Survey

Trimble Launches VRS Now Service in New Mexico

August 11, 2015By

Trimble has launched its Trimble VRS Now correction service in New Mexico. The commercial subscription service provides surveyors, civil engineers and geospatial professionals in the region with instant access to real-time kinematic (RTK) GNSS corrections without the need for a base station. Using both the GPS and GLONASS constellations, the Trimble service delivers centimeter-level RTK corrections customized for each GNSS receiver’s... read more

Establishing Orthometric Heights Using GNSS — Part 2

August 5, 2015By
Figure 2. NAD 83 (2011) Network Design for Stations EA0873 and EA0875. [Note: GNSS Vectors for GNSS projects GPS 1588 and GPS 2057 were provided by NGS].

GNSS-derived ellipsoid heights are the basis for GNSS-derived orthometric heights, so it makes sense to make these ellipsoid heights as close to error free as possible. This article will discuss guidelines for detecting, reducing andr eliminating error sources in ellipsoid heights. It will focus on guidelines for establishing accurate ellipsoid heights in a local geodetic network. (Part 2 of a series) read more

JAVAD GrAnt Antenna Designed for High Performance

August 3, 2015By
GrAnt

The GrAnt by JAVAD GNSS is a versatile high-performance antenna. With J-shield — the JAVAD GNSS filter that protects GPS L1, Galileo L1 and GLONASS L1 bands — the GrAnt antenna can track GPS, GLONASS, Galileo, BeiDou, WAAS, EGNOS, MSAS, GAGAN and QZSS signals. J-shield brings in all the useful signals intact and rejects out-of-band signals with the slope of about 12 dB/MHz. Similarly, the... read more

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Frozen Assets: GeoDecisions Platform Tracks Icebergs

August 2, 2015By
Drifting tabular icebergs viewed from the Amundsen. (Photo courtesy of Greg McCullough, University of Manitoba)

A Canadian expedition team used GeoDecisions’ GeoILS platform to help track icebergs during a voyage to better understand how icebergs drift. An intelligent location server using the Esri ArcGIS platform, GeoILS enables users to monitor and locate assets and facilitate quick and coordinated responses. GeoDecisions, an information technology company specializing in geospatial solutions, partnered with Solara Remote Data Delivery Incorporated,... read more

Form Factor and Portability of Triumph LS: As High as Your Pole Can Reach

July 29, 2015By

By  Matt Sibole I follow the surveyor connect message board and have seen some general discussion of the form factor of the Javad Triumph LS. I wanted to go into a little more detail on the form factor and portability of a couple of the receivers in the Javad GNSS lineup. Most surveyors that have been using RTK GPS equipment have been trained to... read more

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Steep Questions: How Tall is K2?

July 29, 2015By
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Surveying the world’s highest peaks is a daunting task. One international survey team set out to measure the Himalaya’s K2 peak, the second highest in the world after Mount Everest. read more

McKinley Survey Team Returns

July 28, 2015By
McKinley Survey- summit-O

A team of four climbers has returned from the highest point in North America, Mount McKinley in Alaska, with new GPS survey data to determine a more precise height of the mountain’s summit. The data collected will update the commonly accepted elevation of McKinley’s peak, 20,320 feet. The last survey was completed in 1953. The USGS, along with NOAA’s National Geodetic Survey (NGS),... read more

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Esri and Leica Geosystems Combine for Mobile Data Collection

July 22, 2015By

Esri Collector for ArcGIS, a configurable mobile app for collecting and editing data in the field, has combined with the Zeno 20, Leica Geosystems’ ultra-rugged Android-based professional-grade handheld, in a new solution called ZenoCollector. ZenoCollector uses Collector for ArcGIS as its main user interface and comes bundled with an ArcGIS Online organizational subscription for one year. “Esri and Leica Geosystems... read more