Geographic Mapping: Difference between revisions

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In geographical networks the layout of nodes is fixed and determined by some coordinates.
In geographical networks the layout of nodes can be determined by some geographic coordinates.


The geographic mapping allows the representation of geographical networks, whose node positions are characterized by latitude and longitude, over the corresponding map.  
The geographic mapping allows the representation of geographical networks, whose node positions are characterized by longitude and latitude, over the corresponding map.  


The map is downloaded from OpenStreetMaps, and therefore an internet connection is required when plotting a geographic network for the first time. When the position of the nodes is modified to avoid node overlapping, then the original position of the node can be recovered unchecking the option map nodes and visualizing the network. In this case the background map is not re-downloaded from the internet. Thus, an internet connection is not necessary.
The main features are:
* map nodes: positions based on two node attributes (longitude latitude) using mercator projection
* update map: download a map from the selected open street map provider and map it on the background (internet connection required)


Several map styles with a specific area and level of detail can be selected by the user.
If just the nodes should be mapped, e.g., without redownloading a new map, then "update map" can be deactivated.
 
Several map styles and different levels of detail can be selected by the user.




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=== Example Data ===
=== Example Data ===
The communication network of 9 students at the University of Konstanz during the semester break:
The communication network of 9 students at the University of Konstanz during the semester break:
* the [[ '''adjacency matrix''']] of the communication network above
* graphml file with network containing geographic node attributes [[File:geonet-withoutMap.graphmlz]]
* the [['''Coordinates''']] of the city where the students live
* graphml file with geographically mapped nodes and map [[File:geonet-withMap.graphmlz]]

Latest revision as of 07:45, 13 March 2015

In geographical networks the layout of nodes can be determined by some geographic coordinates.

The geographic mapping allows the representation of geographical networks, whose node positions are characterized by longitude and latitude, over the corresponding map.

The main features are:

  • map nodes: positions based on two node attributes (longitude latitude) using mercator projection
  • update map: download a map from the selected open street map provider and map it on the background (internet connection required)

If just the nodes should be mapped, e.g., without redownloading a new map, then "update map" can be deactivated.

Several map styles and different levels of detail can be selected by the user.


Communication network:
9 students at the University of Konstanz living in the Bodensee region and communicating during the semester break
Geomap.png

Example Data

The communication network of 9 students at the University of Konstanz during the semester break:

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