Science topic

Geovisualization - Science topic

Explore the latest questions and answers in Geovisualization, and find Geovisualization experts.
Questions related to Geovisualization
  • asked a question related to Geovisualization
Question
6 answers
Dear all,
I am looking for some regional science journals that accept short articles and specifically regional graphics (e.g. maps, geovisualisations) with a maximum of 500/1000 maximum words of accompanying text. Do you have any suggestions? Thank you
Relevant answer
Answer
Land: An open Access Journal... please have a look!
  • asked a question related to Geovisualization
Question
5 answers
I'm looking for information about drought geovisualization,  how is the drought information communicated in the context of the threat? (publications, webGIS, geoportals, virtual globes).
Relevant answer
Answer
http://www.trockenheit.ch (from Switzerland, WSL)
  • asked a question related to Geovisualization
Question
1 answer
I would like ask you about your experience with different implementation of SWE services, mainly SOS.
Relevant answer
Answer
Dear Karel Charvat ,  I now the implementation  SWE service SOS ,  whit water ocean and whit stars , and whit continents , but not whit moon .
  • asked a question related to Geovisualization
Question
14 answers
Maps and other kind of geovisualizations such as globes, interactive 3-d worlds etc. seem to be very popular and fascinate a lot of people. But what is the reason for this (just aesthetics, potential immersion/fantasy firing, exploratory spirit, ...)?
Well, of course there are a lot of threads in the Web that deal with this question. But for me, the answers I found there are not really satisfying (often fuzzy, not pointing-out the core issues). Who knows research works, scientific papers, or useful Web-links addressing this topic?
If we knew what makes geovisualization such interesting, maybe we could export these ideas and concepts to other domains, e.g. to set-up interesting user interfaces for (non-geospatial) applications, or to design innovative experiental spaces, etc.
I'm curious about your thoughts and ideas!
Relevant answer
Answer
The question focuses on the meaning of visualization in people's way collecting information. Vision is a  sense having highest capacity for collecting information in five people's natural senses, hearing, smell, taste, touch, and vision. Vision has been keeping 70 - 80 % information collected by a person every day. Hence, people perceive and understand easy information implied in image, graph. Map as a graph represents visually objects and fields at locations. The visualization of locations and attributes of objects and fields on a map assists people to perceive easy and understand better the objects and fields at locations. This is why people like map and geovisualization.
About the role of vision in people's perception of information may be found in:
S. Few, "Tapping the Power of Visual Perception," Perceptual Edge, pp. 1-8, September 4, 2004.
  • asked a question related to Geovisualization
Question
1 answer
Hello everyone, I am working on creating a Vector Tiling Service that will allow me serve my GIS data all the way from the storage to the map client as vector without loosing  any attributes as opposed to raster tiling. Is their any current implementation and/ or some literature on some work that has been done that I could use as m reference? Theoretically it is documented that it is possible and would be more efficient than the current rendering standards such as WMS, WFS, Raster tiling or even the use of GEOJSON and XML which are readable but very large in size sometimes freezing the browser if the file is large enough. Any one with some material on this please share! My motivation is based on this question on stack exchange
Relevant answer
Answer
I would say vector tiling could be an alternative approach for publish vector data on the web.  But due to the limited size of a screen, I would rather to merge or omit some vector layers for a better layout view. When zoom out, less vector layers should be displayed.    Take the road system layer, when zoom out, pathways should not be displayed. This can be done by setting the max and min scale of the layer.   And when zoom in, pathways which fall out of the view should not be transferred to the browser, this can be done by an overlapping process at the server end.
  • asked a question related to Geovisualization
Question
15 answers
For a same digital elevation model (DEM), I applied different classifications. In the following figure, to the left is the outcome of natural breaks (Jenks 1967), while to the right is that of head/tail breaks (Jiang 2013). The right pattern revealed the underlying scaling pattern of far more low locations (or low value pixels) than high locations (or high value pixels). However, we have got used to the left pattern. What do you think?
Jenks G. F. (1967), The data model concept in statistical mapping, International Yearbook of Cartography, 7, 186-190.
Jiang B. (2013), Head/tail breaks: a new classification scheme for data with a heavy-tailed distribution, The Professional Geographer, 65(3), 482-494.
Relevant answer
Answer
Dear Gabriel Asato,
Many thanks for your comment that helps to bring the discussion in this thread at a high level. There are two kinds of beauty: one is triggered by surface colors and nice designs that is subjective, and the other exists in deep structure that is objective. I fully agree with you that some people like you are in favor of Tom Paterson's rendering, which looks beautiful and eye-catching. On  the other hand, a majority of people find (consciously or subconsciously) head/tail breaks-induced rendering has positive impacts on human well-being. The second kind of beauty can be effectively revealed by the head/tail breaks rather than conventional classification methods. I made this point clear in this paper:
Jiang B. and Sui D. (2014), A new kind of beauty out of the underlying scaling of geographic space, The Professional Geographer, 66(4), 676–686.
