Popular Archived Series

GIAA Mailbag: On Prism Configuration and Checking the Adjustment of Leveling Devices

Tool tips.
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The GPS Observer

Tides and their relationship to vertical datums.
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GIAA Mailbag: On Centering Errors for Dual-Axis Compensators and Sun Effects on Tubular Vials

Tips on centering errors for dual-axis compensators and sun effects on tubular vials.
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GIAA Mailbag: On properly maintaining and calibrating instruments.

Basic care of instruments at the office so they operate properly in the field.
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The GPS Observer: Geoid models.

In this month's column, I will discuss the geoid models developed by the United States National Geodetic Survey (NGS).
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GIAA Mailbag: On sighting distances with digital levels and the accuracy of GPS receivers with WAAS capabilities.

Is it possible increase distances between setups to perhaps twice the maximum distance of 120 m that we try to achieve when the terrain allows it?
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The GPS Observer

On Galileo, the European satellite navigation system.
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GIAA Mailbag: On Carrying a Total Station and the Accuracy of Reflectorless Total Stations

Do manufacturers recommend carrying the instrument on the tripod?
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The GPS Observer: GPS Modernization

The future of GPS satellites.
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GIAA Mailbag: On Errors in Trigonometric Leveling

Tool tips from industry experts.
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Image Galleries

HxGN Live

More than 3,500 attendees from more than 70 countries attended HxGN Live, the annual Hexagon AB user conference, at the MGM Grand Hotel & Casino in Las Vegas on June 3-6. About 450 keynotes and panel discussions were held, and several companies from around the world exhibited their geospatial products. Here are a few snapshots from the event.


POB January 2015 Cover

2015 January

In this January 2015 issue of POB, we take a look at integrated technologies that provide real-time 3D measurements of a Brisbane construction site.

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Unmanned Aerial Systems (UAS)

With the unmanned aerial system (UAS) presence growing in surveying, you will in 2015:
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Surveyor Statues

The perfect gift or award for any special occasion.

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The #1 buyers' guide for land surveyors and geomatics professionals. Search listings for software and equipment manufacturers, equipment dealers and professional services. CLICK HERE to view GeoLocator.