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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8
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2answers
165 views
+250

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 ...
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0answers
40 views

Making Map with Color Ramp Using SQL Database Intergration?

This could be a trivial question, but I've been kind of stuck on it for awhile. I'm trying to construct multiple maps that reflect aggregated data showing overall risk by county in a SQL Database ...
52
votes
5answers
19k 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? ...
1
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0answers
36 views

Show large information in a map (millions of points)

I have millions of points (census data) about 1.5Gb in a text file. But I only want to show an area based on this points like a heat map, so maybe I have to build polygons based on these points. What ...
7
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1answer
913 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
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1answer
125 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 ...
1
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0answers
23 views

Conservation International Hotspot Data

I am creating a Heat Map and need Conservation Internationals's Biodiversity Hotspot Data in GIS form. I have tried to find the data online, but have since been unable. Where would I be able to find ...
2
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1answer
79 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, ...
1
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1answer
127 views

Using Google Map Spatial Reference to plot HeatMap?

Basically I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { var gradient = [ 'rgba(185, 185, 203, 0)', ...
3
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0answers
56 views

Thermal Map Data

I am curious about making a thermal map to display where the hot spots and where the cool spots in a community are. Obviously the roads will be hot and the shaded areas with trees will be cool but ...
2
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1answer
2k views

how to create a Heat-Map in ArcMap 10.1

Is there any tutorial about creating a heat-map in ArcMap 10.1?
1
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1answer
51 views

Why is interpolation adding too much heat

I am interpolating geo data using qgis. The data is in the form of lat,lon,count. The path of the collected data is shown as a mostly transparent line. The resulting heatmap it produces is shown. ...
0
votes
1answer
64 views

heat map / density map from dynamic points table in mapserver?

how can i create a heat map (some would call a density map) from a points layer in mapserver? (preferably able to choose interpolation method, NN, IDW, etc and color map with a transparent color) ...
1
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1answer
215 views

Converting Heatmap into Grid of Points to regenerate less accurate Heatmap?

Question: How do you take a heatmap generated using a GIS software (arcgis, qgis...) and convert it into a uniform grid array of points which can be used to regenerate the heatmap (although with ...
0
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0answers
33 views

Plot coordinates and draw a heat map on a GADM map

I am trying to plot insect Resistance data collected at multiple sites on a spatial GADM map. My data looks like this: I would like to build a heat map (with increasing resistance=increasing ...
0
votes
2answers
75 views

Identifying clusters of points within a given distance

So I have a database of lats/longs representing incidents occurring on or near roadways. My goal is to identify the street block areas with the highest number of incidents in the database. I don't ...
0
votes
1answer
30 views

Conditional formatting of grid cells based on specifict attribute

I'm using QGIS. I have a 29x30km grid. Every cell of the grid has its ID and every cell of the grid has an attribute "Population" ranged from 0 to 30000. What I would like to do, is to get some kind ...
1
vote
2answers
676 views

QGIS - Continuous buffer image [Heat Map]

Is it possible to have the representation like the one the heat-map like the figure below using QGIS? The way seems to use buffer options, but I do not know how. Does exist any plugin that helps? I am ...
1
vote
1answer
109 views

What exactly is the min/max of an extent? (QGIS heatmap plugin)

I'm having a hard time making the heatmap plugin do precisely what I want (namely, to make a heatmap showing not only points but an attribute of those points), and now I'm thinking that I may be ...
2
votes
3answers
78 views

How to identify concentrated areas with multiple point values to produce a “heat map” appearance

I have roughly 1.6 million points statewide with values ranging from 1 - 4. I'm looking to identify concentrations of points based on their values (1,2,3,4). I know there are several different routes ...
0
votes
1answer
69 views

Is it possible to use polygons to create heatmaps?

I hope I can explain my question clearly, so here it goes: I've been fiddling around with heatmaps on QGIS for a few days, but came across a small obstacle on my way. I have a dataset comprised of ...
2
votes
1answer
500 views

Contour Lines Raster Extraction

I've been playing with Mapbox's blog post about converting heat maps to contour lines, and I'm stuck at the extraction part of this process. I used the CSV plugin to create a vector layer of points, ...
0
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0answers
29 views

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 ...
1
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1answer
76 views

Can one batch-automate the creation of QGIS heatmaps?