Even though there is no classification involved Tom Paterson's rendering, the color scale is still similar to those by conventional classification methods. Instead, I think the color scale should be similar to one by the head/tail breaks. Note: by color scale, I mean how color should be transitioned from one end to another (linearly, non-linearly, or arbitrarily).
More recently I developed a mathematical model of wholeness, with which one can learn why something is beautiful, but also how much something is beautiful.
Jiang B. (2015), Wholeness as a hierarchical graph to capture the nature of space, International Journal of Geographical Information Science, xx(x), xx-xx, Preprint: http://arxiv.org/abs/1502.03554
Clearly the right pattern is more beautiful than the left one. Benoit Mandelbrot referred to the left as cold and dry, while Christopher Alexander referred to the right as a living structure.
  • asked a question related to Geovisualization
Question
1 answer
Please give me your ideas, how social innovation and social validation could contribute to SDI building.
Relevant answer
Answer
@Karel Charvat good to see you here.
Indeed SDIs have social dimension because at the end of the day these are meant to deliver benefits to social communities. Local knowledge that will come though social groups would help not only to validate the specific needs of an SDI and its rationale for a particular region and but also to fetch innovations from the region itself.
  • asked a question related to Geovisualization
Question
2 answers
My colleagues and I work on developing computational and visual approaches to understand spatial, temporal and demographic patterns in family networks. Please send me a message if you are interested in using our methodology or if you have common research interests for potential collaboration. I attached our recent publication and below is my website where you can find more information.
Relevant answer
Answer
Dear Eric,
Thanks for your response. Your research is very interesting and I think is very related to my methodology for visualizing social connectedness across space and time. There is a great opportunity for collaboration. I would like to learn more about your research and hopefully apply the methodology to your data to visualize diaspora connectedness across geographic space and through time.
If you have an English version of your article and maybe some information to describe the metadata such as:
- What are the geolocations? How are they derived? In what context is geography important? For example, use of virtual space (communities) to organize events in physical space.
- How do you define connections(edges) in the network? And are you interested in reflecting the connections in the geographic space as well as the network space?
- How is the temporal dimension is collected?
Please feel free to send a personal message or email at caglarkoylu@gmail.com.
Best,
-Caglar
  • asked a question related to Geovisualization
Question
15 answers
Perception of different visualization (aerial photo vs. sketch map vs. thematic map). Does it have any differences to non expert GIS users to estimate distance or location from these different visualization?
Relevant answer
Answer
My dear Gvantsa,
Please first note that a sketch is a sketch not a map. The distinction between sketch and map is simply that latter is constructed with a (distance) scale for the purpose of standardisation, while latter is without scale. Please again give some thought to the phrase, " for the purpose of standardisation", this qualification is meant to emphasise the point that no map is true to the scale. Even, the so called equidistant maps are true to scale along certain parallels or meridians or a few of both. Since on a map error of scale can be measured therefore a scale is an essential ingredient of of a map as in its absence, it is difficult to map as error may be infinite and distortion could not be manageable. As all know that in mapping of an area of 10 km dimensions, the Earth surface is presumed to be flat, as the extent of area increases curvature of the Earth is taken into account, so Earth is modelled to an ellipsoid of convenience at the global or regional level. Thus, a sketch is out of discussion. In the case of aerial photographs, after making orthophotographs and accounting for geometric and other corrections, after interpretation and Photogrammetric processing, a photograph may be converted into mapped visualization by selecting an appropriate projection to the purpose using longitudes and latitudes of control points. Distances and locations on such a map will be in tolerance limit and precise location and distance can be processed with reference to mp projection used.
  • asked a question related to Geovisualization
Question
7 answers
My mentor give a topic related to spatial data cube, and I know little about this. Can anyone give a more specific explain? What technologies does it need? Or recommend some paper for me?
---------------
I'm sorry that I haven't mention about the data I use. It comes from the land change and it's all vector data. Thanks to the answer of Robbi and Ruxandra, I've known that it has a relationship with the Spatio-Temporal Data Mining.
Relevant answer
Answer
As your issue relates to spatio-temporal data, I guess "space-time cubes" are what you're looking for. These are some 3D spaces in which X,Y coordinates of features are their real-world coordinates, whereas Z (height) is actually the temporal coordinates (time of measurement). Space-time cubes are like multi-story buildings, with each story representing a snapshot of your feature in a given time.
So theoretically you can build such datasets in any environment and using a variety of data formats. Matlab, ArcScene, or any 3D environment that you are familiar with. I am not quite sure, but maybe ILWIS Open could be an open-source alternative.
  • asked a question related to Geovisualization
Question
5 answers
Could you compare WFS and KML standards? What are the advantages and disadvantages of both?
Relevant answer
Answer
I'm not sure that we can compare KML and WFS.
KML is a format just like GML, JSON, CityGML, Shapefile, etc, but WFS is a service. For example WFS outputformat can be GML, Shapefile, JSON, CSV and so on, I assume also KML is possible.
We can compare KML vs GML, JSON, CSV, Shapefile and other formats.