July 2006
Monthly Archive
Tue 25 Jul 2006
Whew!! 4 days to the wedding, Floyd Landis won the Tour De France, and I took second in my biggest race of the year!
Here is something interesting from the Geowanking list:
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Call for papers - 2007 Association of American Geographers Annual Conference. 17-21 April 2007, San Francisco, California, USA. http://www.aag.org/annualmeetings/SF2007/
Google Earth as the ‘view from nowhere’: the spatial politics of high-resolution satellite imagery
Session organisers:
Chris Perkins and Martin Dodge
Geography, School of Environment and Development, University of Manchester
Context:
Google Earth, and various internet portals, offer ubiquitous high-resolution satellite imagery at unprecedented detail to a global audience through simple interfaces. The capabilities and technical beauty of Google Earth, in particular, has garnered wide spread praise and a rapidly growing fan-base. Given this impact, now is an apposite time for considered reflection on exactly what can been seen with satellite imagery and thinking through the spatial politics of newly accessible images of the world.
Pictures taken from satellites orbiting high above the Earth offer people a seductively objective view of the world below, termed by Thomas Nagel the ‘view from nowhere’. This mirror-like viewpoint over territory, has until recently, been for the most part the preserve of military forces and states have jealously guarded their visual power in the interest of national security. But recent technological and social change has led to increasing spatial and temporal data resolution becoming much more widely available, in large part because the ‘mirror’ is being commercialised, and significantly access through the internet portals seems to be offering a means of challenging the power of the formerly elite discourse.
We invite theoretically informed analysis that questions the ontological surety of satellite imagery.
Suggested themes:
# Explore the tensions between transparency and secrecy that percolate debates about access to high-resolution satellite imagery.
# Reflect on the potential for progressive use of imagery by non-state actors to challenge established power relations.
# Examine the politics of socio-technical infrastructures and corporate practices that underpin image dissemination, censorship and manipulation.
# Critique the naturalizing power of the interfaces to systems like Google Earth, particularly in relation to the military origins of these systems.
# Question the uneven spatial provision of imagery and the commercial logics of points of interest databases.
# Analyse growing mass media use of high-resolution satellite imagery.
# Evaluate alternative visualities from artists who employ the ‘view from nowhere’ to problematize relations between subject and object.
# Interrogate notions of satellite ethics, particularly relating to individual privacy and community rights.
# Situate the potential of progressive pedagogy employing high-resolution satellite imagery.
# Assess the cultural meanings attached the imagery and the nature of the new community of practices emerging (such as ‘black helicopter’ spotters).
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Proposed papers in the form of a title and short abstract (250 words
maximum) should be submitted to Martin Dodge (m.dodge@manchester.ac.uk) by 15th September 2006.
Further details on the paper requirements and registration for the AAG meeting are at http://www.aag.org/annualmeetings/SF2007/call4papers.cfm
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Wed 19 Jul 2006
Although I have read that the first rule of blogging is not to apologize for infrequent posting, I’ll do it anyway. With helping my fiance plan our wedding (10 days away!!!), the Tour De France, and the height of my racing season all coming together, plus a 9-5 work week, GIS and Archaeology has suffered. I guess it is good to give the blogosphere a small break from the controversial and tantalizing subjects of artifacts and computers 
Posting will be back to previous standards in the near future.
And now, something completely different…
Having nothing to do with archaeology, I found this post/tutorial very interesting. From back in January (I think it made the rounds back then) Tom at Applefritter.com posted his technique for data mining Amazon.com wishlists to find the address of people asking for potentially “dangerous” literature. In his very interesting and cheeky post, Tom outlines a involved methodology to extract all 260,000 wishlists and ultimately create a Google Map of reader locations (for his post, he extrapolated the address locations to town centers).
If not just for the information on federal data mining and Tom’s take on it, this post is very intriguing. Following his technical methodology, Tom seems to be somewhat of a scripting MacGyver; quite impressive.
For an interesting diversion, check it out!
