Archive for the ‘506’ Category

Spatializing Social Networks

Monday, September 21st, 2015

In “Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles”, Radil, Flint and Tita describe the current academic understanding of embeddedness and how it was integrated into their study of geographic gang violence in an LA neighbourhood. I liked this study because while the idea sounds intuitive when explained, it shows a clear advancement in the field of space conceptualization.

The exclusionary vernacular used in the theory section was something that could have been improved upon. However, the neighbourhood gang violence provided more clarity to the topic and my understanding of the first section improved after the second full reading of the article. I like the concept of different types of embeddedness and especially the reference to Massey’s work and the idea that social networks are “stretched out over space” – a key finding in the subsequent gang violence study. The description of the CONCOR method was initially confusing but seemed like an innovative way to use quantitative methods to provide more qualitative results.  A potential follow-up could see if there were any new connections teased out by investigating the neutral or positive relations between gangs. I would also like to see how the final figure (6C) matched up to various locals’ perspectives on where gang territories were defined versus the formal census blocks. Finally, the specific acknowledgement of the study as a static view piqued my interest as to how temporal scales could be included in the future. Overall a thought-provoking read.

-VdeV

Spatializing Social Networks

Monday, September 21st, 2015

In Radil et al.’s Spatializing Social Networks (2010), the authors introduced an innovative method of integrating social network concepts of closeness and space with those of proximity and location called ‘structural equivalence’ (2010:308). A case study of rivalry and territoriality in the Hollenbeck Policing Area of Los Angeles was used to demonstrate how social network analysis can go beyond mapping of spatial networks (called ‘relational embeddedness’) of gangs in this area, but also the social positions of the gangs (also called the ‘structural position in network space’) within the Hollenbeck social network of gangs (2010:309).

Radil et al.’s publication achieves its goal of presenting to readers thoughtful (for 2010 at least) methods of incorporating the fundamental ideas behind sociological constructs of human interaction and social networks into spatial network analysis. I found the publication to have a thorough literature review of past forays into structural equivalence and concepts of spatial and social types of embeddedness, albeit difficult to understand at times, for readers unfamiliar with this geographic information science subdomain.

I found the Radil et al.’s Spatializing Social Networks to be an intriguing exercise in the harmonizing of social and geographical sciences. Most of all, I appreciated the authors obvious endeavour to use as much scientific terminology as possible (and very little tool-talk), in an effort to elevate geographic information science away from the simplistic ‘GIS is only a tool, not a science worthy of funding’ label.

The authors addressed a question that was raised in my mind as I was reading the article; that of temporal dynamism of spatial and social networks. I would be very interested to see how the CONCOR (convergence of iterated correlations) positional analysis would fair when a third, temporal dimension were to be added to the positional analysis. How would social constructs of space change over time? How would changes to the temporal resolution (i.e. scale) affect the magnitude of these changes? How could these results sway our understanding of Hollenbeck and the structural positions of gang network space?

-ClaireM

Spatializing Social Networks

Monday, September 21st, 2015

The article Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles by Radil et al. (2010) gives light to not only the relevance of the GIScience (though the authors don’t explicitly use the term GIScience) lens but also to its broad applicability for understanding social problems.  The authors first examine the idea of embeddedness, an integral theme of geography, and tie this to the gang’s territoriality and associated violence.  These two variables work very well for defining the social networks of gangs as their relationships are based on continuing rivalries.  I was particularly intrigued by how they used three splits of correlations analyses to quantify the relationships between territories; this has potential to offer increased surveillance of areas potentially considered hot spots as well as outlining areas for interventions.  By interventions I’m thinking of targeted anti-gang education and off-the-street programs for schools in the Region, especially since the school district was mentioned as one of the social factors separating the gangs in Hollenbeck from interacting with gangs in the rest of LA.  Lastly and on a larger scale, social networks have always been an integral part of humanity as we are inherently social beings, but as the world becomes more interconnected (via globalization) I am left contemplating the implications of such rapidly expanding social networks and how spatial networks will continue to shape the modern world?

