Tag Archives: spatial analysis

New Spatial Humanities Website

28 Aug


Hi guys,
Just a quick post to tell you about the new website I developed for my current project, Spatial Humanities: Texts, GIS and Places.
You can access it here and it contains all the information and news on the use and development of new GIS methodologies for the analysis of texts.
Although I am working with the History department and Literature at Lancaster this is quite exiting as it is opening new great possibilities also for historical archaeology. I’ll keep you posted on the progress we are making and please feel free to contact me anytime ūüôā
Have a nice week!

Book: Thinking Beyond the Tool. Archaeological Computing and the Interpretive Process

15 Feb

Hey guys,

Just a quick note to let you know that our book ¬†“Thinking Beyond the Tool: archaeological computing and the interpretive process” (cover by Javier Pereda) is already in press.

The idea of putting together this book was inspired by the¬†session ‚ÄėThinking beyond the Tool: Archaeological¬†Computing and the Interpretive Process‚Äô, which was held¬†at the Theoretical Archaeology Group (TAG) conference¬†in Bristol (17-19 December 2010). The book postulates that archaeological computing has become an integral part of the¬†interpretive process¬†for inquiring and disseminating the past and includes:

  • 12 theoretically informed chapters on a variety of computational methodologies used in archaeology and heritage
  • an introduction by the editors (Costas Papadopoulos, Angeliki Chrysanthi and myself)
  • a commentary by Jeremy Huggett
The book will be out by the end of March and those of you coming to the CAA2012 keep an eye for it at the¬†Archaeopress¬†stand! Many thanks to all those ‚Äď both authors and reviewers-¬†who have¬†contributed to this!

How to extract the values from Time series data in Idrisi

15 Apr

Hello guys,

Time series data

With GIS you can explore a series of rasters depicting  the same geographical area through time, analyzing how an specific element or attribute changes. This is one of the purposes of Time series data. So, the other day I exchange a series of interesting emails with Idham Khalil from the Geography Department here at uni about how to extract and compare the values from a series of images.

If you have only few images, one way to compare two rasters is to subtract  one image from the other to see the changes through time, but of course it depends on the question you need to solve. On the other hand, if you have plenty images here is the solution to which Idham arrived using Idrisi Taiga:

Let say you are working with time series data and have hundreds of images(layers). And you want to find the behaviour of one pixel/polygon over times. One way of doing it is using earth Trend Modeler module in Idrisi Taiga. Load all the images in earth trend modeler and make them a raster group.Then go to Explore Temporal Profiles. This will generate a time series curve of certain pixel/region depending on your objective. Right click on the graph produced and …copy to clickboard as text(data only). Bingo….you will have the values of all those years.

As always, I deeply enjoy these conversations with other people so if you have something in mind that we can discuss regarding technical or theoretical issues behind GIS, please feel free to contact me ūüôā

Happy modelling!

Antes de los mapas: navegaci√≥n y orientaci√≥n terrestre en la Prehistoria Reciente Ib√©rica

25 Mar

Hi guys, I just published recently a short article about terrestrial navigation, orientation and wayfinding during prehistory.

The article is in Spanish and is intended for a wide audience, but if you are interested in these matters, let me know, as my research deals precisely with all this ūüôā

Patricia Murrieta Flores, David W. Wheatley, Leonardo García Sanjuán (2011)
Antes de los mapas: navegaci√≥n y orientaci√≥n terrestre en la Prehistoria Reciente Ib√©rica.¬†PH: Bolet√≠n del Instituto Andaluz del Patrimonio Hist√≥rico, A√Īo n¬ļ 19, N¬ļ 77, p√°gs. 85-88.

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