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Formalization Matters: Critical GIS and Ontology Research (Schuurman, 2006)

20 November 2017 - 1:29am
This paper examines the reasons for the necessity of critical GIS in terms of formalizing the representation within GIScience. In other words, the author emphasizes the ontology research in GIScience. It is a fundamental and critical question when thinking about ontology. For critical GIS that concerning the influence of GIS in human and society, have […]

MacEachren – Visualizing Geospatial Information Uncertainty

20 November 2017 - 12:21am
Uncertainty relates well to the topic of critical GIS in the sense that it challenges the foundation of the process. However, it differs in its specificity to what is being deemed uncertain/what is being challenged. In this case we talk about error, accuracy and precision from results and data while assuming that the core concepts […]

Visualizing Geospatial Information Uncertainty (MacEachren et al, 2005)

20 November 2017 - 12:18am
This paper reviews the studies about conceptualization, representation of geographic information uncertainty, as well as its influence in decision-making process. Some typologies are reviewed and the author proposed a more comprehensive one. However, the explanation of each components in the typology is not so clear. For example, when explaining “interrelatedness”, the author uses an example […]

Critical GIS – Schuurman 2006

19 November 2017 - 11:34pm
Critical GIS allows us as users of GIS to better understand how it works and relates to the world around us; how theory’s  are manifested in space, how knowledge is coded, how easy it is to skim over things, and what i think is most important is the validity and praise that we give to […]

Thoughts on McEachron (2005)

19 November 2017 - 4:16pm
This paper discusses the ways in which uncertainty may best be quantified and then presented to decision-makers. As shown in one of the exercises in the paper with students tasked with choosing the new location of certain parks and airports, the ones that were exposed to the best uncertainty visualization methods typically made the best […]

Thoughts on Schuurman (2006)

19 November 2017 - 4:00pm
I’m unfamiliar with the field of critical GIS, but the divide between “real-worlders” and their critics is apparent in fields beyond GIScience. If there are so many voices of complaint about how knowledge representation reinforces power relations, those critics have to join forces with those developing ontologies and epistemologies. Ten years have passed since Schuurman’s […]

Roth (2009) Uncertainty

19 November 2017 - 2:50pm
Uncertainty is a topic that I’ve always wondered about in GIS, especially when classifying an area from a raster grid that inherently has to have error if each pixel spans 30m squared in most LANDSAT images and DEMs. I was intrigued to find out uncertainty is an academic subject in GIScience literature, as well as […]

Critical GIS and Ontology Research, Schuurman (2006)

19 November 2017 - 12:26am
The Schuurman (2006) article presents the emergence of critical GIS, criticisms of early GIS research that necessitated its conception, and its importance to the discipline of GIScience more broadly. It was interesting to get a glimpse of how critical GIS relates to a number of GIScience topics we’ve already begun to cover, and I think […]

O’Sullivan – Geographical Information Science: Critical GIS

18 November 2017 - 7:37pm
I found this paper quite interesting and I found that it gave an adequate summary of the prime factors constituting the strands of debate in Critical GIS. I found the discussion over the acceptance of critical theory in the GI Science community quite surprising, with the seemingly flippant responses to the Ground Truth collection that […]

Thoughts on Roth (2009)

18 November 2017 - 7:30pm
The concept of uncertainty rarely occurs to me when looking at a map. In Roth’s article, he frequently refers to the visual representation of geographic information uncertainty, but doesn’t explain it in detail or give examples. He describes the different typologies of uncertainty categories from the literature. Roth makes a case for McEachren’s typology of […]

Visualizing Thoughts on Geospatial Information Uncertainty: What We Know and What We Need to Know (MacEachren et al.)

18 November 2017 - 6:11pm
The authors offer a clarification early on in the paper which I found useful; “When inaccuracy is known objectively, it can be expressed as error; when it is not known, the term uncertainty applies “. This definition sounds like it pertains to measurement, but I don’t know how one would distinguish between error and uncertainty […]

Thoughts on “Geographical information science: critical GIS” (O’Sullivan 2006 )

18 November 2017 - 4:05pm
We have discussed the importance of terminology in previous weeks, and O’Sullivan hints at the elusive nature of capturing a phenomenon when he states the topic of his paper as the “curious beast known at least for now as ‘critical GIS”. (page 782) He further states that there is little sign of a groundswell of […]

Uncertainty in floodplain mapping – Roth 2009

18 November 2017 - 3:31pm
Roth (2009) presents the results of a focus group that was conducted to learn about the role of uncertainty in decision-making processes relating to floodplain mapping. Due to this focus on floodplain mapping, uncertainty was largely discussed in the context of knowledge communication. Such a cartographic focus often conflated abstraction with uncertainty and discussed ways […]

Thoughts on Roth (2009)

17 November 2017 - 4:50pm
I found this paper by Roth (2009) fascinating for multiple reasons. Firstly, my undergraduate thesis research involved making a map of sediment distribution in water ways, which I collected with a sonar and dGPS. There were multiple layers of uncertainty, mainly relating to error potential in the data collection (from the sonar and the dGPS), […]

OSullivan 2006: Critical GIS

17 November 2017 - 3:31pm
I found this article on critical GIS quite interesting, and very relevant to our topics in GIS ranging from VGI to PPGIS. This paper acknowledges the large gap in the GIScience literature pertaining to social theory, which I find is a very important idea to keep in mind especially when assessing papers in GIS literature […]

O’Sullivan (2006) and Critical GIS

17 November 2017 - 12:53pm
O’Sullivan (2006) begins by highlighting the divide between social theory and GIS that critical GIS attempts to bridge. This article provides a brief overview of the field of critical GIS with respect to the topics such as feminist GIS, PPGIS, privacy, and ethics. In my opinion, this article did an excellent job of exemplifying the […]

On Roth (2009) and Uncertainty

17 November 2017 - 12:32pm
It was super interesting to learn about the differences between certain words that, outside of GISci/geography/mathematics, are often equivalent, like vagueness, ambiguity, etc. Knowing more about McEachern’s methodology would have definitely been helpful, but I’m looking forward to hearing more in Cameron’s talk! I thought it was weird that their central argument about uncertainty was […]

Some thoughts on Schuurman (2006)

16 November 2017 - 10:11pm
I bring this up in many of the blog posts that I write, but it truly amazes me how much I learn about the inner workings of GIScience every week in this class. During his talk on critical GIS for GIS day, Dr. Wilson mentioned how too often critical GIS is a lecture tacked on […]

Optimal routes in GIS and emergency planning application (Dunn and Newton, 1992)

13 November 2017 - 12:37am
This is an old paper presenting two algorithms (i.e., Dijkstra’s algorithm and out-of-kilter algorithm) for shortest path calculation. The different is that out-of-kilter algorithm can tackle the problems with flow control. This is useful in many situations such as transportation. And as the authors note, it is still far from the reality if we apply […]

VGI and Crowdsourcing Disaster Relief (Zook et al., 2010)

12 November 2017 - 10:55pm
This paper mainly reviews the applications of four online mapping platforms in Haiti earthquake in 2010. It cannot be denied that the four platforms (i.e., CrisisCamp Haiti, OpenStreetMap, Ushahidi, GeoCommons) contribute to disaster relief in the earthquake. However, these technologies also bring problems remain to be discussed and further solved. Primarily, in the beginning parts […]