-BannerGrey

 

 

Social Science and GIS

Monday, September 21st, 2015

In the article, Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles, the authors explain how social network theory methods can be applied to GIS in order to render a better contextualization of the territoriality of gang violence in Los Angeles (2010). I found it noteworthy that methodological applications of GIScience using social science analysis have the potential to inform activism against systems of violence and oppression. Pursuing methods to investigate the patterning of social relations through a geographic lens allows geographers the power to compare and devise patterns of violence at other scales and geographies. Therefore, the methods discussed within the paper have the capacity to inform widespread policy dedicated to ending gang violence on a large scale.

The application of social network theory methods to GIS reminds me that “doing GIS” is in fact a representation and assertion of social regulation and power. I suspect that my lack of knowledge about social network theory and structural equivalence limited the impact of the article’s insights for me. However, I do know that space as a social construction, rather than merely informing social process, is an important assertion and fundamental to critical GIS. The paper’s examination of gang violence in L.A. underscores that critical GIS plays an important role within the discipline of GIScience. Hopefully, future GIScience research will embrace critical GIS in order to more accurately understand how spatial social networks result in material geographic realities.

-GeoBloggerRB

Contemporary Social Media Implications of Embeddedness (spatial social networks)

Monday, September 21st, 2015

In his article “Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles”, Steven Radil uses the idea of embeddedness—or the idea that there are “structural constraint[s] on social action” (Radil 309)—to describe the occurrence of gang-related violence in the Hollenbeck Policing Area of Los Angeles. Although urban geographers have long been attentive to natural barriers (e.g.: rivers, topological features, etc.) and physical barriers (e.g.: highways, major bridges, etc.) as major features that can affect socio-economic phenomena of a city, the theory of embeddedness draws attention to other less visible structures that affect human and institutional behaviour. In describing the relative isolation of the gangs in Hollenbeck from the rest of the city, Radil explains that the areas surrounding the Hollenbeck are “served by different public school districts” which greatly “restricts across-place social interactions” between youth in Hollenbeck and areas adjacent to it. In other words, the social networks arising from contact in schools forms a sort of wall around the neighbourhood, in the same way that natural features such as the Los Angeles River isolate the neighborhood. Combined with natural and physical barriers, the fact that youth in Hollenbeck are socialized with other youth in the same school system, and not with those of other areas “restricts” their behaviour insofar as they will not attempt to recruit youth outside of Hollenbeck as the simply don’t come into contact with them. Resultingly, there are “no are spatially proximate gangs” (312) to the Hollenbeck area.

Embeddedness—which Radil credits to the work of sociologist Mark Granovetter in the 1980s—may have first been discussed three decades ago, but the potential applications for predicting institutional behaviour may never have been greater. Notwithstanding concerns regarding legality and ethics, social media and mobile phone communication records may hold great potential in predicting the behaviour of criminal institutions, such as gangs. Today, much research into online social media interaction has revealed some of the restraints on social behaviour inherent to a person’s embeddedness. For instance, Facebook researchers found that the rate of virtual interaction between two people in a declared relationship held statistically significant correlations with the probability of the couple’s likelihood to break up. In a similar fashion, the interactions between members of the same or rival gangs might be used to predict turf war or intra-gang conflict. As the gangs of LA and many other cities have a “strong attachment to turf, or the territory under the direct control of a gang” (312), online interaction between two rival gangs or simple triangulation mapping the gang’s movement through the city might be used to predict likely coalitions, turf war, or fractions and, therefore, justify heightened enforcement or police department visibility in those areas.

-CRAZY15

Spatializing Social Networks by Radil et al.

Monday, September 21st, 2015

Radil et al.’s (2010) article introduces methodological improvements in “spatializing social networks” through considering two forms of “embeddedness”: “closeness” and “position”(311). This article was able to highlight the importance of considering multiple network relations (e.g. gang relations and “turf”) because, in reality, various factors will affect human social behavior (e.g. gang violence) (312). Although Radil et al. considered “rivalry” and “turf” as social relations that cause criminal violence between different Hollenbeck gangs, it would have been impressive if they also accounted for social media communication (e.g. Twitter, Facebook) between the gangs and how it relates to locations of gang violence (313). With the increasing use of technology, especially within the younger generations, certainly social media would change how gangs interact within geographical space. However, it was stated clearly in the “Conclusion” section that their goal was to focus on a simple model that could support “future inquir[ies]” (322).

