All posts by Nicholas Duggan FRGS Cgeog (GIS)

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...

Kevin Sheehan

Back to the Future

An Interview with the hand-drawn map creator, Kevin Sheehan There isn’t much you can’t do with digital media nowadays, from effective maps using shadows and drop effects to using graphic-design packages to make the map “pop”—except for one thing—capturing that hand-drawn style, the way that the pen line moves in and out from the pressure...

flight-paths for wind farm analysis ArcGIS

Vertical Transformations and GIS

You know those moments where you are sitting in a pub, the office, or at a friend’s house and you say something, then suddenly wonder why you haven’t thought of it before? I had that very issue in the Brew Dog pub near Spitalfields in London, UK a couple of weeks ago. You see, I...

Map

Map Making: “Can I have a map?”

“Can I have a map?” How often do you get someone ask, “Can I have a map”? I have nothing against making maps; in fact I like it so much that I have made a career out of it. Not just any map either, I’ve made maps for the nuclear, environmental, government, renewable energy, offshore...

Datum Transformations

Using OSTN15 with QGIS

As you may be aware, the United Kingdom has a new transformation model that is OSTN15. But why? What does it mean to the geospatial community? Without being too nerdy, tectonic plate movement means that the “model” surface (the geoid) is slowly moving away from being the best fit for the coordinate system. It has...