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.

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What is unit of Heatmap (Kernel Density Estimation)? [duplicate]

I want to calculate a housing density using a points layer in the “WGS84 / UTM zone 56S” projection, setting the parameters as follows: RADIUS = 1000 PIXEL_SIZE = 100 KERNEL = “Quartic” OUTPUT_VALUE =...
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34 views

QGIS Handling Heatmap Data Range

I have a grid of hexagons with data (ranging between 0 and 1) and, using the centroids of the hexagons as a base, I would like to visualise the data as a heatmap. On the technical side, this works ...
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Method of interpolation to create weighted heatmap rasters in R from point data

I want to create a geospatial heatmap that is weighted by a specific variable sourced from georeferenced points. An example dataset is 'us_states' from the 'spData' package. I want to take this data, ...
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Display a Leaflet Heatmap with a gpx file and Omnivore

I first displayed a Leaflet Heatmap with the plugin : "leaflet-heat.js" and a geojson file with this code found on Gis.Stackexchange var geoJsonUrl = "link to the geojson file" ...
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3 votes
1 answer
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<geotools/HeatmapProcess> convert GridCoverage2d to BufferedImage

I got the heatmapprocessTest code from geotools github However, I can't confirm that the heat map is coming out well. Ultimately I want to create and save the heatmap as a BufferedImage. (png) For ...
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1 vote
1 answer
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Cesium and GeoServer WMS heatmap

I've got problem with a WMS heatmap layer in cesium. I know how to handle it in OpenLayers (single tile) and in Leaflet (non tiled plugin) but I don't know how to handle it on 3D globe. Here is my ...
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4 votes
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Making weight heatmap on recurring event in points layer using QGIS

I have a heatmap created on a points layer of deer-vehicle collision. Now, I want to weight the heatmap on the recurring of crash in the same area in different years. I would give weight 0 if a point ...
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1 answer
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Area based Heatmap (QGIS)

I am new to QGIS. I am trying to create a heat map based on area not points. What I want to acheive is similar to this question. I want to create a binary raster (0 for no point, 1 for point). Then, ...
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1 vote
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Making a heatmap with ArcGIS API for JS while using a Graphics collection as source

I am trying to make a heatmap from congestion data in the distribution network for electricity. I use a collection of Graphics as the source for a FeatureLayer and add the heatmap accordingly. It all ...
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354 views

Folium and heatmap is not opening in pycharm

I'm using PyCharm version 3.7. When I tried to open simple folium map I'm not getting any output. I tried something like this import folium import pandas as pd import csv dataframe=pd.read_csv("...
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2 votes
1 answer
38 views

What do gradient stops' relative positions on colour ramp (%) signify when using QGIS heat map tool?

I'm using QGIS 3.18 heatmap tool to visualise the space use patterns of chimpanzees for my master's dissertation. I import each chimpanzees coordinates as a csv file and then change the layer's ...
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1 answer
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Reproduce QGIS vector heat-maps via kernel density rasters

I would like to reproduce the vector heat-maps generated through the user interface but via the pyqgis heat-map kernel density tool instead. Does anyone know the equivalent parameters? or styling code?...
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4 votes
1 answer
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Absolute positions for Color Ramp gradient stops in heat map?

I'm using QGIS 3 and trying to create a heat map using GPS data acquired during various trips. I want the resulting heatmap to clearly show each location acquired at least once with some radius (...
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3 votes
1 answer
203 views

Creating heatmap from vector tiles using OpenLayers

I know that is possible to make a heatmap using ol/layer/Heatmap, but this component accept as source only ol/source/Vector component. Someone have build a heatmap using VectorTile as source? Can you ...
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1 answer
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Gettting data from georeferenced PNG QGIS

I'm working on a predictive system and was able to locate a PNG from another researcher showing a heat map of Oklahoma. I was able to georeference the PNG and bring it into QGIS 3.22. What I need to ...
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How to generate heat map (kernel map) from polygon geometries in QGIS?

I have a polygon type shapefile with the total number of reptiles in 7 regions of my city, I would like to generate a heat map (kernel map) from this shapefile. QGIS only generates heatmaps from point-...
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2 votes
1 answer
60 views

Problems animating heatmap in QGIS temporal controller

(QGIS 3.20) I am having trouble getting my heatmap to animate properly using temporal controller. I am using a point layer with many points in the same location so a heatmap would really help ...
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Which analysis to use? Analysing points' likeness across multiple fields including proximity. (AHP?)

