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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Heatmap using lines in shapefile in QGIS

I used openrouteservice to produce routes from many points to one point. I would like to add some sort of heatmap scheme to this - supposedly blue for least popular routes and red for routes with most ...
jd6915's user avatar
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46 views

Create heatmap polygons shapefile from a points shapefile for a variable in attribute table in R

The objective is to create heatmap polygons from a points shapefile named "df_sf" for an attribute "V1" in the shapefile and then export these polygons as another shapefile in R. ...
vp_050's user avatar
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Generating areas of agglomerations in response to EUs proposed definition of "10 p.e per hectare or above"

In regards to EUs proposed updated Urban Wastewater Treatment Directive, the definition of agglomeration is proposed to be areas of 10 p.e. (population equivalents) per hectare or above. (page 36). I'...
SO_'s user avatar
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How to invert a Heatmap

I Have a few polygons and I created centroids from them. Then I created a Distance Matrix with the point in the middle being the point I measured the distance from all the green surrounding points. ...
QGuy's user avatar
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680 views

Developing Heatmap using Next.js and react-leaflet

For a research project, I was tasked to develop a GIS very similar to https://cwfis.cfs.nrcan.gc.ca/interactive-map. This is the first time I will develop a GIS-related web application and I do not ...
Sonny's user avatar
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33 views

extract contours based on percentiles from QGIS heatmap

I have created a heatmap/kernal density estimation in QGIS. I now want to extract contours for the 75th and 90th percentile. How would I go about doing this? I have attached an image of what my KDE ...
Ami Jess Northam's user avatar
1 vote
1 answer
54 views

Improving kriging results from transect data

I have estimates of fish density along transects from a lake and would like to extrapolate these estimates for the entire lake surface, using kriging methods. Based on information from here, here and ...
M.Teich's user avatar
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1 answer
140 views

Count overlapping polygons but with "assigned scores" in the shapefile layer

Basically, I have my IUCN species distribution layers. I initially created a heat map with overlapping polygons (Count overlapping polygons tool) but that just gives me the species richness. I thought ...
NLS's user avatar
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2 answers
354 views

Elongation problem with Seaborn's Kdeplot

I am currently working on creating a Kernel density estimation (Seaborn's Kdeplot) visualization of point cloud data between two countries. However, I have encountered a problem for which I need some ...
Micki's user avatar
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33 views

Set heatmap radius to field or attribute value in QGIS 3.18

I'm using a heatmap to visualize the peak ground acceleration of a seismic event. Each station coordinate has the peak acceleration value and a radius of influence of the zone. I'm trying to set the ...
JoeAA's user avatar
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Display of bivariant data with a magnitude and intensity

I am trying to produce a heat map display. I am wanting to display two dependent data sets (flow rate & gas % at a well point) as a single heat map. The zone of influence is a 20m radius scaled to ...
Alison M's user avatar
2 votes
1 answer
309 views

Convert QGIS heatmap raster output to vector

I am quite new to QGIS and I am trying to create a species distribution map using public reporting data. I can very easily generate a heatmap by first converting the pentad data to vector centroid ...
Bryce Foster's user avatar
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252 views

Heatmap in OpenLayers

Each discrete data point is classified into increasing levels of severity: '1' (green), '2' (blue), and '3' (red). I would like to do something like this example. I am trying to be able to distinguish ...
Aayush Subedi's user avatar
1 vote
1 answer
41 views

Converting heat map to .asc file using QGIS

I have produced a number of heat maps using QGIS and I am hoping to compare their overlap using fuzzy kappa from Map Comparison Kit 3. However, the program only accepts .asc files or .log files for ...
Tom Johnson's user avatar
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132 views

Guidance on using changing symbology in heatmap

I am symbolizing a kernel density layer that I made with my points data. Using the same data, I've made several heat maps that show varying results. In my search for an answer, it appears classify and ...
user223848's user avatar
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204 views

Heat map in ArcGIS Pro based on attributes not density

I am trying to create a heat map based on point attribute values, not density. Do you know how to do this? I have tried making heat maps, then using kernel density selecting the attribute as my ...
Carole's user avatar
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431 views

Weighted 2D kernel density heatmap in R

I have visual observations from repeat transect surveys (individual sighting locations based on bearing and distance to transect) that I use to create 2D kernel density heatmaps. Currently I do so ...
Anke's user avatar
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1 answer
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How to colour categorise population estimates using GRID3 Settlement Extents in ArcGIS Pro [closed]

I am new to ArcGIS Pro and geospatial data in general. I have downloaded settlement extents data from https://grid3.org/. I had naively thought the data would display the population in a heatmap like ...
Mizzlwe's user avatar
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1 vote
0 answers
82 views

QGIS: Making a heatmap which doesn't look at point density

I have a file of postcodes (x and y co-ords, and a percent value for what I'm measuring). In some areas there are a lot of postcodes, in others very few. I can use the heatmap option in properties>...
Martin burroughs's user avatar
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76 views

Red Amber Green colour system for point cluster map in QGIS

I have a point cluster map of collisions occurred in an area, that shows all the cluster numbers in the same symbol/colour- however i want to create a map with the cluster colour updating according ...
Hyde Chiu's user avatar
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385 views

Getting gradient thresholds OpenLayers heatmap?

