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A FRAMEWORK FOR TEMPORAL GEOGRAPHIC INFORMATION (Langran & Chrisman, 1987)

27 November 2017 - 12:07pm
In this paper, the authors discuss the components of cartographic time and describe three methods of conceptualizing geographic temporality. The discussion is heavily based on traditional relation database perspectives (i.e., database lacking temporal considerations). Although it facilitates studying geographic temporality, the limitation of referring to traditional methods is obvious. For example, the consistency of temporally-changeable […]

Langran & Chrisman: Temporal Geographic information

27 November 2017 - 12:06pm
Temporal GIS introduces the concept of temporal topology coupled with the more common spatial topology to allow us to better understand the relevance of time in cartography. Effectively, while time is a constant/infinite progression, maps and cartography can only portray certain glimpses of space along a timeline; whether it dynamic or static maps provide a […]

Marceau – 1999 – Scale Issue

27 November 2017 - 10:51am
Marceau’s article provides a look at how geographers and other social scientists use and understand relative and absolute spatial scale. For geographers, scale may be a more well understood concept compared to others, but that does not necessarily mean that scale is more important to a geographer’s work than to an engineer for example. Scale […]

Scale in a Digital Geographic World (Goodchild & Proctor, 1997)

27 November 2017 - 9:57am
This paper discusses the problem of characterizing the level of geographic detail in digital form. That said, the traditional representative fraction seems useful but has many problems. Among these problems, I think assessing the fitness of data sets for particular use is most critical in practice. The authors argue that it is necessary to identify […]

A Framework for Temporal Geographic Information, Langran and Chrisman (1998)

27 November 2017 - 1:10am
Langran and Chrisman (1998) discuss the antecedents of temporal GIS, its core concepts, and a number of ways in which temporal geographic information is conceptualized. The map/state analogy was helpful for my understanding of the spatial and temporal parallels. I suppose the stage concept of time is fairly intuitive, but I appreciated its connection to […]

Thoughts on Geovisualization of Human Activity… (Kwan 2004)

26 November 2017 - 11:18pm
The immediate discussion of the historical antecedents for temporal GIS by Swedish geographers uses the 24-hour day as a “sequence of temporal events” but I wonder why this unit of measurement was chosen as opposed to 48-hours or a week to illustrate the periodicity of temporal events, which may not be captured at the daily […]

Goodchild and Proctor (1997) – Scale in digital geography

26 November 2017 - 2:02pm
As might be expected, Goodchild and Proctor provide an insightful and lucid evaluation of how conceptions of scale should translate from paper to digital maps, and their analysis remains pertinent in the face of two decades of rapid digital cartographic development. They argue that the representative fraction, as traditionally used by cartographers to represent scale, is outdated […]

Kwan & Lee : Geoviz of Human Activity Patterns using 3D GIS

26 November 2017 - 12:17pm
  Having covered my talk on VGI and the implications of real-time tracking of individuals in space time, I found Kwan & Lee’s (2003) use of temporal GIS quite refreshing and a very unique and insightful study. In overtly using temporal GIS with such a large study group (7,090 households), this data collected goes from […]

Marceau (1999)-The scale issue in social and natural sciences

25 November 2017 - 11:08pm
This article is very interesting, and addresses what I think is a major issue within GIScience-the scale issue. Marceau (1999) lays out the “scale problem” (2), and provides a thorough review of solutions (and their limitations) from the literature. I also enjoy the before last paragraph of the paper, which suggests that the “methodological developments […]

Scale (Goodchild & Proctor 1997)

25 November 2017 - 3:24pm
Prior to reading this paper I went in knowing scale was a key concept of geography, and one of much debate. After reading Goodchild & Proctor 1997 however, I feel this was an understatement. The authors extensively cover a much needed recap of traditional cartography, and the initial concreteness of scale and the common metrics […]

Kwan and Lee (2004) – Time geography in 3D GIS

25 November 2017 - 2:59am
In this article, Kwan and Lee (2004) explore 3D visualisation methods for human movement data. In the language of time-geography, which borrows from early C20th physics, space-time paths describe movements as sets of spacetime coordinates, which (if only two spatial dimensions are considered), can be represented along three spatial dimensions. These concepts have become a fundamental part of […]

Thoughts on Langran and Chrisman

24 November 2017 - 6:51pm
I found this conversation about temporal GIS to be a particularly interesting introduction to the topic of temporal GIS. This notion of GIS adds an extra dimension to my shifting idea of it being primarily based on the representation of maps to a tool in retaining and displaying data. Sinton (1978) notes that geographic data […]

Thoughts on Goodchild and Proctor – Scale in a Digital Geographic World

24 November 2017 - 6:51pm
Goodchild begins with a notion that originally shocked me. The metric scale was supposedly unsuitable in digital cartography. I had never considered this notion before, but he nonetheless present a convincing explanation of his reasoning. Confusion over what he means by scale is widespread, which either significance the spatial extent of the map or the […]

Lang ran and Chrisman (1988)- Temporal GIS

24 November 2017 - 3:54pm
I found the discussion on temporal geographic information by Langran and Chrisman (1988) interesting, as it teetered between being relevant, and being dated. On the one hand, time is still a difficult thing to express and visualize, both attached and unattached to spatial data, but it is still extremely important to convey. On the other […]

Marceau (1999) and Scale

24 November 2017 - 2:45pm
Marceau’s (1999) article does an excellent job of highlighting the significance of scale across both human and physical geography. This article made me think more deeply about the impacts of scale that I every have had to before, which points to a significant gap in my education in geography. While I have been taught about […]

Scale Issues in Social and Natural Sciences, Marceau (1999)

23 November 2017 - 10:02pm
Marceau (1999) describes the significance of and solutions to the issue of scale as it relates to social and natural sciences. The articulation of fundamental principles was helpful in demonstrating the importance of scale as a central question in GIS. It’s clear that the question is particularly important now as we continue to develop a […]

On Marceau (1999) and “The Scale Issue”

23 November 2017 - 3:56pm
I really liked how in depth this article went, reviewing development of studies on scale that were outside of the author’s department/field of study. It really emphasizes that this is an issue that applies to both physical & human geography (and others who study geographic space), so it’s cool to see interdisciplinary efforts towards this. […]

On Kwan & Lee (2004) and the 3D visualization of space-time activity

22 November 2017 - 7:04pm
This article was super interesting, as I find the topic of temporal GIS something that’s increasingly pressing in this day and age (and still challenging from the early 2000s). The visualizations were really interesting, and it seems like they provided way more information faster than just analyzing the 2D movement (no time) would provide. Also, […]

Schuurman (2006) – Critical GIS

20 November 2017 - 3:14am
Schuurman discusses the shifting presence of Critical GIS in Geographic Information Science (GISc) and its evolving role in the development of the field. Among other obstacles, Schuurman identifies formalisation—the process by which concepts are translated into forms that are readable in a digital environment—as a key challenge to critical theoretical work gaining further traction in […]

MacEachren et al (2005) – Visualising uncertainty

20 November 2017 - 1:49am
MacEachren et al evaluate a broad set of efforts made to conceptualise and convey uncertainty in geospatial information. Many real world decisions are made on the basis of information which contains some degree of uncertainty, and to compound the matter, there are often multiple aspects of uncertainty that need to be factored into analysis. The […]