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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30 views

Creating heatmap from field/column in attribute table of shapefile in QGIS

I'm almost completely new to QGIS, so help would be greatly appreciated :). I have a layer from a shapefile loaded up into QGIS with a few thousand zones/features. There are also multiple fields/...
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19 views

LineString Heatmap with Open Layers 3

I need to make a heatmap with a bunch of linestrings using AngularJS and Open Layers 3. I didn't find any examples, just a question answered here but that don't worked for me. In the question he do a ...
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1answer
32 views

Heatmap based on values of points

I have these points on Energy performance and I want to create a heatmap in QGIS following the same logic in the colour scheme. I would like to create a heatmap ideally a vector or raster based on ...
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1answer
37 views

Altitude point layer to slope heatmap in QGIS

I have a vector point layer (grid of 100km x 50km, a point every 20meters = 12.500.000 points). It has an altitude attribute. I would like to have the information about the slope. I guess I need to ...
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0answers
21 views

Randomly filtering points in unevenly distributed point dataset?

I have a vegetation plots dataset which has unduly high concentrations of plots in certain parts of the dataset. I want to even out the concentrations of points so that there is a more even ...
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0answers
13 views

Create a temporal density maps (heatmap) using atlas

I tried to create a series of maps from a single layer of heatmap. I know I can do this manually through map composer but it is time consuming. My output data will look like this: Looked back at this ...
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2answers
172 views

Clip boundaries of heatmap according to another feature

Here is a heatmap in Leaflet (using heatmap.js and leaflet-heatmap.js) with hot spots that extend beyond the basemap boundaries: How would someone clip this? In QGIS or ArcMap you would follow a ...
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1answer
60 views

How can I make a heatmap of polygons using a graduated color scheme in QGIS?

I want to make a heat map of species biodiversity like the people did in the picture below. I can sort of get it to work by setting my layer with multiple polygon subclasses in the Layer styling panel ...
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1answer
45 views

Interpret a kernel density map for pollutants

I currently have a grid of values (concentration in ug/m^3) for a certain pollutant. I then converted each grid to a point to use as an input to the Kernel density analysis tool in ArcGIS pro. The ...
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1answer
39 views

Inserting only one band in Google Earth Engine and modify that band

I am trying to see the heat inside Laos watershed and I would like to only use Band 10 in Landsat image. But the watershed is located within the intersection of four different Landsat images. So if I ...
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0answers
69 views

Animating a heatmap over time using Google Maps API

I'm currently building a web application using flask and google maps api. I was wondering if it would be possible to create a page where user can select the time using a slider bar and the google ...
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0answers
71 views

Interactively Display Values of a Heatmap.js leaflet.js Heatmap Layer

In this example of the heatmap.js tool, I see how the values of the heatmap is returned by using heatmapINstance.getValueAt(): demoWrapper.onmousemove = function(ev) { var x = ev.layerX; var y =...
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2answers
95 views

Visualizing signal strength by location

I have a dataset which contains location and signal strength data from a field survey for a radio project I'm working on. An example: lat, lon, signal 34.123, -89.123, 55 34.124, -89.124,...
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1answer
71 views

Postgis/Postgresql - Interpolate equadistant points based on weighted attribution similar to QGIS Interpolation(Heatmap Kernal Density Estimation)

I have equadistant vector points, that are all 400m apart but only cover certain areas of a map that have a value of (1-5). In QGIS I can run the Kernel Density Estimation with my vector points to ...
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1answer
42 views

What are the bugs in this code using leaflet-heat + leaflet-sync?

I am trying to use Leaflet.Sync. I want to show in the first map, a heatmap created by projecting an array of points (by using Leaflet-Heat). And at the second map, I want to visualize the same array ...
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0answers
41 views

Heatmap of a large polyline dataset in QGIS

To summarize: I'm having difficulties with creating a heatmap from a large (90021-item) polyline dataset in QGIS 3.10.1. First, it is worth noting that this question is somewhat similar to Doing ...
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0answers
37 views

Delineating zones based on number of polygons that are in overlay

I am working in urbanism and I have a number of polygons that represent perimeters where certain "programs of revaluation" have been carried out. However, as can be seen on the map below, over time, ...
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1answer
105 views

Is it possible to create heatmap from layers of polygon geometry type?

