All posts by Nicholas Duggan FRGS Cgeog (GIS)

OS Zoomstack – the Gift that Keeps On Giving

On July 17 2018, Ordnance Survey (OS), the United Kingdom’s national mapping agency, released a trial of a product called “OS Zoomstack.” At the time many overlooked it, as Ordnance Survey makes lots of their data over 1:5000 available for free. I have to admit I was one of them.  In August of last year,...

Where on Earth Is the Offset in ArcGIS Pro?

Life used to be nice and easy for us GIS guys. We used to roll out of bed, click start on our GIS software, go back to bed for an hour, and then think about making a nice simple 2D map. Then, all of a sudden everyone starts talking about 3D GIS and being able...

What’s within a 30-minute Walk – Revisited

I recently had reason to be in London for a short meeting and walked past London Bridge, looked at the sky around me, and thought, “I wonder how accurate that map I made last year is?” I was fortunate to have my camera phone with me so that I could take a few pictures. The...

What Is Esri?

Over the last few years we (at xyHt) have discussed Esri as an industry-leading GIS many times, but what is it? What is ArcMap, ArcGIS Pro, or any of the other things with “Arc” names? The truth is a little confusing, but at the same time a little clever. In this blog I hope to demystify...

Ben Flanagan

Interview with Esri’s Ben Flanagan

Ever wonder who makes those maps you see in the newspaper? Ben has made maps for the Telegraph, the Guardian, and BBC News, and best of all (to me) he’s from the UK! Ben is like a ninja—not many people know about him but those that do are avid fans of his work. It was...

3D Cities from a Single System

Above: This screenshot is of CityMapper output. A look at the hybrid airborne system that combines lidar with oblique and nadir imagery. Over the last five years I’ve built and used a lot of 3D GIS and BIM models. Almost all of this has required the capture of stereo imagery and oblique imagery and a...