I don't have much of a background in coding. I have a point layer with 400 points. The attribute table contains 3 fields of interest: Bearing (values between 0-180); a Ratio (ratio of ellipse long/...
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3 votes
2 answers
139 views

Heat Map - Cover non-point areas QGIS

I am doing a heat map of the density of schools within a specific area of a city. Right now, I have this: I would like to create a more formal map in which the white non-coloured aspects are coloured ...
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Does qgis2web plugin support heatmap symbology for a point layer?

I am trying to create a web page from QGIS using qgis2web plugin. I have a point layer and when I render its symbology as single symbol, it gets successfully exported to a web page when I used leaflet....
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How to make a heat map based on Grid layer in QGIS

The way this image is displayed is very clear, it shows the correlation of two (or more) attributes in space. This picture should be drawn in Arcgis, it should be a combination of grid layer, polygon ...
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111 views

Interpolating 0-1 (presence / absence) point data in a vector using QGIS "3.20"

I would like to make a heatmap using presence absence data (imported as a CSV file) for koalas but I can't work out how to do it. Here is the raw data (presence ) map This is the kind of map I ...
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1 vote
1 answer
54 views

Heatmap based on numeric attributes, not on density for line representation using QGIS

I have a number of points on a map, each with a numeric attribute taking values from 1-9. The points with attribute equal 1 should have the highest density representation, and the points with ...
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Making heatmap points full opacity regardless of weight using OpenLayers

As shown in this example, when the blur is set to 0, the opacity of each point correlates to the weight, and the opacity parameter is layered on top of the weight opacity. Here is an example image of ...
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1 vote
1 answer
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OpenLayers: Change point colour to indicate number of overlapping points

I would like to have a heatmap that represents the number of overlapping points, basically to achieve the exact same thing as in this post, but in OpenLayers. At the moment I'm using opacity as an ...
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1 vote
0 answers
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Heatmap with Contour Polygons

I have point data off the coast of Oahu. Someone else used these same data to create two polygons (approximated by me in the figure below with the green and red hand-drawn boundary lines). I believe ...
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84 views

Combining GPX tracks in QGIS

I have several GPX tracks on the same road and I would like to average out a heatmap of velocities from these GPX tracks on this road. I think I figured out a way to do this in QGIS - in theory. I ...
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3 votes
1 answer
99 views

Is there a function in PyQGIS (QGIS 3.10) similar to the ''slice" function in ArcPy?

I am working on a script that automatically generates heatmaps from point data. I am aware of the heatmap/KDE tool already existing in PyQGIS (I am working in QGIS 3.10). What I want to do after ...
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2 votes
1 answer
2k views

Using geometry points to get data in order to plot heatmap?

Excuse me if the title is confusing, English is not my main language, I'll try to explain myself as best as possible, also, I'm not great graphing, I'm learning. My code plots points on a shapefile ...
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1 vote
0 answers
40 views

Coloring heat map, with custom characteristics

I need to color a "heat map", with these characteristics: "Pseudocolor monoband", "Discrete" and with two levels: <= "STATISTICS_MEAN" -> Color 255/255/...
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What do the quantitative values for the colour ramp gradient for heatmap style in the layer properties for QGIS signify?

I would like to understand whether any quantitative values can be extracted when using the heatmap style in the layer properties? I assume areas with colours related to 1 are areas which have the ...
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0 votes
1 answer
142 views

QGIS Heatmap not available?

I'm using QGIS Version 3.16.4. I thought one can do heatmaps by going to the properties of a layer and selecting it under symbolization. But as you can see, it's not available in the dropdown menu. ...
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3 votes
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Automatically adding increasing transparency values to gradient stops in QGIS

I have a point layer in QGIS 3.14 on which I applied a heatmap symbology based on an intensity attribute (here a price value): But the heatmap colors extends all over the basemap layer, covering it ...
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1 vote
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Adding a well discernible symbol on top of a heat map in QGIS without duplicating a point layer

I have a point layer in QGIS 3.14 on which I applied a heat map symbology: I would like to add a well defined / discernible shape (circles here) on top of the heatmap for the underlying points to ...
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  • 6,698
2 votes
1 answer
123 views

Assigning a weight to thousands of values in the attribute table to then make a heat map in QGIS 3.10

I am working with some data that has about 19,000 values. This data has been imported as a text delimited file layer, as it is GPS (long and lat) point value data, that has an associated metadata or ...
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1 vote
1 answer
184 views

How to create a heatmap from overlapping polygons using ArcGIS Server JavaScript API?

