix them.

Eos Tools Pro: How to Compute Datum Offset Values

Knowing how to compute datum offsets is important for shifting between datums. The Eos Tools Pro app now supports computing datum shifts. Here's how to use it.

How Do You Know If Your Mobile Device's GPS Accuracy is Lying?

Wondering how to know if your mobile device GNSS accuracy is correct? This article will break down common issues and how to fix them on iOS or Android.

SBAS: How to Use GNSS Receivers for Submeter GNSS Mapping

This article shows you how to use the four constellations for sub-meter GNSS mapping with Arrow. Using GPS, Glonass, Galileo, and BeiDou increases accuracy.

Base Station: Set Up Your Own Arrow GNSS RTK Base Station

In this article, we show you everything how to set up your own RTK base station with an Arrow GNSS receiver and related tools.

ArcGIS Collector Webinar: Getting Started with High-Accuracy Data Collection

Learn how to create your ArcGIS organizational account, build & share web maps, collect & edit features and attributes in Collector, and use your Arrow GPS.

Site Scan Manager: How to Get Orthomosaics Accurate to an Inch

In this article, we show you how to generate accurate orthomosaics and DEMs by setting up just 5 ground control points (GCPs) and using Site Scan Manager.

SBAS: Getting Free Submeter GNSS Corrections Globally

This article gives you an overview of the available global SBAS systems, as well as their coverage areas and what accuracy to expect.

ArcGIS: High-Precision GNSS Data Collection for Mobile GIS is Here

Esri released ArcGIS Collector 10.4, the first version to support GNSS metadata fields from GNSS receivers including Eos Arrow receivers.

ArcGIS Collector: How to Record Location Metadata from Arrow GNSS Receivers

This article shows you how to record GNSS metadata in ArcGIS Collector by adding metadata fields to the feature service, either via python or manually.

GLONASS: What to Expect From the Leap Second Added in 2017

On Dec. 31, 2016, a positive leap second was inserted into UTC. Here is what to expect for how this leap second might have disrupted GLONASS.