All posts by Gavin Schrock

East Meets West Meets East

Above is the object lens for the FOCUS 35, one the largest for robotic total stations with the prism directly attached; this differs from the legacy prism stems that can reduce returned signals. Photos: G. Schrock, from a recent tour of the Spectra factory in Shanghai. Multiple, distinguished legacy companies in precision optics and manufacturing...

GTL-1000

Construction Verification Automation

How multiple companies collaborated to solve persistent challenges to rapid comparisons of design models and constructed features—in high-precision 3D. Image above: the GTL-1000 scanner. When you look at the images in this article, if you see a piece of hardware and think this is a product review, you may be disappointed. It is an impressive-looking...

InSAR Quake rainbow

InSAR Quake “Rainbow”

This graphic, which some folks call a rippling rainbow effect, is part of the valuable post-quake analysis of the 6.4 and 7.1 magnitude earthquakes—and thousands of minor quakes—in the vicinity of Ridgecrest, California in early July 2019. This map—produced by the Advanced Rapid Imaging and Analysis (ARIA) team at NASA’s Jet Propulsion Laboratory in Pasadena,...

CAD+GIS for AEC – Finally “Going Steady”

The new release of Autodesk Civil 3D includes the Connector for ArcGIS. An Esri-Autodesk partnership, launched in 2017, takes yet another big step, and one that should make a lot of civil design professionals very happy. The sidelong glances, the flirting, the occasional dating … such has been the on-again/off-again relationship between these two giants...

New GNSS Kids on the Block

Test driving a new Tersus rover: There is more to the story than a $3,000 price tag. The advent of a $3,000 high-precision GNSS rover holds a certain appeal, even more so when a test drive reveals that it holds its own with top-end rovers in many ways. But there is more to this story...

Inexpensive Does Not Mean Cheap

A revolution is happening in affordable surveying and geospatial instruments and solutions: high-precision positioning has become much more accessible and affordable for existing and emerging end-user constituencies. Many folks may have found high-precision prohibitively expensive in the past or were resigned to low-precision choices, but now there are a lot more solution developers, manufacturers, and...