Radil et al. did not acknowledge GIScience even though the methodologies introduced by them would be considered within the GIScience’s discipline. The researchers reference Goodchild multiple times within the article, and mention the importance of “integrating social theories of geography and spatial analytical techniques,” but they still did not acknowledge the presence of GIScience within their own framework (308). After doing a little side research, I discovered that Steven Radil is a member of the GIScience department in University of Illinois (http://www.cigi.illinois.edu/igis/panelists.php) and Colin Flint also has associations with GIScience within different American universities. Even though Radil et al. consistently mention “spatial analysis” and “geography” and both advocate GIScience as a discipline, I wonder why they decided to omit GIScience from the article.

Furthermore, Radil et al. used GIS as a tool application to display their quantitative data in map form, allowing their data to be visualized for further clarity (320). It seems the methodologies applied were within the field of GIScience; however, Flint and Radil also used GIS and statistical techniques as well as George Tita’s crime data/research. This shows how GIScience works within multiple disciplines and utilizes multiple techniques (e.g. GIS and CONCOR).

-MTM

Spatialized Social Networks: Gang Rivalries in East LA

Sunday, September 20th, 2015

Radil, Flint & Tita (2010) take into consideration both the socio-relational and geographic components of gang violence to examine the distribution of rivalries and amounts of violence in an area of East Los Angeles referred to as Hollenbeck. The aim of their study was to explore whether social networks (in this case, rivalries between certain gangs) could be used in conjunction with the spatiality of gangs to partially explain their behaviour (in this case, gang violence).

Considering the situation purely from a geographic point of view, Tita (2006) found through use of a global Moran’s I test that there was only very weak positive spatial autocorrelation of gang violence in Hollenbeck. Thus Radil, Flint & Tita considered the social relations between gangs as a partial explanation of where gang violence occurred. To do this they used a network analysis technique called CONCOR (convergence of iterated correlations), which recursively divides census block groups based on both geographic embeddedness (spatiality of gangs and gang violence) and network positionality (rivalries between gangs).

Unsurprisingly, the first split resulted in a north-south division of the area which can be explained by landscape: they are on opposite sides of a major highway. The results become more interesting in the second split, which divides the northern gang turf into a center-periphery arrangement, that can only be explained by network positionality and amounts of gang violence. The southern division followed the same pattern as the first split and was divided seemingly geographically into another north-south orientation. The third split continues to suggest center-periphery arrangements of gang turf, in which turf in the central areas has both higher amounts of gangs rivalling over it, and thus greater amounts of gang violence, while turf in the periphery areas have lower amounts of rivalry and violence.

The third split reveals the existence of a spatiality referred to as geographical betweenness: areas composed of the turf of several different gangs are more similar to each other in the amounts of gang violence than to other areas. At the same time, the study shows that relational betweenness also leads to similarity between areas in the amounts of gang violence experienced. Some areas are composed of the turf of only one gang, but experience similar amounts of violence due to the gang’s relational position between rival gangs that also happen to be rivals of each other.

While one could guess that geographic and relational betweenness are important to think about when considering levels of gang-related violence, it is great that Radil, Flint & Tita were able to find a way to actually model these behaviours using network analysis. Hopefully this study will encourage future use of social network analysis in GIScience to investigate the embeddedness of social behaviour across space.

-yee

Twenty Years of Progress: GIScience in 2010

Tuesday, September 15th, 2015

In his article, Twenty Years of Progress: GIScience in 2010, Matthew Goodchild exposes the value of perceiving GIS as a science rather than a tool. GIS as a science is important because it has systematically enhanced our understanding of abstraction and theory, topological concepts, and ontologies. These insights are invaluable because they allow us to expand our capacity to discover the world around us. In addition, the limitations of GIS as a science expose flaws in existing epistemologies and gives the opportunity to develop future theories relating to various domains of research. For instance, GIScience’s emphasis on the topic of modeling error and uncertainty is of utmost importance for valid scientific method concerning spatial representation.

I was interested in Goodchild’s commentary about the role of the citizen in the future of GIScience. The emergence of the Web 2.0 and the public’s role as producer and consumer of spatial data is especially relevant to today’s generation. Discussions about the role of the citizen in GIScience brings to the forefront issues related to privacy and motivations for individuals to participate. The shift of how spatial data is handled nowadays sheds light on the future evolution of the technological and social systems we consume today.

