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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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How to make a heatmap to show the distribution of attribute values more accurately?

I want to be able to create a heatmap that shows the distribution of the attributed "carbon" value within a merged layer. I have a merged vector point layer that represents the combination ...
Greeny's user avatar
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1 vote
1 answer
42 views

Making population density map in QGIS

I have a CSV file of Red Squirrel trail cam sightings. The file has multiple sightings for each trail cam location and includes date, time and location. Using the Heatmap symbology gives me a good ...
Vic's user avatar
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1 answer
34 views

How to generate values and create a heatmap from 3 different point vector layers in QGIS

I am new to QGIS and would like to turn what I have into a heatmap. I have 3 different sets of points that go across the map of a UK (see the image attached) that represent coastal marine habitats. ...
Greeny's user avatar
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LST calculation on Google Earth Engine (chunk of data is absent on map)

I am using Google Earth Engine to calculate LST using the Landsat 8 data for Durban, KZN in South Africa. However a chunk of the LST data is absent for a portion of my study area . The true image and ...
Karishta Basidawu's user avatar
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35 views

qgis2map not showing the assigned symbology

I have a basic heatmap created from point vector, but when I use qgis2web to send to my supervisor, the radius of the points is altered. This is my first time using this plugin, and cannot find ...
Aagwood's user avatar
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2 votes
0 answers
36 views

Filling in NULL data in vector grid with values derived from Nearest neighbour cell values

I have created a grid with 5m x 5m cells which contains the summed values from a point file. Within the grid I have NULL values (selected in Yellow) where there was no points within the cell, yet the ...
A Auld's user avatar
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4 votes
1 answer
132 views

Combining multiple point layers in a heat map not by density of specimens but by density of species

I'm trying to combine multiples point layers in a heatmap but I'm not sure that a heatmap is the best solution for my use. Each point layer correspond to locations of specimens for 1 specie. For some ...
Noyirox's user avatar
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1 answer
37 views

Understanding the output of Kernel Density Analysis

I want to create activity hotspot maps (heat maps) of bird pairs using the Kernel Density tool in ArcGIS Pro, but can not for the life of me make sense of the output values. I've read all the help ...
Antonia's user avatar
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0 answers
31 views

Heatmap with population and travel time using ArcGIS Pro

I have two different layers one which consists of polygons that represent travel time (15, 30, 45) and another which contains demographic information. I want to create a heat map similar to this that ...
A. Cervantes's user avatar
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2 answers
32 views

How to minimise effect of more sample size in QGIS

I am trying to create a heatmap of average temperatures the data is basically a CSV file with these items City Latitude Longitude Temperature Now when I style the layer as "Heatmap" the ...
Vinay's user avatar
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1 answer
442 views

Heatmap using latitude and longitude coordinates

I have a very large dataframe of +10Million rows containing information about route points of vessels in maritime traffic. I wanted to create a heatmap to highlight the areas with higher traffic flow ...
Coki_23's user avatar
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56 views

Removing isolated point "hotspots" from big point sample

I have about 60000 points (lat, lng) that I want to layer on a world map as a heat map. The problem is that there are some isolated point hotspots. Isolated here meaning they have only a few points ...
jonasmylesx's user avatar
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1 answer
39 views

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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0 votes
1 answer
119 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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1 vote
0 answers
26 views

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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0 answers
931 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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1 vote
0 answers
43 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
60 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 vote
1 answer
225 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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1 vote
2 answers
617 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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1 vote
0 answers
41 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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2 votes
1 answer
542 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
1 vote
1 answer
59 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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0 answers
303 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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0 votes
0 answers
575 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
  • 193
1 vote
1 answer
36 views

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
102 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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0 answers
83 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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0 answers
454 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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0 answers
368 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
317 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
  • 73.2k
-1 votes
1 answer
297 views

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
  • 13
0 votes
0 answers
111 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
235 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
180 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
  • 91
3 votes
2 answers
296 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
54 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
265 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
177 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
578 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
  • 638
-2 votes
1 answer
502 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
76 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
82 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
194 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
743 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
394 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
  • 197
3 votes
1 answer
206 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
384 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
69 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
173 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

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