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Fri 14 Jul 2006
Apparently this web map is a few years old (initially from 2002/2003), but I have just run across it for the first time and I think it still has great value.
I-Sites: An Archaeological GIS and Database for Iowa Archaeology is created from a group project of the National Park Service, University of Missouri-Columbia, University of Iowa, and Iowa State University. I-Sites is an ArcIMS served WMS which displays the archaeological site density and various base layers across the state of Iowa. Al thought site location information is aggregated into 1 mile square areas, access alone to such information is a great find. Plus, this service is offered free with no registration. Although, the timeliness of the data is unknown. Some states, such as Maryland have aggregate archaeological site data available, but only a a price.
The I-Sites WMS first has a search interface where you can query the map by county, USGS quad,Township and Range description, or click on the image map. The ArcIMS application launches from here. Having seen a decent number of IMS implementations in the past, this one seems pretty darn solid. The panning, zooming, and display are all pretty clean.The display is base layer data (major roads, towns, quad grid, watersheds, etc…) and the one mile square units shaded appropriately for their archaeological site density. There is a data query box available to find 1mi^2 units that fit certain criteria. All in all, there are not many bells or whistles, just a solid WMS that tells you what you need to know.
If you doing any planing or research in Iowa, I can see how this would be a valuable starting point.
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Wed 12 Jul 2006
This is a question I get every so often and the short answer is “Yes”, but finding one can be a
challenge. With an increasing number of GIS savvy archaeological students graduating from college and looking to apply their art to the trade, GIS specific positions are in demand.
Knowing that a few students have landed on this blog, I though I would say a few words and compile a list of links that are a good starting point for the job search.
Job Fields
Within the broad field of archaeology, there are a number of settings that employ GIS techniques to archaeological data sets. In the US, most of this work is done in Cultural Resource Management firms in the private sector. These firms range in size from small shops to branches of large engineering firms. Each end of the spectrum has pros and cons. The GIS work in a CRM firm can be very monotonous at times, but new projects are always around the corner. If you don’t mind filling your time with repetitive database management and computer cartography, punctuated with cool analysis projects, CRM could be a good fit.
Academic departments are also a good place to wow our colleagues with archaeological algorithms and ancient analysis. Many archaeology departments have their token professor who uses GIS. Some departments are much more in depth and specialize in GIS in archaeology. Though chances are, if you are looking for a professor position, you know the challenges that are ahead of you. If I had the endurance to stick it out for the PhD., becoming a prof. would be ideal.
Museums and non-profit foundations are also a place to look for positions. Often times, these positions are based on specific projects and grants, so longevity may not be in the cards. Thought, arrangements such as this can lead to an impressive resume of very interesting projects. High variability in the pay scale and high turnover make this a demanding setting, but great data sets and interesting projects could make it very rewarding.
Finally, GIS is also applied to archaeology at the State and Federal government level. Each state has a State Historic Preservation Office [SHPO] (or something similarly named) that advises other agencies and private companies on archaeological regulations and acts a the repository for historic and archaeological data for the state. Many of the SHPOs I am familiar with have at least one GIS person if not more. SHPOs have a tremendous amount of sensitive data on their hands and many people who need access to it. Not wanting to be the bottle neck, many SHPOs across the country have and are making attempts to automate data access. This process, for most SHPOs, is a huge undertaking transforming dozens of paper maps and thousands of forms to databases and web front ends, a process that takes years. Landing in one of these positions provides great project experience and offers insight into the working of the political world.
Job Skills
Archaeologists in general are skilled in many different fields. An archaeologists needs to know bit about pedology, geology, geomorphology, biology, chemistry, geography, and beer-ology to name a few. Working with computers in archaeology is no different. Many positions are as much computer generalist as they are GIS person. Be prepared to format reports, create spreadsheets and DBs, fix a computer, run a GPS, hack your outdated software, and most importantly, create your boss’s Powerpoint presentation. Further, many GIS archaeologists are also archaeologists and therefore required to swing a shovel when they are needed. Although digging the frozen much on the side of New Jersey highway in January sucks, sometimes taking a break from pixels is a good change of pace.
