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Results tagged with visualisation
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user 79
The representation of data in a viewable medium or format
3
votes
Accepted
Creating proportional circles in QGIS 3.4
In the layer styling panel, you first select Graduated for your type of symbolisation and then under Method you select Size instead of Color.
You can then change the start and end size, how many cl …
- 83.2k
10
votes
Assign a specific color to vector layer based on RGB codes in attribute table
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression e …
- 83.2k
1
vote
Mapping Ecclesiastical Parish Data?
The Vision of Britain has Ecclesiastical Parish boundaries but I can't see them listed on the data download page. It may be worth contacting the project to see if they can supply them. Or you could co …
- 83.2k
1
vote
How to create a value-by-alpha map in Java?
You can create maps using value by alpha using SLD - (the point being that WA has a lower unemployment rate than OR but has more people so it appears more solid).
The trick is to use an expression …
- 83.2k
1
vote
Accepted
Why does my zoomToExtent zoom to 0,0?
You don't say where the vectors are coming from but I'm guessing you are loading them from somewhere. In which case I suspect you call getDataExtent() before the layer has finished loading. You'll nee …
- 83.2k
3
votes
How to visualise "distance from amenities"?
The term you are looking for is accessibility surface analysis/visualisation - Google will point you to many examples in the literature. …
- 83.2k
2
votes
High quality public transport trip planner examples? Trip visualization examples?
One well known one is Portland TriMet - with out more detail of what you are looking for it's hard to suggest things.
- 83.2k
4
votes
Where can I find free Bathymetric data for Indian Ocean?
http://www.naturalearthdata.com/downloads/ has 1:50M rasters of the Ocean Bottom (http://www.naturalearthdata.com/downloads/50m-raster-data/). All their data is public domain so there are no worries a …
- 83.2k
4
votes
What is the point of standard symbology?
A lot of the standards work comes from the military (NATO etc) so that when you have half a dozen military forces bombing some where they can all agree what their friends and the enemy symbols are. It …
- 83.2k
3
votes
How to create spatial tag clouds or "tag maps"?
Some of the things we talk about in HEALTH GeoJunction: place-time-concept browsing of health publications http://www.ij-healthgeographics.com/content/9/1/23 could be relevant. We didn't put the tags …
- 83.2k
6
votes
How to create spatial tag clouds or "tag maps"?
The key paper describing this work is Interactive Tag Maps and Tag Clouds for the Multiscale Exploration of Large Spatio-temporal Datasets, by: Aidan Slingsby, Jason Dykes, Jo Wood, Keith Clarke, In I …
- 83.2k
3
votes
How to implement value-by-alpha map in GIS?
You could do this is uDig using an SLD based style that calculates the % opacity using the math functions in the OGC filter spec. I'm not sure how efficient it would be but could certainly be used for …
- 83.2k
3
votes
How would I draw and visualize custom maps based on OSM data?
Look at http://codebrainz.ca/index.php/2009/09/27/installing-mapnik-and-friends-on-ubuntu-904/ for a detailed explanation.
- 83.2k