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.
421
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Point density at different zooms in Leaflet?
Searching for point density yields several threads on this website but none shed light on the problem I want to tackle. So, here goes…
I have a decent number of points, about ~500K, that I would like ...
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How to style Mapbox heatmap
I have this GeoJSON (can be downloaded here). The data is distributed through a grid, thus the points are distributed regularly.
However, each point has a different "weight" via the prop ...
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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 ...
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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 ...
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Generating values and creating heatmap from three different point vector layers in QGIS
In QGIS I would like to turn what I have into a heatmap.
I have 3 different sets of points that go across the map of the UK (see the image attached) that represent coastal marine habitats. What I want ...
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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 ...
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39
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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 ...
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42
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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 ...
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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 ...
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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 ...
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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 ...
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37
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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 ...
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675
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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 ...
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63
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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 ...
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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 ...
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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.
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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'...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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618
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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 ...
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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 ...
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338
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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 ...
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613
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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 ...
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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 ...
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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>...
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83
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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 ...
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482
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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 ...
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373
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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?
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340
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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: ...
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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 ...
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115
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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 '...
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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 ...
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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 ...
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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 ...
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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 ...
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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). ...
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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 ...
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604
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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 ...
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515
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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 ...
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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?
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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 ...
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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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760
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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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426
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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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<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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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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