-GeoBloggerRB

GIS: Tool or Science?

Tuesday, September 15th, 2015

In her article, GIS: Tool or Science?, Dawn J. Wright presents a nuanced approach to the debate about whether “doing GIS” is synonymous with “doing science”. Her commentary on GIS as “tool making” avoids dichotomous paradigms and acknowledges the fluid and complex nature of GIS. I especially found it interesting that the article is based on the output of a relatively new medium of scholarly debate. The GIS-L, an informal and open way of bringing together academics and GIS professionals, reflects the role that evolving communication technologies play in scholarly dialogue. The open discussion acknowledges consensus-driven definitions in order to enhance the validity of each side of the argument. The forum also emphasizes how key terms of GIS are subject to contestation. The author neatly presents their findings in table format to easily contrast each sides arguments.

In addition, the article addresses both the very abstract significance and the real world consequences of the tool versus science debate. For instance, the author acknowledges that the tool versus science debate includes the differences in the types of epistemologies and ontologies that constitute scientific method. On a less abstracted level, she also points out that whether GIS is perceived as a tool, toolmaking, or science affects its role in academia. The answers to these questions determine whether GIS will be taught at the undergraduate level as a technical orientation or at the graduate level as a research speciality. Therefore, whether GIS is perceived as a tool or science has very real consequences and is therefore a discussion worth having.

– GeoBloggerRB

Twenty Years of Progress: GIScience in 2010

Monday, September 14th, 2015

Michael Goodchild’s 2010 Invited Keynote Article published in the Journal of Spatial Information Science recognizes the accomplishments and evolution of geographic information science over the last 20 years. Goodchild states early on that “this paper is intended more as a stimulus to others to reflect, and does not pretend to be entirely objective” (2010:03).

GIScience is an emerging field that is still ‘finding its legs’, so to speak, as techniques and concepts developed for application mainly in geography-related endeavors are used more and more by researchers interested in data error and uncertainty, local spatial analysis and statistics, and modelling natural and human phenomena (2010:08).

Goodchild’s use of diagrams to illustrate to readers the results of a citation analysis effectively shows the relation between GIScience researchers and the development of three main sub-domains within GIScience: Spatial analysis and decision-making, environmental modeling and topography, and lastly data modeling and representation (2010:09).

This keynote article accomplished its goal of stimulating reflection as to the origins of GIScience, and where it is going. Goodchild effectively demonstrated that GIScience is growing, with more research being published every year, and enriching the field even more. Goodchild includes a list of 19 peer-reviewed “classic” papers that illustrate through their title alone the multidisciplinary and evolving field that is GIScience (2010:10). He then lists several topics that have yet to be researched within GIScience, from “neogeography” to the “third, fourth, and fifth dimensions” (2010:14).

I agree with Goodchild in that reflection on the past is crucial to better understand what has left to be done and discovered. GIScience may have a relatively short history, but it is gaining some serious momentum. Now we have to ask ourselves, what will GIScience look like in another 20 years? And how will it have changed our understanding of the space that surrounds us?

-ClaireM

Goodchild 2010

Monday, September 14th, 2015

In his 2010 update, Goodchild explains the developments in GIS over the past 20 years and where he expects the field to go in the next decade. His areas of further research really reveal how far the discipline has come technologically. For example in the 1992 article he discusses how the ability to show colour gradations needs to be improved. He speaks of being able to scan maps, and accurately recreate readable maps on screen. In 2010 he discusses the best ways of 3D/4D modelling and even adding fifth dimension of attributes that exist in space-time. His interest in new forms of GIS modelling shows how the field has tried to move away from maps as the end product. It is interesting to see how the field has diversified and the author’s perspective on GIS education. While some aspects of GIS have become increasingly complex ie. our modelling abilities, many basic parts of the GIS have become accessible to the general public. Whether or not education should focus on expanding the science or teaching the basic tools is an interesting debate. It seems that researchers would like to see it as a science, whereas firms that still use GIS for basic applications would probably see it as a tool.
-anontarian

