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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Server-side map generation from postGIS database

I have loaded some OSM data into a postGIS database, using imposm. Now using this data base, I computed a value associated to every point of the map (could be anything, real-estate average price or ...
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23 views

Torque heatmap on CartoDB with time control

I am interested in create a Torque Heatmap in which you can see the events occured every year in one step, for twelve years in total. Every event has a aggregation or ponderation value (they are the ...
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10 views

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

I've been trying to use the heatmap plugin on QGIS (2.8.2) on Ubuntu but the drop down for the output formats doesn't get populated. Selecting the drop-down allows me to press OK on the plugin popup ...
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1answer
20 views

Error loading heatmap layer using cartodb.js

I'm trying to load a heatmap layer using cartodb.js, but it is failing whether I use createVis or the manual way. Using createVis: cartodb.createVis('mapDIV', 'https://PATH/viz.json'); Building a ...
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42 views

Visualizing overlapping polygons by occurence

I work in a library providing geospatial services and I have a patron with about 60 surveys with perceived accent regions in Mexico. Individuals drew on maps where they think people speak with ...
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1answer
57 views

Heat Map not showing up QGIS [duplicate]

I'm fairly new to QGIS and I'm trying to use Heatmap. I should be doing every thing correct. But when I click OK for it to generate a heatmap, there is no Heatmap at all (nothing changes). For the ...
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38 views

Coordinates heat map results are not the same as the shapefile [duplicate]

I have done with a heat map shapefiles as shown below. But the results of heat map coordinates are not the same as the coordinates of shapefiles. Is there a procedure that is wrong?
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37 views

Display heat map using Json on Cesium with CartoDB

I want to create a heat map by using Json data on Cesium. And I want to use a CartoDB layer filled with Jquery's way of getting Json. And display the data on the Cesium 3D Globe. Most of work is done ...
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23 views

Heat Map with species distribution [closed]

what I am trying to do is to generate a heat map depicting the spatial distribution of certain species found in a lake, in association with their sex. For example, species_a+male or species_b+female ...
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35 views

How to make the value showing on a leaflet heatmap like this one?

I'm attempting to use leaftlet.js, and heatmap.js (github.com/pa7/heatmap.js/) following this example: www.patrick-wied.at/static/heatmapjs/example-heatmap-leaflet.html But I want to show the value ...
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1answer
48 views

How do I read and modify heat map value classification on QGIS?

I am trying to create a heat map on human encroachment using the heatmap plugin of QGIS 2.2. I have no problems creating a good looking raster file using a 2 km radius but I can't find my way around ...
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46 views

Density Heat Maps using R

I recently have been reading about mapping GIS information in R. I have 2 data sets from work. Without going into too much detail, the first data set is a list of failures with Geo Codes, the second ...
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36 views

Gradient fill based on scores (similar to elevation)

I'm rather new to using GIS (QGIS, specifically). I've mapped out a cohort of around 550 patients across Long Island, New York based on their full address by using MMQGIS plugin. This data is ...
2
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1answer
67 views

Draw heatmap only over water layer using Leaflet?

I need to draw a heatmap, but only over water because I want to represent water heat level. I am using Leaflet. How can I do it? I found an only-water layer, maybe it would be usefult for developing ...
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0answers
24 views

QGIS heatmap misplaced over dataset [duplicate]

First of all I'm a complete noob when it comes to QGIS so maybe thats the reason why I cannot find anything on this on google (or is this due to the 2.8.1 compatebility issue?). My issue is that when ...
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0answers
24 views

Problem with QGIS Heatmap Plugin [duplicate]

I am experiencing some issues with the Heatmap Plugin (0.2) on QGIS 2.8.1, and I wanted to double-check if I am doing something wrong, or if there is some sort of bug lying around. As a background, I ...
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37 views

heatmap dislocated when generated [duplicate]

QGIS 2.8.1 Does anyone have the answer to why a generated heatmap appears without coordinates and therefore is not on top of the vectorlayer that it was generated from? I checked the CRS setting but ...
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1answer
69 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 ...
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1answer
68 views

Sublayers or Multiple Visualizations for CartoDB

I'm trying to learn a bit of CartoDB by creating a heatmap using crime data available on the city's website where the raw number of crimes are displayed for each police district. So far I've been ...
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1answer
91 views