Links
As a preamble, I think it is important to emphasize that connections, networking, and personal commendation or more likely to land you a job than blindly sending emails. Try giving a phone call to local CRM firms and museums; often times, websites are way out of date and you could get the jump on an open position. What’s the worst that can happen?
The list below is somewhat organized. I am sure there are plenty more resources out there, so if I am missing any, write a comment or email me.
General Info:
Archaeology Job Postings:
List of SHPOs and CRM Firms
Some UK GIS Job sites (Thanks to Steve White)
Some Academic Departments with GIS/Archaeology
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Fri 7 Jul 2006
“Uncovering progress in FOSS-based archaeology“, by M. Fioretti, in the title of an article published the other week in the trends section of NewsForge, the online newspaper for Linux and Opensource. If you are out of the know, like myself, FOSS is an acronym for “Free and Opensource Software”
As detailed by the author, archaeologists, with our large quantities of data, mapping needs, and repetitive analysis, are well suite for computer applications, but often, this usage does not extend beyond fancy PowerPoint slides. Community based, open and accessible software, as a model, is finely tuned to the needs of low budget institutions that desire to apply archaeology’s fundamental quantitative methods and replicate the analysis of others.
“Archaeological research is based on replicating and analyzing what others have done. That requires unrestricted access to both data and algorithms used to generate or process them — a philosophy that plays well with free software.”
As the author continues, they describe a few FOSS software packages that work well with the data and analysis requirements of archaeology. Software such as BRL-CAD and SAGA-GIS are mentioned, as well as, ArcheOS; which has been covered on GIS for Archaeology. Citing a presentation from the Arc-Team, at the GRASS UC in Genova 2006, Fioretti links to a presentation [pdf] and details the use of the Voxel graphic technique using GRASS and Paraview. This method gives the archaeologist the ability to recreate an excavated context and analyze specific attributes based on a 3D model. This is a very cool technique!
Discussion
The author hits the nail on the head by stating that “the biggest obstacle to open archaeology is data, rather than software.” As discussed here and elsewhere, archaeological data is extremely guarded by many researchers as well as government and private entities. In many states, there are very strict laws about how archaeological data can be displayed and distributed. As contract archaeologists, we are unable to share our data without the express permission of those who pay us to gather it. Even beyond that, once the data is submitted to the State Historic Preservation Office, the state laws take effect. Replicating complex analysis based on the available legal means of displaying, sharing, and transiting data rarely works. Most of the published information that archaeologists use to build their models has to be taken at face value because validating underlying data and methods is usually impossible For reasons such as this, archaeological literature is full of legacy errors that will never be overcome. Okay, I may be going a bit off topic here, but the point is, data availability is the gorilla in the room. Suggested by Fioretti, license agreements such as Creative of Science Commons could foster a more open archaeological data community, but a true fix requires much larger efforts. In the US, this would mean changing laws state by state and convincing archaeologists that sharing data within the community is a good thing.
This was a very refreshing article. The author is very astute in their understanding and description of the problems with the adoption of more open data sharing and computer techniques within the field. Further, the article provides a number of links to FOSS and archaeological software and products which may be of interest.
With the major tenants of the issue outlined, this article encourages the reader to think about how current movements in the FOSS community can be translated to the unique requirements of archaeological data. The gears of change are in motion.
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Wed 5 Jul 2006
Sorry for the lack of posts over the 4th of July Holiday. My favorite fishing spot does not have Wi-Fi
Back to the posting…
This is the title of a recent thread on the Online Archaeology forum that has drawn a great response with some interesting observations.
The Discussion
The thread started innocently enough with a few folks asking about applications of GIS in archaeology, if it is valued, and whether it is worth while to take a class in it. As with the Online Archaeology site, many of the responses and view points here are from the UK.