Twenty years of progress: GIScience in 2010

Monday, September 14th, 2015

In “Twenty years of progress: GIScience in 2010” Michael Goodchild recognizes the 20th anniversary of the term “geographic information science” and aims to stimulate discussion on the advances, both past and future, of GIS. This piece definitely did engage my thoughts on the interdisciplinary aspects of the science and how it can struggle for an identity. My initial attraction to GIS and Geography was that it seemed to encompass so many different disciplines. While I understand the need to define GIScience as a unique field commanding respect from other scientific parties, it should not seek to define itself too rigidly. It is interesting to delve not just into the “what” of GIS but the “why” as the tools and capabilities become more complex. Goodchild could have expanded on the implication of GIS on social sciences and as an interesting “why” (we use GIS). I found myself wanting to know more about the shift from error to uncertainty and it’s coincidence with a shift in understanding of geographical conceptualization in a more globalized world.

This paper helped my understanding of how GIS could be a science to itself and what questions are still demanding answers. I enjoyed how Goodchild combined both technological advancement and areas lacking research at this time to pose thoughtful insights into the future of GIScience. Whatever the philosophical debate around GIS, there is no doubt that it has become a major player in the era of “big data” and is more in demand than ever before.

-VdeV

GIS: Tool or Science

Monday, September 14th, 2015

I have always considered GIS to be a science since it allowed me to undertake analysis of material in a way that resulted in a new understanding of spatial data. It maintained clear methodology and followed the scientific process. However, I clearly saw the programs used to reach such conclusions as a necessary tool of the trade. It was not until reading the 1997 piece “GIS: Tool or Science” by Wright et al. that I even knew there could be conflict in my conceptualization of GIS.

Wright et al. determined the act of “doing GIS’ to be divided into three categories: using GIS as a tool for research purposes, actively making GIS a more advanced tool, and doing GIS as a science, where further scientific advancement stemmed from initial GIS capabilities. While this article introduced an interesting topic of debate, my final understanding of the subject was not clarified much further by the GIS-L analysis presented.

The evolution of GIS since 1997 is obvious when reading this paper. I think the argument has advanced beyond many of the initial questions posed. For example, one person postulated that GIS would become more of a science when it divorced itself from geography – we could argue that GIS is now being used for other projects beyond basic spatial interpretation.

Another interesting note is there are many questions, and the paper as a whole, that I would argue remain very relevant to current discussion. Google Scholar shows that this piece has been cited 254 times and I personally wonder if GIS has evolved more into a science since the publishing of this piece. Linking back to our class discussion, if GIS is seen to only create maps then of course it will be recognized as a tool, but if further capabilities are imagined and implemented, a new science emerges.

-VdeV

GIS: Tool or Science?

Monday, September 14th, 2015

I’ve always perceived GIS as a means to an end. As a tool that automated analysis and organization of spatial data, so as to gain meaningful insights into our quantified Earth. I’m an undergraduate geography student seeking primarily to develop marketable skills, as are most these days, and tend to brush off most notions on the “philosophy of science” as a discussion meant only for grey-haired academics.

However, Wright et al.’s 1997 “GIS: Tool or Science” piece published in the Annals of the Association of American Geographers fundamentally challenged my view of GIS, and the importance of having the conversation in the first place.

Wright et al. analyzed and categorized the responses from the GIS-L electronic listerver, an online platform that allowed for many discussants to participate in the conversation. The responses to the question “GIS: Tool or Science?” were fit into three main topics: GIS as Tool, GIS as Science, and General Comments about Science (1997: 350). Many discussants argued that the answer to the question depends on the user and the nature of the task at hand (scientific research, technological development of end-user GIS products and suites, or use of GIS products for academic, commercial, or research purposes), and that perhaps engineering or applied science would be a more appropriate field for GIS to be a part of (1997:351). Wright et al. then went a step further to argue both sides of the debate in a clear and concise manner.

How do I now perceive GIS? Tool or Science? Having read the article, definitely both, but I also do not think that the discussion is over. Just as computer science evolved from mathematics, perhaps geographic information science will become its own field apart from the geography department, and no longer be delegitimized and perceived as nothing more than a means to an end.

