All posts by Nicholas Duggan FRGS Cgeog (GIS)

Newlyn Harbour Lighthouse

Dealing with Vertical Datum, the Mariners’ Way

Before 3D GIS, we were able to measure miles below the sea and miles beyond our own atmosphere to a great level of accuracy, so how did we do it? There are a few methods for working between vertical coordinate systems, but the one I want to discuss is possibly the simplest, not always the...

FIGURE 1.tif

Surveying a Mile Down

This entry is part 6 of 8 in the series June 2017Above: The metrology viewed as a combined model. A 3D surveying company provides highly detailed lidar data on subsea drill centers. This article almost didn’t happen. I first met with ADUS DeepOcean in January 2017, when we discussed how they had captured high-resolution laser data...

geobiz2

GEO Business 2017

This entry is part 1 of 1 in the series GeobusinessNicholas makes the annual pilgrimage to GEO Business for xyHt This blog is going to start with a short piece about skips. If you are afraid of skips (skips are what you’d call “dumpsters” across the Atlantic), turn away now …. Monday morning and 24...

edf

Ocean Business 2017

Last week, April 4th – 6th, one of the largest gatherings for the offshore industry took place, Ocean Business, in Southampton, UK. The bi-annual event is a large deal for the maritime industry. When I say large, I actually mean huge; there are over 350 exhibitors from 26 countries and 166 training and demonstration workshops...

GoogleEarth Multipatch

Multipatches, Point Clouds and Meshes

A Guide to 3D GIS Data Formats Moving your GIS to 3D is a daunting task. Not only are there all the vertical issues to take into account, but also a whole new world of jargon, which can, at times, be quite overwhelming. In this post you’ll find a few of the data formats that...

Nearmap high-resolution aerial imagery of the Hoover Dam at 2.8" GSD.

Converging Worlds Data, Imagery, and the Pipes Below

This entry is part 6 of 9 in the series March 2017Above: Hydromax USA data (sewer and gas) is combined with Nearmap imagery and Esri software, improving analysis and resource deployment. A data-collection company transforms its services with clear, streaming imagery. By Nicholas Duggan, FRGS, Cgeog (GIS) When you get new aerial imagery, the first...