Cholera, Spatial Thinking and John Snow: Soho 1854

A particularly bad outbreak of cholera in Soho in 1854 led one man to identify contaminated water as the mode of transmission and apply one of the most famous instances of spatial thinking. At a time when the fledgling Canterbury colony was getting itself sorted out, the London of 1854 was a stinking, festering hell-hole.  Growing from the tiny […]

LiDAR Data – Thousands of Tiny Luminous Spheres

This post covers the basics of LiDAR data and how very high resolution DEMs can be derived from LiDAR data. With an appropriate nod to The Bats, we’ll cover LiDAR data, which, while sort of luminous but not spherical, are certainly tiny and numerous.  Thousands is a HUGE underestimate.  LiDAR is a form of remote […]

Getting Consistent Symbology with Layer Files

This post covers how you can get consistent symbology across several layers using layer files. So the good people in ERST310/607 have been doing some fun analysis lately (though they may disagree), getting some high-resolution elevation models from LiDAR data (more to follow on that topic).  Using three separate datasets, they’re creating DEMs for three […]

Trekking the High Himalaya for Data

This post covers how a range of different remotely sense data sets can be acquired from around the world with a focus on Nepal In a recent post, we looked at how Open Street Map can be used to acquire some basic geospatial data for many parts of the world.  When we left off, we […]

Opening Up Open Street Map

This post gives some background on Open Street Map, an open source, crowd sourced alternative to Google Maps.  We also cover how data can be downloaded and used for analysis. A key aspect of our postgrad GIS courses is an independent project, where students formulate their own projects to ensure they develop some analysis skills in […]

GIS in Action – Crowd Sourced Mapping of Earthquake Impacts in Nepal

This post looks at how GIS is being used in a crowd sourcing way to respond to humanitarian needs around the world.  Recent event in Nepal have been eerily familiar – many of will know what it’s like living in the shadow of aftershocks and the long road ahead.  There are lots of ways we […]

Home on the Range

In this post we’ll cover the ins and outs of creating home ranges for animals based on point locations.  This was mainly written as a tutorial for Ecology students but by all means, feel free to have a go. In animal ecology there’s an important concept around home ranges for animals, which could be thought […]

Spatial Aspects of Gallipoli – the Landings at Anzac Cove

This is the second of two posts on Gallipoli.  The first set the scene for the landings at Anzac Cove on 25 April 1915.  In this post, the spatial aspects of the landing are covered in more detail.  Warning: the account here may differ from a traditional telling of the event. In part 1 of […]

Spatial Aspects of Gallipoli – The Big Picture

This is the first of two posts related to the Gallipoli Campaign.  In this one we’ll talk about the importance of Gallipoli in World War One while the second will look at the ANZAC beach landing. I’m no war buff – far from it.  But there are a few military events that have really captured […]

How To Add a Locator Map in ArcGIS Pro

This post details how to add a locator map (or inset map) to a layout in Pro (updated May 2021 for Pro). Map making is part art, part science, but mainly art, in my humble opinion.  It’s often the case that you’ve done the hard yards with analysis and, in the critical map making phase, […]