Exploring the Historical Determinants of Urban Growth Patterns through Cellular Automata

Kiril Stanilov has adapted RIKS METRONAMICA, an established cellular automata (CA) modelling system, to simulate the historical growth of a section of a large world city. The focus is on simulating change from the late 19th century until the modern …

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Weather Underground

I’ve been looking at the Weather Underground API (http://wiki.wunderground.com/index.php/API_-_XML) which gives access to the observation stations and the data they are collecting. The API uses simple commands to query for a list of stations, for example: http://api.wunderground.com/auto/wui/geo/GeoLookupXML/index.xml?query=london,united+kingdom Using C# and .net, this is accomplished as follows: WebRequest request = WebRequest.Create(string.Format(GeoLookupXML, @”london,united+kingdom”)); HttpWebResponse response = (HttpWebResponse)request.GetResponse(); XmlDocument […]

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Network Population Density for Southwark

Using the excellent SANET extension for ArcGIS 9.3 I was able to take some of my data for Southwark that I had geocoded to address level, and estimate the population density using the OS Mastermap ITN product. The procedure is essentially a Kernel Density Estimation that takes place on a given network rather than across 2D space, this effectively controls […]

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Visualising Public Transport Networks

With the increasingly widespread availability of transport data, we can now visualise and explore new dynamic geographies of urban transport flows and networks. In this post, I show detailed animations of UK multi-modal public transport networks using timetable data. This …

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Global Migration Maps

Migrations of people have existed for millennia and occur at a range of scales and time-periods (from small-scale journeys to work through to intercontinental resettlement). As a geographer I have long been interested in these and thought it was about time I mapped them! Using data from the Global Migrant Origin Database (thanks Adam for the tip) …

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Flattening the Earth

Flattening the Earth so that it can be easily drawn on a 2-dimensional surface is complicated. Over many years map projections have been developed to aid in this process, but they can only really estimate (albeit very accurately) the shape and dimensions of things on the Earth’s round surface. Whilst it is important to understand …

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A Week in the Life of a Tile Server

Recently, BBC Look East have been running a “Broadband Speed Survey”, asking people to use an online tester to check their broadband speed, and then enter the value, along with their postcode, into SurveyMapper. This generated 16,311 responses to the survey, but for each response people get to view the map containing the latest data, […]

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World Transport Links and US Climate from The National Geographic over a Century ago

Following my previous post I have been digging around archive.org for interesting spatial/ geographical related resources. A search for “geographic” yielded a number of back issues of the National Geographic Magazine. They date back as far as 1888 and contain some great images and maps. There are some real gems to be had, such as …

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Automated Cartography: The urban expansion of Lansing

I hadn’t seen this video before. It demonstrates one of the earliest attempts at automated cartography for the display of time with spatial data. Truly ground breaking,  the video shows the urban growth of Lansing at 5 yearly intervals from between 1850 and 1965 and was produced by Allan Schmidt at the Michigan State University Urban …

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