I have 4k point shapefiles, from which I would like to generate heatmap TIFFs using the QGIS heatmap plugin (or a functional equivalent featuring triweigth, radius and cell size selection). Is there ...
1
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2answers
126 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 ...
0
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0answers
53 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 ...
0
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1answer
45 views

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?
4
votes
1answer
239 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 ...
0
votes
1answer
189 views

how to create temperature heat map on a web?

I'm work on a website of weather data . I need to make heat map with temperature data to show the status of temperature in the state my data(lat,lng,temp), I'm trying to work with Google maps but it ...
7
votes
1answer
341 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 ...
2
votes
2answers
253 views

Is it possible to generate a heatmap on the server-side using ArcGIS Server?

Using ArcGIS Server's JS API it is possible to generate a heatmap at runtime, as in the example at http://tmappsevents.esri.com/website/heatmap/index.html This requires having client-side access to ...
1
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0answers
38 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 ...
0
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0answers
75 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 ...
0
votes
1answer
100 views

Geoserver heatmap in meters rather than pixels

Is it possible to get the radius' density kernel of the heatmap in meters rather than in pixels? http://suite.opengeo.org/opengeo-docs/cartography/rt/heatmap.html If not, is there other alternatives ...
2
votes
1answer
169 views

ArcGIS Online heatmap

ArcGIS 10.2, ESRI Maps for MS Office Why a heatmap that was created in Excel and looks fine and is still fine on a preview of a map if I publish it it ArcGIS Online but turns into black points if I ...
2
votes
1answer
2k views

How to display relative concentration (heatmap) of point features in ArcMap?

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 ...
3
votes
2answers
233 views

Render data on top of Google Maps

I have an interpolated temperature data samples that covers a map evenly. The data is in the form of (lat,lon,temp). I want to render that data on top of google maps. I tried google heat maps and the ...
1
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1answer
416 views

Weighted heatmap analysis- density of points, vs density of weight variable

Was just wondering if anyone could help me with a problem. I'm trying to map wellbeing scores (out of 10), using locations from a survey of 15,000 households, using the HEatmap command in QGIS. It's ...
0
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0answers
412 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?
2
votes
1answer
91 views

heat map of density ratio of 2 layers of points

I have 2 vector layers of points: one with a point for each house in the city (thanks to osm.org), roughly equivalent to population one with a point for each case of cholera in the city I'm trying ...
1
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1answer
1k views

Leaflet Heatmap Dynamic data layer

I am trying to add heatmap layer to my map. I have tried the following plugin: http://www.patrick-wied.at/static/heatmapjs/example-heatmap-leaflet.html From this plugin the data came from ...
1
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0answers
99 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 ...
18
votes
4answers
2k views

How to create a 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 ...
4
votes
1answer
73 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 ...
0
votes
2answers
361 views

How to pass parameters to Geoserver Heatmap SLD

Hi I am trying to generate heatmap using Geoserver Transformation SLD. as mentioned on the page, It requires few parameters: data weightAttr radiusPixels pixelsPerCell outputBBOX outputWidth and ...
7
votes
2answers
2k 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 ...
1
vote
0answers
36 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 ...
1
vote
2answers
88 views

How do I adjust transparency on heatmap so that I can see background raster map? QGIS 1.8.0

I have created a raster heatmap for the first time, but I cant seem to adjust the transparency settings to let me see another background OS raster map beneath it. I have attempted to swap the ...
2
votes
1answer
81 views

Why do edits made in attribute table not show in associated layer? QGIS 1.8.0

I have compiled a heat map layer to display over a background raster map. I discovered that the heat map layer was incorrectly positioned because I had made an error in the coordinate entry fields of ...
7
votes
2answers
11k views

How to make heat maps?

It might beginner question regarding heat maps..I want to prepare the heat maps so what parameters are required for that?? I gone through following posts about heat map..but I did not get exact ...