Using the ArcGIS Server JavaScript API version 4.18, how can I visually highlight areas with high concentrations of overlapping polygons, such as these historical cyclone tracks? In addition I need ...
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0 votes
1 answer
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Heat Map using a Date Range in QGIS 3.16.3 [closed]

I'm new to QGIS and I'm trying to make a Heat map with roughly 2000 data points using a date range. What I'm wanting is for the newer date to be the "hot" portion of my map. I've tried to ...
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2 votes
1 answer
1k views

Why won't ggplot fill heat map using geom_tile in R?

I am trying to emulate some geom_tile plots I saw in a research paper. The plots were created with simulated data. Below I created a dataframe of "dummy data" using a subset of the actual ...
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3 votes
2 answers
151 views

How to make a Heat Map of Distance between a set of parallel lines in QGIS?

How to make a Heat Map of Distance between a set of parallel lines in QGIS? This question is an extension of Question posted on the following link: Distance between multiple parallel lines? I have a ...
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1 vote
0 answers
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How do I combine heatmaps in QGIS?

I'm trying to create a view of two heatmaps in the same time with QGIS. I tried following the suggestion on this thread: Can I combine two heat-maps in QGIS? But it didn't work. The virtual layer ...
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Why is heatmap turning red in QGIS

I'm using QGIS 3.16.1. I'm creating a heatmap using the symbology. At first it appears like a normal heatmap, but it is still rendering. When it finishes the whole heatmap turns red. Here's a ...
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-2 votes
1 answer
582 views

What causes the "could not create destination layer" error when creating a heatmap?

I'm using QGIS 3.16.1. When I try to make a heatmap I got an error message saying "Could not create destination layer." I then tried using a smaller row and column size, and it runs the ...
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1 vote
1 answer
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Why is my heatmap not projecting?

I have been having a lot of issues trying to do a heatmap. At first the data would disappear when I created it, so I figured out that I had to reproject the CRS. I reprojected it, ran the heatmap, ...
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-1 votes
1 answer
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Why does my heatmap only give "degrees" as an option?

I'm trying to create a heatmap of a layer. I'm not sure what I should set the radius at, but it only gives me "degrees" as an option, instead of meters, feet, or other distance units. I ...
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1 vote
1 answer
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Create a heatmap with R for printed media

I am looking for a way to represent density points using heatmaps in R for printed media (e.g. using Rmarkdown to generate a PDF). The map should have a basemap (OpenStreetMap or Stammen) and instead ...
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1 vote
1 answer
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PyQGIS CRS projection issue when converting shapefile to heatmap

I am trying to create a Python script that runs in the QGIS Python Console and uses the QGS API to create KDE heatmaps from shapefiles. The shapefiles can come in any number of CRS's but the heatmaps ...
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0 votes
1 answer
157 views

Kernel density estimation for frequency data on polygon level

I would like to make kernel density estimations for a variety of influencing factors on crime, but I do only have frequency data on polygon level, e.g. number of drug markets on county level. For all ...
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2 votes
1 answer
81 views

Influence of heatmap on point data

I´ve got a quite specific question and hope someone understand what I want. I´ve got two datasets (point-shapes): Camera traps which gained data of roe deer on forest meadows Camera traps which ...
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1 vote
1 answer
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Creating heat map based on attribute from another layer in QGIS

I have a layer showing different trails in a nature areal. For each trail, there is an attribute with the usage of the trail (no. of people passing a trail counter). I now want to create a new layer ...
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2 votes
0 answers
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Having trouble with the Heatmap's (Kernel Density Estimation-KDE) interpretation in QGIS 3.10

i wanted to generate a density/concentration map of a parameter, in this case Carbon percentage in a water sample. The dataset in csv file looks like these : So, I imported the csv file then plotted ...
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