I'm new to GIS and my question is whether I can create a heatmap from a layer with polygon (multipolygon) geometry. As far as I know, it is only possible to create a heatmap from layers with point and ...
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1answer
128 views

Creating a Heatmap of Delivery Probability in QGIS3

Im using QGIS 3.4.2 to create a heatmap to plot the source place where a network message is generated, in a vehicular network. I separated the messages in two groups, one in each layer: delivered and ...
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1answer
1k views

Folium - plugins.HeatMapWithTime no longer produces an output

I have been creating Heat Maps with a Time dimension using both test data and my own datasets using the Folium libraries in Python. I am using Python 3.5 to do this, and the results have been good. I ...
2
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1answer
66 views

Making heat map with joined layer using QGIS

I need to make a heat map with the number of cases by neighborhood. I have: a polygon shapefile with the neighborhoods, and a CSV file containing the name of the neighborhood and the number of ...
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1answer
122 views

Changing degrees to meters

I'm using QGIS 3.4.9. When I try to create a heatmap the only radius option is degrees. Can you tell me how to change this to meters?
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1answer
386 views

Plotting density map of points?

I have some points and I would like to plot the density map of them. I have tried like this: plt.figure() xedges = np.linspace(540000, 550000, 20) yedges = np.linspace(5200000, 5500000, 20) H, ...
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0answers
46 views

Creating interpolation maps in QGIS 3 [duplicate]

I'm trying to create an interpolation map visualizing the global distribution of genetic markers - basically replicating the attached map. Can it be done in QGIS 3.8 (Zanzibar)? I installed QGIS 3 ...
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1answer
394 views

Making heat map transparent in QGIS?

I am still new to QGIS. I have seen several tutorials but they seem to be concerned with earlier versions. The problem I have is that my heat map obscured any map beneath. I can see why this is, the ...
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0answers
83 views

Make biodiversity heatmap in QGIS out of polygons and not points

I would like to make a biodiversity heatmap in QGIS out of polygons and not points. I have a shape file made up of many overlapping polygons. I know how to make a heatmap with a set of points by using ...
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0answers
58 views

Multiple Spatial Point Patterns, create “average” heatmap

I am using R's spatstat package to analyze spatial patterns of objects across plant leaves. Let's say I have 10 leaves, each with corresponding X,Y coordinates of the objects and a window in the ...
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1answer
1k views

Plotting a heat map onto background in python using kde?

I have a geodataframe with points within the united states. Each point has a geometry attribute as well as a value. I would like to plot a heat map based on these values on top the map of the united ...
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1answer
77 views

Heat map with possibility of shading any country or province in the world?

My boss is collecting data which measures where visitors to our website are located. He wants me to make a choropleth map (I believe that's what it's called) in which countries and provinces are ...
3
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1answer
70 views

How to add a time component in a heatmap?

I have a point file extracted from an AIS network. 1 year is about 900 million points. Each point has a timestamp. I want to make a heatmap for a longer period of time, but I want the heatmap to take ...
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1answer
913 views

Heat Maps in Google Earth Engine

I have a set of points(lat, lon and other attributes) stored as an Asset in Google Earth Engine. I import this asset as a Feature Collection and visualize the points over Satellite Imagery in Google ...
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0answers
150 views

QGIS 3.8 heatmap error

I had assumed it was an error due to lack of space but no matter where we try to save it we get the folllowing error: Traceback (most recent call last): File "C:/PROGRA~1/QGIS3~1.8/apps/qgis/./python/...
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0answers
109 views

Kernel Density Estimate on point data in degrees (scikit-learn)

I am estimating point density, where I am having point coordinates in degrees, I need a raster(over the extent of these points) which provides a density estimation on each cell. I have tried on R but ...
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0answers
37 views