-ClaireM

Geographic Information Science- Goodchild (1992)

Monday, September 14th, 2015

Goodchild’s (1992) article is centered on the fear that unless GIS makes the transition from being considered a system to a science, it will soon fade away as another technological fad.  One of Goodchild’s main concerns at the time was that GIS, though inherently useful, was restrained by its problematic integration into other fields (i.e. spatial analysis).  He attributed this to a focus on data management rather than analysis—a result of the lack of motivation to develop the necessary technology due to the “lucrative” yet “unsophisticated” needs of GIS in the commercial world (1992:38)—and also to the sheer obscurity of spatial analysis as a technique.  Currently, spatial analysis functions as an extension of ArcMap and is fundamentally a part of GIS as I know it.

Though Goodchild’s article was riddled with unanswered questions (at the time) I think he played an integral role in developing the case for GIScience by highlighting how multidisciplinary the field really is.  For example we look at spatial analytics, and with the wisdom of the future I believe this specifically was an important point to broach.  Bearing in mind that this system vs. science debate is still ongoing, I think the development of a concrete tie to analytics was beneficial for those making the case for GIS as a science.  Goodchild, an avid member of the academic community, recognizes academia’s requirement of a certain level of ‘rigor’ for a field to be considered a science and spatial analytics, now at the heart of GIS, absolutely brings this edge.

 

-BannerGrey

 

GIS: Tool or Science? – Wright

Monday, September 14th, 2015

Over the past twenty years, opinions on what “’doing GIS’” entails have been debated. In “GIS: Tool or Science?” (1997), Wright was able to categorize “64 postings from 40 individuals” on a GIS-L forum into three groupings of what “’doing GIS’” means (346-347). Regardless of whether GIS should be defined as a tool, a toolmaker, or a science, Wright was able to present all three positions in an unbiased way, allowing the reader to determine their own opinions about the debate.

Wright mentions that there is not necessarily one ultimately correct or authoritative position, rather the entire “continuum” between tool and science should be equally acknowledged because all viewpoints use GIS for different purposes (358). Hence, maybe it does not even matter if “’doing GIS’” is correctly defined, maybe there should be a consensus that GIS can be applied in different ways and be accepted for different reasons.

Although the debate is still occurring, I believe that the article was outdated because technological advancements within the past twenty years have been tremendous. With smartphones, apps, and improvements in software, new GIS applications have been introduced; resulting in a larger group of people becoming more involved with GIS. It would be interesting to compare how Wright’s subsets’ define GIS to how current people conceptualize GIS.

-MTM

 

Twenty Years of Progress: GIScience in 2010

Monday, September 14th, 2015

Goodchild (2010) provides an overview on geographic information science (GIScience) and its development as a discipline in the past twenty years (1990-2010). He then opens up discourse on how GIScience can be improved and applied in the future. What I was most interested in was not necessarily GIScience’s accomplishments as a discipline, but rather how its theorizing elements can be applied and improved for the future, especially with technology constantly changing. For instance, Goodchild questions how GIScience will handle large quantities of data that are being produced from new devices. He additionally questions how security will be managed. I admire Goodchild’s ability to raise unanswered questions because it shows that there are still many issues in GIS that need to be addressed. His discourse on the “role of the citizen” also spiked my interest because I would like to research how local people in underdeveloped countries/cities can contribute data (13-14).

What I think is unique about modern GIScience is its ability to mix with other disciplines (i.e. “geography, computer science, or information science”); however, contrary to what Goodchild states, I believe it is this reason that GIScience is not “well-defined” (16). Since it crosses over many disciplinary boundaries it is hard to establish itself as its own entity. I do not doubt the importance of GIScience, but it is still not that well known because, in my own opinion, spatial awareness is not a distinct enough feature to separate itself from other disciplines. It is especially hard to maintain a solid definition of GIScience because of how much it is evolving with technological advancements. For these reasons, I see GIScience being complementary to other larger disciplinary fields (just like how GIS tool applications can be used to help support research).

-MTM

 

GIS: Tool or Science?

Monday, September 14th, 2015

Wright et al. (1997) compound the debate amongst the GIS-L community as to whether GIS should be regarded as a tool or as a science.  In doing so Wright et al. also delve into profounder topics such as defining “doing science”.  Wright et al. identify three positions, on a sliding spectrum between tool and science: GIS as a tool, GIS as a toolmaking, and, GIS as a science.

