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Questions tagged [heat-map]

For questions about heat maps, where a heat map is a graphical representation of geographic data, generally in the form of a coloured raster. Heat maps are used to highlight regions of higher than average data density.

65
votes
5answers
43k views

Building effective heat-maps?

Using ArcGIS, QGIS, 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? What ...
30
votes
9answers
15k views

Creating polyline-based “heatmap” from GPS tracks?

This winter I am planning to track my downhill skiing/snowboarding using a GPS. Most of my riding will occur at the same resort. I would like to be able to create a sort of "heatmap" that shows the ...
1
vote
1answer
358 views

Workarounds for heatmap plugin in QGIS?

In QGIS 2.8, the heatmap plugin got CRS broken. I updated to 2.10, now in the plugin the dialog is broken: it does not let you choose the format. I render layers for atlases with heatmap style. But I ...
3
votes
2answers
546 views

Create line heatmap with QGIS

I have loaded my bike tours as .gpx files into QGIS. It already looks quite nice but I was wondering if it might be possible to create something similar to the strava heatmap with tools of QGIS. I ...
13
votes
2answers
5k views

Difference between Heat Map and Hot Spot Analysis?

What is the difference between "Heat Map Analysis" and "Hot Spot Analysis"? Are we perhaps using hot spot analysis to get the required relations between features, and then using the results as an ...
4
votes
1answer
4k views

Creating map with states by attribute value using QGIS?

I'm using QGIS, but I am quite familiar with R and python, so I could use any of these. I want a map of mexico but want to color the states according to a certain variable that goes from 0 to 100. So ...
8
votes
1answer
2k 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. ...
6
votes
2answers
461 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 ...
1
vote
1answer
4k views

Adding Basemap on QGIS?

I'm entirely new to QGIS and mapping services in general. I add my data via CSV to create a new map layer (following the QGIS heatmap tutorial), I select Longitude in my X coordinate, and Latitude in ...
1
vote
2answers
840 views

Heatmap Processing Exception in QGIS 3.2

I am working through training exercises with the Alaska training data using QGIS 3.2 on Windows 8. To create a Heatmap, I load the airports shapefile. I cannot find the Heatmap plugin using the ...
18
votes
1answer
3k views

Heatmap algorithm to visualise point diversity

Can anyone suggest an algorithm to generate a heatmap for visualising point diversity? An example application would be for mapping areas of high species diversity. For some species, every single plant ...
7
votes
2answers
32k views

Making heat maps using ArcGIS?

I want to prepare the heat maps so what parameters are required for that?? I have large point data (I want to represent the density on the map) I gone through the following posts : How to build ...
9
votes
2answers
7k views

Creating heat map or density map from stacked polygons in ArcMap?

I have a polygon shape file that has many overlapping features. Each feature represents an area used by polar bears. So some of the polygons overlap and some don't, and there are separate clusters of ...
7
votes
4answers
7k views

Heat map / Density map from dynamic points table in MapServer (GeoServer)?

How can I create a heat map (some would call a density map) from a points layer in MapServer (or GeoServer)? (preferably able to choose Interpolation method, NN, IDW, etc and color map with a ...
14
votes
3answers
8k 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 ...
3
votes
1answer
2k views

How do I create a heatmap in ggplot?

I'm using R with ggplot2 to generate maps from shapefiles and from data in SQL Server. I'm trying to get to a stage where I can automate a large chunk of the mapping I do. So far this is working well ...
10
votes
3answers
2k views

Doing heatmap from line data in QGIS?

I want to perform a line density analysis for my line data, based on an attribute. The heatmap option (kernel density analysis) seems to be only possible for point data. I have tried to convert my ...
6
votes
1answer
4k views

Creating heatmap (concentration of points) in QGIS?