Trouble with heatmap plugin in 2.6.1

When using the heatmap plugin, I am getting some insanely large numbers for the cell size field when setting the radius to 5000. I know that rows and columns are related to cell size x and cell size ...
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32 views

ESRI JavaScript HeatmapRenderer class and Print widget

I’m working on an application using ESRI’s HeatMapRenderer class from the JavaScript API. The issue that I am running into is that the Print widget fails if the heat map renderer layer is on the map. ...
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43 views

OpenLayers3 Heatmap: Which are the availables geotypes to load?

I'm developing a heatmap and I'm trying some of the availables libraries. Leaflet GoogleMaps OpenLayers I'm using a geoJson file with several amounts of points. Since Leaflet allow me to assing a ...
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1answer
39 views

How can I get temperature data for each Countries?

I need maximum and minimum temperature data of each countries. I searched a lot but could not find the values. Could you give links if it is possible?
2
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1answer
46 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 ...
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113 views

Error while passing geojson data to leaflet heatmap

I am using following set of code for converting geoJson data into Heatmap format and passing to L.heatLayer extends of leaflet. While using this function to fetch the data...I get this following ...
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2answers
94 views

Intensity map based on a value of the each record

If I have geolocalized records with a simple true/false value for a field with title "Do you like flowers?" How can I draw a map that shows me in which areas people like flowers more than in which ...
2
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1answer
152 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 ...
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2answers
72 views

Create map(s) to help determine site selection

I have the task of creating a map in which the objective would be to help determine a site for a conference. I have the following data: Addresses of possible conference attendees (I have already ...
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1answer
60 views

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

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 ...
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32 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 ...
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1answer
181 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 ...
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77 views

Hot Spot Analysis

I'm using ArcMap 10.2- I've got a series of coordinate points, each with an associated value (level of income) that I would like to turn into a heatmap. I've projected the points onto a map, run the ...
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1answer
60 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 ...
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1answer
132 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 ...
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1answer
57 views

How to create heatmaps with small radius?

I am trying to visualize a set of pois on a map with the qgis heatmap plugin. It works great with a big radius but the layer is invisible for a small one (around 100 meters). I really need a small ...
2
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71 views

Overlapping Polygons

I have a project that requires us to plot floods in a certain area, the example below shows the flood areas. What I would like to know is how would I be able to shows these polygons in a better ...
2
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2answers
87 views

QGIS Heatmap plugin how to convert resulting raster values to meaningful values for legend

I am using QGIS and heatmap plugin and I need help with finding the meaning of the resulting raster values. I know there have been some questions, but none of them helped. This is my point layer input ...
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0answers
136 views

Generating Heat Maps with GeoHash

I have a long list of GeoHash codes for a certain geographic region. I'm using 6-character precision so for example if the area under study was Earl's Court in London, I would have a few six letter ...
2
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1answer
411 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
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175 views

How to plot heatmap/locations in Geoserver & Openlayers map from the Lat/Lon data of PostGIS table?

I am using Geoserver, Openlayers, PostGIS for Geospatial web implemenation. I have an Indian map shape files for States, Districts, Talukas. I am able to generate a map with states, districts, ...
4
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1answer
103 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 ...
2
votes
1answer
192 views

QGIS 2.4 Heatmap Plugin Generates a Solid Black Map

I'm trying to generate a heatmap of vehicle-pedestrian collisions in Los Angeles using data taken from UC Berekely TIMS. TIMS provides an exhaustive database of traffic accidents involving injury in ...
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146 views

Openlayers heat map not displaying properly in html

I was wondering if you could help me with something I am trying?? Created a heatmap from a sql point table using sld in GeoServer. Displays fine as a preview:- It looks tiled when I publish it to ...
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51 views

Using Geoserver

I am new to GIS and interested in using Geoserver. I have had a look at tutorials and read some books on this but still feeling clueless. I intend to use C# to accomplish some tasks eg, plot points on ...
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0answers
115 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 ...
9
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3answers
286 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 ...
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0answers
54 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 ...
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0answers
45 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
479 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, ...
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1answer
606 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)', ...