Blog
A Correctly Weighted Least Squares Adjustment, Part 2
Estimating Uncertainties In the previous article (January 2016), I point out the unreliability of sample standard deviations as estimates for population standard errors when the number of repeated observations is very small, which is typically the problem in surveying. In this article I look at how we can estimate the standard errors for observations based...
Treasure Hunting with Geospatial Tech: Part One
Geospatial tech is increasingly being called upon in the search for treasure. Let’s look at some examples, and maybe you, too, could discover hidden riches! Pangaea #155 As the wind keens and the snow piles up outside my door I retreat into my cozy home for some arm-chair treasure hunting. I start with the Travel Channel’s...
United Surveyors of Arizona
United Surveyors of Arizona announces the launch of a new professional organization and opens membership opportunities [Editor’s note: xyHt is always happy to publish news of organizations or initiatives that help promote land surveying and other geospatial professions. Strong participation by individual practitioners in professional associations and societies at the local, state, national, and international levels...
An Inside Look
The New FAA UAS Registration Recommendations The UAS Registration Task Force (RTF) Aviation Rulemaking Committee has recently published its recommendations. For an insider’s look, we talked to Altavian’s John Perry, a member of the committee. Unmanned & Unlimited: Could you give us your take on the process? As a representative of MAPPS and as a...
Keeping Workers Safe in the Field
Above: Users in the field can pair the inReach wirelessly via Bluetooth with a smartphone or tablet to provide a dashboard control panel for the unit and facilitate easier typing and messaging. Credit: DeLorme Satellite communication technology provides a critical lifeline for teams working off the grid. Editor’s note: Cellular coverage is not as ubiquitous...
QGIS 2.5D Functionality
When I went into the office today, I had to write an amazing blog about the QGIS 2.5D functionality and how it was the beginning of QGIS’ journey into the 3rd dimension. Only I can’t, because Anita Graser, the author of “Learning QGIS 2.0” and owner of the Free and open source ramblings blog beat...
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