Today is the third session in our five session introduction to urban modelling and simulation. This will be about land use models and how we construct them from elements of spatial interaction submodels. And I will illustrate a worked example. But please read last weeks lectures Lecture 3 and Lecture 4 because we didn’t finish them and they are key to today – Skim them before the lecture if you can – Lectures 5 and 6 are posted on the relevant pages. The image on the left is from an old cover of Byte magazine – which was ‘the’ computer magazine in the 1980s. It had countless images comparing computers to cities and city blocks, a fact that resonates strongly now with the idea of smart cities, another theme on this blog that is yet to be developed as a course of lectures.