Initially, many responses stated that they have used of heard of GIS in archaeology here and there, but overall it was too expensive. User AntArch, came to the table with the first informative response clearing the air of some misconceptions and describing more the essence of GIS, how it can be used in archaeology. Citing the lack of university training, lack of exemplar data sets available, and resistance from the contract/professional units due to time and cost, AntArch ultimately agreed that, yes, GIS is undervalued in archaeology.
A number or responses back and forth generally agreed that GIS is a very powerful tool for the archaeological tool chest, but often unused because of the real or perceived notion that is is too expensive, there is a lack of trained users and a confusion about what the “GIS” is and what it can do. To me the latter seems like a major reoccurring theme.
Then the discussion got very interesting! From the pleasant banter of general agreement, user “Snooks” words cracked like thunder (that may be a bit dramatic, but…)
“I am in a key IT position in one of the major contractors in the UK… I can tell you I have not seen GIS used in commercial archaeology. Too expensive and too time consuming…We want jobs to come in fast and reports to go out fast. No time/money to waste on GIS analysis.”
Well, that was one hell of a statement. AntArch followed this is a well crafted response expressing dismay for Snooks point of view and arguing the basics of what contract archaeology is all about. Not that this is the topic of the discussion, but Snooks obviously brought it into play with his/her statement. Snooks and AntArch had it our back and forth, with Snooks taking the business is business hard line. Snooks goes so far as to say that commercial archaeologists fain a desire to be academics, but we “inherently” cannot because of our pursuit for the almighty buck (or 0.781933 euro). After a few volleys, Snooks conceded that ideally, collecting “GIS data” is the proper and ethical thing for archaeologists to do, but in this business climate, it won’t fly, so don’t bother getting training because it won’t get you a job. I’m glad no body told me that when I was in school!
The responses that followed were all in support of AntArch’s pro-GIS position. Mostly stating that they too work for a commercial company using GIS practices on nearly all projects. Further, these responses addressed the common gripe of too much money and time and encouraged students to take a look into GIS as an addition to their studies.
The Conclusion
Although Snooks dollar-first-archaeology-later attitude was abhorrent within the forum, it certainly opens a can of worms that is right for the picking. When GIS techniques and practice is so evidently useful to archaeologists, what is the barrier that keeps it from common acceptance. As shown, time/money is the most often cited reason, but is it more of a contract vs. academic problem, or is it just a lack of understanding of what a GIS point of view is capable of?
It seems to me that the misunderstanding of what “GIS” actually IS causes a rift which trickles down to create the subsequent issues. Surely, I am no GIS prophet who claims to “get it”, but I have dealt with GIS and Archaeology enough to see the bigger picture. Within the forum discussion, the term “GIS” is often batted around as a commodity; a thing you have or do not have, GIS either is or is not. Of course, GIS is not a singular thing, rather a collection of things composed into a system that has objects and properties. The classic analogy is GIS as a toolbox. Tools can be used in different ways to solve different problems. To know how to address an issue, you need to know your tools. GIS is endlessly scalable. GIS tools can be used in an archaeological project from the level of visualizing GPS points, a quick aerial/satellite overlay, or complex model building and analysis.
Within the forum, the “too expensive” argument for GIS is put in it’s place by suggesting the numerous open source / freely licensed GIS programs (See a recent post by Mapz the GIS librarian). As far as the “too expensive” argument applied to training personnel, I am sure one could find a GIS knowledgeable intern or entry level archaeologist for a low price. I was one of those for a number of years and I know there are plenty more out there. The computer skills needed to learn your way around a GIS are not for beyond the basic skills most college kids already have. I would stress that a back ground in Geography and GIS theory is as important, if not more so than computer skills, but getting your foot in the GIS/Archaeology door does not have to be costly.
The discussion on the Online Archaeology Forum is a very important discussion for Archaeology and a whole. The replies give good insight into the level that GIS has permeated archaeology and has become (or not become) an accepted tool. The topics raised by the simple title “GIS; Undervalued in Archaeology?” go far and wide beyond the use of GIS in archaeology. I hope this discussion develops as time goes on.
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