Created heatmaps are not displayed

I created a few heatmaps based on 2 different shapefiles( point layers). Then I joined the data from the 2 shp files, the joined file looks perfectly fine. I created a view heatmaps based on the new ...
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0answers
31 views

Heat Map- how to add colour division and legend [closed]

I would like to ask if anyone knows how to colour the certain counties of England + legend about the colour's meaning. Here is my code which will give me the chosen counties of England on a map. But I ...
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1answer
105 views

Getting AttributeError when exporting Heatmap using qgis2web? [closed]

I want to make a heatmap layer on my webgis. using these options but when i'm trying to export it using qgis2web i always get this error. 2019-06-21T10:15:53 WARNING Traceback (most recent ...
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0answers
27 views

Creating heatmap for spatial overlap of features (or buffers of features) across different layers using ArcGIS Desktop? [duplicate]

I have several layers of features. For example: Layer1 -> set of polygon features Layer2 -> set of point features (with buffer around each feature) Layer3 -> set of polyline features (with ...
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1answer
44 views

Creating\rendering a heatmap not showing up

I am having a problem rendering a heatmap. I am sure the heatmap is created but it doesnt display when I replace or add a renderer. var TF = new FeatureLayer({ url:"https://services3.arcgis.com/...
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1answer
203 views

Reclassifying Raster (Heatmap) from Value to Percent using QGIS?

I have a point layer with several points "belonging" to different years by attribute. For all points of each year I created a heatmap. Now I would like to define the core area of each heatmap. ...
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0answers
189 views

Calculating point density of distinct points using QGIS?

I want to calculate the density of a point layer with QGIS, but these points are dependent on one attribute. (I have different kind of points) I do not only want the normal heatmap; I need the ...
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0answers
41 views

Surface Temperature + Air Temperature in Landsat image comparisons

Quick question about relating Landsat Surface Temperature to locally recorded Air Temperature on a given day: Are differences in local air temperature captured by the Landsat ARD ST imaging process? ...
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1answer
94 views

Creating heat map animation based on point-shapefile with data attribute in ArcGIS [closed]

I want to create an animation of forest fires, using the NASA' MODIS data for the last 11 years. Their shapefile has acquisition data attribute — and it goes day by day all those years. I've already ...
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0answers
102 views

QGIS 3.44 heatmap to contour file

I am trying to convert a point file, currently displayed into a contour file. The methods that I have tried, all expect a raster file as an input, but my source file is a vector file points, i.e. I ...
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1answer
289 views

How to Create Gradient map from GRID file in QGIS-3 Above?

I have a very important Question. I have a GRD file which can be opened in SURFER or QGIS or GIS. The problem is that how can I customize and make my grid file perfect? Here I have two photos which ...
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1answer
460 views

Dynamic CQL filter in leaflet.js

Tell me, please, how I can apply cql_filter, based on currently map location in leaflet.js. I have following code: var myLayer = L.tileLayer.wms("url-to-geoserver", { layers: 'heatmap:layer', ...
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0answers
368 views

OpenLayers. Slow map after render heatmap even when I clear the layer source

I'm working in a map with about 10 layers and it works fine, when I create a heatmap it becomes slower, that's something I was expecting, because the source has about 2000 points. When I want to make ...
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0answers
154 views

Basic Python plotting [closed]

Sorry if I sound like I don't understand, but I've been reading around trying to figure out how to do geospatial plotting in Python. I keep running into errors despite the examples I've seen appearing ...
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1answer
295 views

What do the heatmap layer settings numbers in mapbox stands for?

I have layer settings of mapbox heatmap as follows from this official site: What do these numbers stand for (the first, the second, the third, the fourth number) and what are their limitations please?...
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1answer
205 views

QGIS does not export heatmap SLD-files

At the moment I am creating a webmap with PostGIS and GeoServer. I want to style the data using SLD-files, because my data keeps updating. I have made SLD-files for Points and Polygons and that ...
2
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2answers
213 views

Heatmap-no data vs Zero

I am new to QGIS. I am working on creating heat map of bird diversity(data downloaded from ebird.org). The issue I face is that how to differentiate between: There areas where data is not available (...

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