A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors

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Fail to get heatmap from MULTIPOINT column of Spatialite layer in QGIS?

I got a heatmap from a POINT column of spatialite layer. But, when I made another heatmap from MULTIPOINT column, it was blank. What is the possible reason of this problem?
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218 views

How to properly use PostGIS with Maps

First time using PostGIS in an app. Target: - Get Heat Map of customers from address table using leaflet.js and heatmap.js Have DB called store_dev. Installed OSM Bright from Mapbox in it. Have a ...
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230 views

Using stat_density2d with coord_map in ggplot2

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 ...
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186 views

Can Nearest Neighbor Analysis help determine values for a Heat Map?

Given the below parameters (from Nearest Neighbor Analysis): A) Is there a definite range my Radius value should be within? B) Are there definite values my cell size should be near? C) Is there a ...
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159 views

How can I map polygon value distribution?

I'm surveying an area and have a z-value attached to each polygon. In comparison to the area I'm studying the polygons are quite small. What I'm trying to do is show the distribution of this value. ...
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31 views

What are problems & biases stemming from mathematics behind using Monte Carlo Markov Chain to make heatmap?

My buddy and I are using Monte Carlo Markov Chains to make a heat map - in the interest of rigour, and out of curiosity: "What are the problems & biases that stem from the mathematics behind ...
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84 views

Is there an analog to ArcGIS' “Neighborhood Toolset > Point Statistics” for QGIS?

Quick procedural question- is it possible to create a raster with QGIS in which the raster cell value is assigned by summing the number of vector points that are within a certain radial distance of ...
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30 views

Can I use the PyQgis QgisPluginLayer to create heatmaps?

I am working in an application to generate maps from a bunch of MIF/MID files, I already created almost all the maps that I need, but, now I want to create heatmaps. I can't find any way of creating ...
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94 views

Heatmap plugin with relatively small area

I'm trying to make a heatmap using points in a relatively small area (about 50km by 50km) and I just get a single red block every time (even after switching the color map to 'pseudocolor'). I've read ...
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210 views

Looking for .NET Heat Map API / SDK

I have a requirement to add a 'heat map' style layer to a Javascript/jQuery based application that I am working on. So far, I have used heatmap.js with no problems at all. My only concern with this ...
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Crash upon heatmap

I am completely new to qgis. I am trying to generate some heatmaps from crime data... and failing miserably. I have tried with my own data and the data in the heatmap guide here ...
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29 views

Why does heatmap size vary with number of points

I am making three heatmaps based on points over the same area and don’t understand why the number of rows and columns would vary depending on the number of features. The first feature set has 398 ...
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46 views

Heatmap processed on the whole layer / dataset

How can I process the geoserver heatmap on my whole database rather than on the displayed part of it? What I want is to keep the same color for each place, everytime. Here is an illustration of what ...
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openlayers heatmap - Object doesn't support removeBackBuffer()

Followed the latest heatmap openlayers example http://www.patrick-wied.at/static/heatmapjs/example-heatmap-openlayers.html using Visual Studio 2012 MVC 4.0 JQuery 1.7.1, the system reported "Object ...
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172 views

create heatmap with heatmap.js based on attributes

I am trying to use heatmap.js in my project (with Arcgis 10.1 server).. as per the samples given in the ESRI site http://blogs.esri.com/esri/arcgis/2012/09/26/heat-up-your-webmaps/ everything works ...
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73 views

What vector file type yields the greatest detail with the Heat Map plugin?

I'm using .shp files built from .csv files and having quirky results. Perhaps there is a better way to begin. The heat map appears to be accurately describing the data but calculates a huge area in ...
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349 views

How to display Heatmap in Internet Explorer 7 using ArcGIS JavaScript API?

Trying to find a solution to heat maps on IE7/IE8 (i.e. not using Canvas/HTML5/heatmapapi). Any ideas?