There was already How to build effective heat-maps? from 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++ ...
5
votes
2answers
2k views

Key for a Heat Map

I have a question about heat maps and the correct way to describe the results. I have a dataset of small historic territorial units which vary greatly in size in different parts of a country. I want ...
19
votes
0answers
201 views

Output formats for QGIS Heatmap plugin not appearing in drop-drown in Ubuntu [duplicate]

I've been trying to use the heatmap plugin on QGIS (2.8.2) on Ubuntu(14.04) but the drop down for the output formats doesn't get populated. Selecting the drop-down allows me to press OK on the ...
8
votes
2answers
13k views

R : How to build heatmap with the leaflet package

I read a post about interactive maps with R using the leaflet package. In this article, the author createD a heat map like this: X=cbind(lng,lat) kde2d <- bkde2D(X, bandwidth=c(bw.ucv(X[,1]),bw....
6
votes
0answers
1k views

Using stat_density2d with coord_map in ggplot2 [closed]

In my example I am plotting a shapefile for all England & Wales, however I'm interested in the greater London area. If I allow ggplot to simply default and display the entire shapefile then the ...
6
votes
2answers
465 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 (...
6
votes
1answer
2k views

How does QGIS calculate heatmap values?

I made a heatmap from points (with values) in QGIS, and now try to understand what the values in color scale are. Radius 300 map units (meters) Pixel size 10 map units (meters) Point values are 10-...
3
votes
1answer
687 views

QGIS using the heatmapplugin from the console

I have to make a lot of heatmaps from csv's. Therefore I'm making a python script to run in the console. So far I can load csv's and save them as shapefiles. To get to the heatmapplugin I'm using the ...
3
votes
1answer
604 views

Interpreting raster values generated by QGIS Heatmap plugin?

I have generated a nice heatmap (point density) based on a point layer using the QGIS Heatmap plugin, set up as follows: I calculated both outputs as shown in the screenshot below: 'Scaled by Kernel ...
2
votes
1answer
5k views

OpenLayers HeatMap add customized data

I want to add HeatMap customized data based in a vector (longitude, latitude, temperature). Currently I have this code: data = new ol.source.Vector(); map = new ol.Map({ target: 'map_canvas'...
2
votes
1answer
257 views

How to visualize car park occupancy over time?

I am using QGIS Brighton 2.6.1. I have a csv table with the exact entrance datetime and exact exit datetime of every car in an specific parking. Example of table: Nº DateTimeEntrance ...
7
votes
1answer
279 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 ...
3
votes
3answers
2k 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 ...
3
votes
1answer
360 views

QGIS creating a heatmap

This is my first question here. I have used the forum extensively in the past and it has been an incredibly useful resource, but this time I am stuck with an issue I cannot resolve. Here is a brief ...
3
votes
1answer
379 views

Where is the GeoServer heatmap rendering transformation source code?

I'm trying to find the source code for the GeoServer Heatmap rendering transformation. I can't find anything relevant in the GeoServer GitHub repo. This page in the developer guide includes a code ...
2
votes
1answer
4k views

How to apply weight to Google heatmap?

I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { heatLayer = new HeatmapLayer({ config: { "useLocalMaximum": true, "...
2
votes
1answer
494 views

Ordering Cartodb torque visualization over Google Maps heatmap layer

I am attempting to create a map with two layers: a CartoDB Torque visualization on top and a Google heatmap layer underneath. So far I have only been able to get them to draw in the opposite order I'...
1
vote
1answer
361 views

Create polygons from point dataset, where each polygon contains 3 points from the dataset [duplicate]

I'm using qgis Brighton I have a dataset of 1500 points. I want to create polygons, where each polygon contains n=3 points from the dataset. The aim of this is to have clusters of 3 points, which ...
1
vote
1answer
28 views

Old Geoserver install (“2.1.?”) will not validate Transformation element in Heatmap SLD XML

I'm stuck with an old, weird version of Geoserver in our production environment (circa 2011, installed in an opengeo-suite directory). It seems the WPS extension is installed. On my http://www.our-...
0
votes
1answer
228 views

Heatmap is upside down

I have a point file saved as a shapefile, now I want to produce a heatmap of the values. However the heatmap is projected upside down. I suspect my y coordinates are inverted or negative but I do not ...