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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 ...
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 ...
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 ...
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 ...
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 ...
12
votes
6answers
3k views

How do I make a heat or Choropleth map that uses polygons in QGis?

I've been playing around with the heatmap plugin for QGIS and I am wondering if it is possible to make heatmap with using a similar plugin/tool that uses polygons as well as points? I would like to ...
12
votes
4answers
1k views

HeatMap to identify hotspots on cached service from ArcGIS Server?

ArcGIS Server lets you create cached map services. These can be consumed by various applications (ArcGIS Desktop, web apps, etc) I would like to get an idea on which areas of my cache are getting hit ...
11
votes
3answers
523 views

A global, grid-like projection for creating heatmaps

I'm putting together an application where I need to create a vector grid which will be used to store and display a heatmap. It has the following requirements: Can cover the entire planet. The vast ...
10
votes
2answers
4k views

How to use Heatmap plugin and its output?

I have a layer of points which I would like to depicted as a heatmap concentration of points for visualization. In QGIS 1.8 I tried the built-in heat map plugin, leaving the default values as is, and ...
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 ...
10
votes
1answer
811 views

Creating Human Trafficking Heatmap in QGIS?

I'm trying to create a heatmap with about 325 points distributed around the city of Houston. (FYI Houston is a major human trafficking in the US: a title shared with LA and Atlanta depending upon ...
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 ...
9
votes
1answer
941 views

Creating contours with meaningful values from point data

I recently obtained a CSV containing the locations of all recorded bicycle accidents in Boston over the past few years. As an avid cyclist, I'd like to create a simple contour map that draws attention ...
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....
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. ...
8
votes
2answers
571 views

Efficient raster sampling of billions of polygons (bounding boxes)

How can a raster be computed efficiently (in Python), given a set consisting of billions of bounding boxes (read sequentially from a file), and given that the raster values for each cell should give ...
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 ...
7
votes
2answers
1k views

Can I combine two heat-maps in QGIS?

I have two heat-maps and related point data layers, one of correspondent sender addresses, the other of recipient addresses. I wish to identify clusters -- hotspots -- of sender and receiver addresses....
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 ...
7
votes
1answer
2k views

How to Create a Heatmap in PostGIS

I'm wondering if anyone can point me to resources for making a heatmap entirely within PostGIS. I'm able to create a new raster with an empty band, but it's not clear to me how I can assign values ...
7
votes
1answer
278 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
461 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-...
6
votes
1answer
424 views

Calculating urban areas that need pharmacies using QGIS?

I'm very new in QGIS. The task is to calculate the urban areas that has lack of pharmacies. I have buildings points with apartments count and existing pharmacies points. Then I made two raster ...
6
votes
2answers
220 views

Heatmap of sold homes with constant cell size?

QGIS version 2.18.5 I'm working with annual house prices in England and Wales with excel columns as: A; Transfer Price B; Postcode C; Lat D; Long. There is approx 400,000 rows of data for 2011. I'm ...
6
votes
2answers
460 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
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++ ...
6
votes
1answer
317 views

Heatmap Renderer with Feature Layer

I have a set of data held in a backend database that I wish to render into a heatmap using esri. The data is dynamic based on users search and filters. I'm creating the feature layer and applying the ...
6
votes
1answer
5k views

Enabling all layers by default using Leaflet?

I am using leaflet maps to compare heat layer and marker layer. I've an option to add multiple marker and heat layers dynamically. For me Heat layers are enabled by default as on when user adds new ...
6
votes
2answers
2k views

What are best practices to compare densities and locations between two sets of points?

I have two sets of point shapefiles. They represent two different customer groups for a retail store. Shapefile A represents online customers, Shapefile B represents in-store customers. What I ...
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 ...
5
votes
3answers
3k views

Where is the Heatmap Plugin

I have read the questions about creating heatmaps but I cannot find the Heatmap Plugin in any of the repositories or using the fetch python plugins, it simply is not there. Could someone please tell ...
5
votes
1answer
139 views

Switch between heatmap and single symbol renderer at different zoom level in QGIS?

