A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors
36
votes
4answers
11k views
How to build effective heat-maps?
Using ArcGIS, QuantumGIS, Grass, and/or GVSIG
What are some of the tools and processes involved in building effective heat maps?
What are the plugins involved?
What are the major data requirements?
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4
votes
2answers
2k views
How to create heatmap (concentration of points) in QGIS?
There was already a question about it in 2010, where the answer was basically "use QGIS Heatmap plugin".
I've also read on QGIS webpage that it is now "implemented as a native C++ plugin"
My ...
6
votes
1answer
149 views
how to aggregate the rates, represented by points, within X radius
the point represents rates like 10%, etc. (this was also pretty clear from 2 years ago) -- been trying to do this for 2 yrs...
the points dont represent numbers of events since they are rates ...
11
votes
3answers
2k views
How could I turn my data into a heatmap / intensity map?
I have database that tracks a large number of entities. Each entity has a 'coverage area' or 'catchment area' - a radius in miles from a specified UK postcode, eg
Leyton office 4.3m E11 4LL
...
7
votes
1answer
155 views
Why is there a black hole in the Heatmap?
After running the Heatmap tool in QGIS I like to color the geoTiff according to my wishes. Using Psuedo color works fine, but it leaves me with no options, as type of color scheme or transparancy on ...
6
votes
2answers
196 views
How do I compute v.kernel maps in less than 16 hours?
I am using the GRASS GIS 6.4.2 bundled with QGIS 1.8.0, using a PostGIS dataset exported via v.in.org.qgis from QGIS, to create kernel density maps.
The layer has 738,288 points.
My problem is the ...
6
votes
1answer
186 views
How to adjust the granularity of a heat map in QGIS?
Not sure I am using the correct terminology here, so I have tried to describe my problem in detail. Please edit as needed.
I have a layer of points, a layer of roads and a heat map in a raster layer. ...
1
vote
1answer
66 views
How to display relative concentration of point features in ArcMap (heatmap)
Please bear with me here - I'm pretty new to GIS, and I'm having a lot of confusion about all the different terms I've seen thrown around.
Here's my problem: I have a large dataset of point ...
1
vote
3answers
994 views
How to generate heatmaps with QGIS1.9 plugin automatically?
I created a few heatmaps with the new plugin in QGIS 1.9, but now I would like to generate a lot of them automatically. How should I do?
I created a few of them by hand, but I should first import the ...