I develop an application that displays results of the measurements of pollutants in snow. Due to large size of the area (lake Baikal), it is difficult to take samples everywhere, so I was asked to ...
Rulisp's user avatar
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342 views

kernel density estimation in qgis plugin?

I have tried using animove plugin, but it keeps coming up with errors, is there a way to do a kernal density estimation for 50% and 95% in qgis for point data?
Alex 's user avatar
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2 votes
0 answers
256 views

Heatmap changes to single color when zooming out in QGIS

Working with QGIS 3.28, I have a point layer with several million points. Using heatmap renderer, I get the left heatmap with these settings: scale 1.100.000 radius 200 meters at scale Maximum value: ...
Babel's user avatar
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1 answer
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Calling multiple leaflets of unique shapefiles and data frames on the same map in R

I am visualizing population heat maps for the commission districts of thirty Florida counties using Leaflet, but I can't figure out how to call them on the same leaflet map with the same population ...
mmc's user avatar
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0 answers
98 views

Creating heat/proximity map from vector line data

I wish to create a population pressure map using vector line data (roads), to assess forest degradation pressure using QGIS. I need a 'line density' raster output, that works in a similar way to the '...
Werafa's user avatar
  • 138
1 vote
1 answer
212 views

Mapping Census data on non-Census shapefile polygons using R

Using R, I am trying to create a heat map of population in the five county commission districts in Alachua County, Florida, by merging total population data at the block level from the Census with the ...
mmc's user avatar
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1 vote
2 answers
160 views

Creating Graduated heatmap

I am completely new to QGIS. The problem I have is not knowing if the data I have currently can produce the results of image 2, And if not what I need, or point me in the right direction. Data I have ...
Shadow's user avatar
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3 votes
2 answers
275 views

Create series of heatmaps for each year in QGIS

I'm working with QGIS 3.22.10-Białowieża and I've got a point layer with the attribute year. I need to create a series of heatmaps, one for each year, but I haven't found any filtering option in the ...
jpinilla's user avatar
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1 vote
0 answers
51 views

Heatmap creation

I am trying to create heatmaps showing potential savings/costs within a certain area. however when I go on to the heatmap creation, My advanced parameters do not let me select further options for the ...
Peter's user avatar
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2 votes
0 answers
211 views

Difference between Heatmap in QGIS and Kernel Density in SAGA

I'm trying to migrate my workflow from QGIS to SAGA so that I can automate it from the command line or a standalone Python script. Part of the workflow is running a KDE (or rather, a series of KDEs). ...
Carl Peterson's user avatar
1 vote
0 answers
143 views

QGIS: Heatmap of polutant data using contour polygons

1. ASSIGNMENT I have got an even grid of points (figure 1) with attributes of the values of emissions or pollutants caused by traffic - modelled in a specialised SW for this. I need to use this point ...
Roman Dostál's user avatar
2 votes
1 answer
451 views

Create heatmap and output to raster or shapefile

I am trying to create heatmap with spatial data to display on GeoServer. Please note that it should be smooth by some kernel density estimations and not a simple count. Looks like the geoplot.kdeplot ...
Shana's user avatar
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-2 votes
1 answer
445 views

Trajectory density map or line density map

Data: ships AIS trajectory Data with longitude and latitude. (that data is a CSV file with several columns:id,time,lon,lat,etc.)// I transform the point to line, every line is a ship trajectory. Now I ...
Zhenyun Sun's user avatar
1 vote
1 answer
69 views

Mergin plugin options

Can I use the points created from field study via free Input App on Iphone, and Synchronize them into free QGIS, and then use these points in creating a heatmap on QGIS?
Sara's user avatar
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0 votes
1 answer
62 views

GeoServer style based on number points returned

I have a point layer with many points. I am filtering these points from the frontend application (OpenLayers+Angular) with multiple filtering options (dropdowns, checkboxes, etc.) using CQL_FILTER ...
juraj murcko's user avatar
1 vote
0 answers
153 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 ...
ZHTank's user avatar
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1 vote
0 answers
665 views

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, ...
wayne r's user avatar
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1 vote
1 answer
362 views

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" ...
Manard82's user avatar
  • 187
3 votes
1 answer
183 views

<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 ...
user203217's user avatar
1 vote
1 answer
352 views

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 ...
pawaelus's user avatar
  • 351
4 votes
0 answers
65 views

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 ...
Luca's user avatar
  • 41
1 vote
1 answer
150 views

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, ...
Myaccount's user avatar
1 vote
0 answers
123 views

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 ...
Fabian van Hummel's user avatar
0 votes
1 answer
2k 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("...
user199125's user avatar
2 votes
1 answer
305 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 ...
Natasha REG's user avatar
0 votes
1 answer
106 views

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?...
eliangius's user avatar
  • 275
4 votes
1 answer
398 views

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 (...
Michael's user avatar
  • 171
3 votes
1 answer
2k 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 ...
MaxDragonheart's user avatar
0 votes
1 answer
155 views

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 ...
gwfami's user avatar
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1 vote
0 answers
178 views

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-...
wesleysc352's user avatar

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