On a point layer in QGIS, I would like to display the points as normal single symbol points up to 1:5000 and switch to heatmap map between 1:5000 and 1:1000. Is it possible? I can't seem to find this ...
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 ...
5
votes
1answer
402 views

How to create a heatmap using values?

How do I create a 'heatmap' in QGIS based on the values of the different points? I did do this once before with rainfall, but can't remember how!
5
votes
1answer
2k views

Geographic Heatmaps with Concentric Circles by Distance?

I'm looking to generate a geographic heatmap (using 'ggmap') that overlays some dimension (to start, housing prices) over the lat/lon near a city center. Then I want to create circles of equi-distant ...
5
votes
1answer
553 views

Getting Transparent Circles with Heatmap Plugin

With QGIS, I am trying to create a heatmap from a set of points I added as a layer using the "Add Delimited Text Layer" plugin. The points are a collection of complaints from around a city and I ...
5
votes
1answer
2k views

How is a geographic heat map different from a colored statistical thematic map?

From Wikipedia, A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors. Apparently, a geographic heat map is only one kind, ...
5
votes
1answer
1k views

How to create accurate heat maps and hot spot maps in QGIS? [closed]

I am mapping 5 heritage sites using DGPS point data. Each site has 100s, and in two cases 1000s, of points representing various attributes. I want to show the density of attributes and then ...
4
votes
3answers
2k views

How to create an intensive map of Russia using QGIS or any other software?

I am trying to create an intensive (heat) map of Russia. I have an Excel sheet of 36 Russian regions and their corresponding values. I know that there were similar questions: Creating map with ...
4
votes
3answers
1k views

What's the parameters of heatmap formula on QGIS?

I want to calculate the values by hand to know which parameters effect the result in the image, but i couldn't able to do that because i didn't understand it. I tried with 500 mt and 1000 mt radius ...
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 ...
4
votes
1answer
387 views

How to get the legend of a Vector heatmap layer in QGIS 2.14.4?

I'm new on QGIS and PyQGIS. I'm trying to create a plugin which aims to apply a style on a vector layer (generated from a csv file) and then save the map as a png file. The style I apply on the ...
4
votes
2answers
170 views

How to choose a GRASS kernel density function?

I'm starting to use the Grass module on QGIS, and I want to do a heatmap, so, I'm creating a new surface using the kernel function. But, GRASS come with 7 types of kernel functions, how do I know ...
4
votes
3answers
924 views

Heatmaps: right terms (isopleth vs choropleth, etc) and how to implement a value-based one that looks good? [closed]

NOTE: My original question was about interpolation methods, but I've found that I was actually asking the wrong question. Interpolation methods with Heatmaps and IDW are the least of my problems right ...
4
votes
1answer
248 views

QGIS Heatmap - Time Manager

I'm having problems creating a heatmap. I want to show the cumulative increase of points through time manager with heatmap symbology in QGIS 2.18.1 (through layer symbology, not the raster heatmap ...
4
votes
1answer
924 views

Plot a world heat map with mollweide projection in R

I have a data set with global observations with lat/lon information. There are 288 longitudes from -179.375 to 179.375 with spacing 1.25, 180 latitudes from -89.5 to 89.5 with spacing 1. There is one ...
4
votes
1answer
776 views

How to get counts from a table to produce a heatmap?

I am trying to create a heat map of doctors per zip code based on zip code. I have a table with the doctors and their zip codes, some of them repeating because there is more than one doctor per zip ...
4
votes
2answers
2k views

Can a Fusion Tables Heatmap be used in Google Earth?

From the Fusion Tables web interface there's an option to view a heatmap, which draws on top of Google Maps. From the Fusion Tables map view there's an option to Export To KML, which allows the ...