My experience with GIS thus far is to utilize it as a tool for answering geography related questions; nevertheless, I fully understand and accept the view of GIS as a science when looking at research within the field.  Encountering this dichotomy in my everyday suggests the importance of how GIS is used on a case-by-case basis.  While Wright et al. do address this; I believe it was underemphasized in the article (and similarly the debate) as this is essentially the basis for the argument for a necessary shift from the “black-and-white” to a “fuzzier continua” of descriptions for conceptualizing GIS (1997: 358).

Secondly, this article brought to my attention the merit of regarding something as a science simply as a means of maintaining “academic legitimacy” (1997: 354).  Not all usages of GIS will be regarded as science, however this should not devalue it as a discipline.  I think this dilemma as presented to us by Wright et al. is extremely important to defy and not only in the fields of geography and GIS.  The idea that something is automatically more reputable because we somewhat arbitrarily categorize it under “doing science” means we are likely limiting our advancements as a society and I applaud Wright et al. for raising this issue.

-BannerGrey

 

#BIGDATA

Monday, December 1st, 2014

Using a case study that examines a stream of tweets related to late-night celebration events following the victory of the University of Kentucky Wildcats NCAA championship game Crampton et al. challenge us to look beyond the obvious when dealing with geotagged big data. Although the #LexingtonPoliceScanner hashtag identified the tweets related to the incidents that took place that night, a simple map showing the hotspots of twitter traffic over space and time merely scratch the surface of what is possible – leaving many unanswered question, multiple unexplored avenues.

It is important to note that this example featured the use of user generated content, introducing the risk of false information, and repeated informations facilitated through retweets: in essence noise. The location of the tweet is unclear as less that 1% of tweets were provided with GIS coordinates from where the tweet was posted, exposing a gaping hole in misleading information, location however could be derived from the user-defined location information, While the advent of big data is a sea of opportunity I would repeat the cautiousness of the authors with regards to the confidence with which the information can be used. Before the use of any data, patterns and trends need to be extracted through the exercise of data mining, a process that the authors argue can be enhanced through the addition of ancillary data to inform the data drawn from the big data source.

While the article clearly demonstrates the ways in which big data requires a broader look in order to tackle the research questions it can answer, I question choice of the case study presented as an example to illustrate this. I find that other examples would be far more appropriate in representing what big data really entails.

The example however provided the opportunity to present the concept of social networks and the idea of measuring distance not only over physical space but also through a social network structure. Social networks such as twitter offers the ease of access to UGC data that moves through the social network structure. I do wonder what potential would lie in another data set example removed from the category of geotagging.

– Othello

 

Time After Time

Monday, December 1st, 2014

Upon reading Yuan’s work on Temporal GIS and Spatio-temporal modelling, I have come to the realization that our current GIS systems are very much ill equipped to handle the storage and processing of all kinds of spatio-temporal models. Spatial is specials, yes, but all spaces are placed in time. We cannot ignore the fact that temporal is special too, everything happens in space and time. Most GIS data represents spatial information that is fixed in time, a slice of the full reality. Name me one process or object that hasn’t changed over time and I’ll bake you a cake of your choice.

The complexity of the six major types of spatial temporal changes in geographic information spoke to my unfamiliarity with such concepts. After 6 years of experience with GIS the subject of temporal GIS has not been addressed adequately to reflect the need to deeper development in this field. The need for further research is all too clear. The current GIS systems are incapable of modeling the temporal changes that most accurately describe phenomena such as forest fires or the development of storm systems in which objects change and transform over space and time. THe lack of support for such basic concepts echoes the incompatibility of GIS with other ways of knowing and the epistemology of the indigenous populations of northern Canada in particular.

The question remains: how will traditional GIS tools as we know them adopt and change to better address the potential that resides in these spheres, more importantly still how will implementation take place in the field? The introduction of a new data model that allows for the efficient and effective temporal analysis of phenomena would cause an overhaul in data structures as we know them, such changes would be well worth the effort. To continue as we currently do would be unfortunate.

With the advances in computational power that have led to rapid advances in geovisualization, the same tools should be directed towards the development of capability to handle all forms of temporal GIS.

– Othello