Built Structures

Septentrio, Esri BeLux Bring Centimeter Accuracy to Mobile GIS Apps

June 21, 2013By
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Septentrio NV, the Belgian manufacturer of high-end GNSS receivers, and Esri BeLux, the regional distributor of Esri software, have joined forces to offer a user-friendly mobile solution that is accurate up to 1 centimeter. The combination of Esri software and the AsteRx-m GeoPod operates seamlessly using standard, open interfaces on any professional tablet. Used today by a major utility company,... read more

Trimble Launches Unmanned Aircraft System for Photogrammetric Aerial Mapping

June 17, 2013By
The Trimble UX5.

Trimble has introduced its next-generation Unmanned Aircraft System (UAS) — the Trimble UX5 aerial imaging rover with the Trimble Access aerial imaging application. The new solution builds upon the strengths of its predecessor, the Trimble Gatewing X100, to offer enhanced image quality and intuitive workflows. Combined with the Trimble Business Center photogrammetry office software module, the Trimble UX5 is the... read more

GeoGathering 2013: Have You Developed Your Geospatial Data Strategy?

May 2, 2013By

The conference GeoGathering: GIS for Gathering and Production Lines will be held Colorado Springs at the Cheyenne Mountain Resort on August 21-22, 2013. With the theme of “Developing a Data Strategy: Data Collection and Sharing,” the conference focuses on how operators collect and share information about their assets to increase operational safety and improve pipeline decision-making. “Today, acquisitions and fast... read more

This article is tagged with and posted in Built Structures, Construction, Mapping, Survey News

Topcon Announces MR-1 Precise Heading Solution

April 11, 2013By
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Topcon Positioning Systems has released the MR-1 Heading System, an OEM GNSS solution for high-performance positioning and heading. Using the MR-1 receiver and Topcon’s MG-A8 antenna, the system provides “centimeter-accurate RTK positioning and better than 1/10 of a degree heading accuracy in challenging environments,” said Doug Langen, TPS GNSS product manager. “The rugged MR-1 receiver is water and dustproof and... read more

This article is tagged with and posted in Built Structures, Latest News, Mapping, Marine, OEM News, Product Showcase, Survey News, Surveying

Applanix Introduces POS LV 120 for Improving Land Mobile Mapping Productivity

October 10, 2012By
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Applanix has introduced the POS LV 120, the latest version of its positioning and orientation systems for land vehicles. Using commercial Micro-Electro-Mechanical (MEMS) inertial measurement unit (IMU) technology, the Applanix POS LV 120 is a small, lightweight system and provides an economical solution for any continuous positioning and orientation application. POS LV 120 is a fully integrated, turnkey position and... read more

On the Edge: Tracking Slips and Creeps: Earthquake Monitoring Gets Substantial Boost from GPS

July 1, 2011By
Arrow on a Velocity Field Map of Oregon and Washington represent ground motion as measured by GPS at each particular location. The grey circles are 2 sigma error ellipses (click to enlarge.)

The Earth’s surface is constantly shifting, being deformed as earthquake faults accumulate strain, and slip or slowly creep over time. Not long ago, scientists relied solely on seismometers to monitor the earth’s movements. Today, GPS has taken prominence as an indispensible tool. PANGA, the monitoring network covering the Pacific Northwest, uses GPS to monitor this movement by measuring the precise position (within 5 millimeters or less) of stations near active faults relative to each other. By determining how the stations have moved, ground deformation can be determined. read more

Low-Frequency Vibrations

April 1, 2010By
FIGURE 21. Morlet CWT of time series of residuals with 0.08 Hz sine wave with 1-millimeter amplitude; 5-percent level of sine-wave detection shown as a thick contour.

Detection with High-Rate Data and Filtering
Multipath makes it difficult to detect very low-frequency structural vibrations, ranging from 0.05 to 1 Hz, important in characterizing dynamic loads and determining safe structural lifetimes. The authors have developed a phase-residual method for use with very high-frequency data to distinguish receiver noise, multipath, and the periodic displacements that are most structurally significant. The methodology can apply to bridges, tall buildings, and towers. read more

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On the Edge: Lost Graves, Trail of Tears

March 27, 2010By
OnEdge-MapSlice

During the winter of 1838–39, the great Native American Cherokee Nation trekked across southern Illinois, in a forced removal by the U.S. government from their ancestral homeland in Tennessee. Harried, unequipped, and unsupported by their captors, thousands died on the Trail of Tears. Burial records were not kept, and burial locations remain lost to this day. Local history suggests that some Illinois settlers allowed the Cherokee to bury their dead on small plots of land adjacent to their own family cemeteries. One such plot, the Campground Presbyterian Church cemetery near Anna, Illinois, may contain unmarked Cherokee graves. read more