Category Archives: Surveying
Methods of Analyzing Data Part 3: Data Snooping & the tau Criterion
In previous articles, I discuss two rudimentary techniques that can be used to identify blunders in data. However, anyone who has used an advanced least squares adjustment package knows that such software often uses a post-adjustment statistic known as the tau criterion. The tau criterion is a modification of a method known as data snooping,...
Market Opportunities for Geospatial in 2017
Construction Prospects, Part One As we start a new year, it seems only fitting to take a look at what 2017 might hold in store for us. Let’s start with construction: a major source of income for the geospatial profession. Dodge Data & Analytics publishes all types of data for the North American commercial and...
App Happy: Streaming Utility Surveys
A new app standardizes workflow by turning a list of surveyed points into underground 3D utility maps. Imagine that you’re surveying an underground waterline in your city. You use your survey devices to record the locations of the pipe system, including the manholes, the water valves, and their depths. Using your tablet on-site, you’re able...
GIS Technology: Get It Surveyed
As I approach my 30th anniversary of being a licensed professional land surveyor in California, I can’t help but think about how things have changed over those years. One word: Technology. It has changed everything. For me, it started with EDMs, then total stations. Handheld calculators were emerging. When the HP 41-CX came out, that...
Boom Behind/Boom Ahead: Millennials & Surveying
The outlook for surveying and geospatial services may soon swing up significantly, and being prepared may depend on paying attention to simple demographics. Generational shifts will dictate the types and magnitude of needed services and our ability to attract new practitioners to surveying and geospatial professions. Of course, the future is impossible to completely predict,...
Finding Your Voice & 40 Under 40
DON’T MISS XYHT’S OUTLOOK 2017, the 40 Under 40 (40 < 40) special issue. You have there a valuable resource. Be prepared to visit the future of geospatial: featured are the upcoming leaders of our profession. Unless you are lucky enough to have one of these individuals on your staff, they are your competitors. If...
