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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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18 views

QGIS Heat Map output not correct

Fairly new to QGIS here. I'm having trouble creating a heat map in QGIS3 from a set of points. I've followed what others have done online (e.g.: https://www.youtube.com/watch?v=o9Gqrr5cYrY) but in my ...
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26 views

Creating Leaflet Heatmap using LinsString GeoJSON

I need to create heatmap based on length property from a LineString GeoJSON file. I have tried to use Leaflet.heat plug-in, but this tool accepts points not lines. here is my code: $.getJSON("data/...
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30 views

Toggling off/on heatlayer using geojson file

I created a heatlayer using a geojson file. However, I am having trouble with toggling it on and off with a checkbox. Since the toggleHeatlayer function is within another function, it becomes ...
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1answer
23 views

How to create heat map animation based on point-shapefile with data attribute in ArcGIS?

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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48 views

R : How to build heat-map based on ratios with leaflet package

I'm just starting to try out some things in the GIS arena and perhaps this question is a concept mistake. I've read the post R : How to build heatmap with the leaflet package and the fantastic answer ...
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0answers
44 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
74 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
128 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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46 views

Preparing data to show mostly high values area on heat map using ArcGIS Server?

My client maintain a database of building information, one of them are age of building. They would like to visualized the areas with more old buildings, here is a mock up of such data (we convert the ...
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0answers
84 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
75 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
46 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
91 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 ...
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2answers
56 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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1answer
321 views

Understanding the Heatmap tool values in QGIS

Context I have been having a play around with the Heatmap (Kernel Density Estimation) tool in QGIS 3.4 and I realised that I do not really understand the output. My understanding was that you ...
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0answers
25 views

Normalized HeatMap Across Shapefiles

I will try to explain what I want to achieve. Consider that we have 2 shapefiles: A.shp and B.shp A.shp contains 100 points and in the circle at point (0,0) with radius 5 there are 10 points B.shp ...
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1answer
43 views

Heatmap of events, I can't get the right resolution

With QGIS 3.2.3., I'm trying to create a heatmap of a set of events (ie: bikes passing on a road). This is the original vector. What I'm trying to get is a heatmap with darker colour where a lot of ...
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1answer
308 views

Superposing two plots with Geopandas, with non fill colours in one of them

I would like to plot a map of the edges of the French departments, and the heat maps at the lower scale of the French IRIS. I read both shapefiles using GeoPandas. And now dep.plot(color="white", ...
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1answer
132 views

QGIS heatmap issue

I'm trying to create a heatmap on QGIS 3 from a layer based on a 20,000-entry CSV file with longitude and latitude values, using EPSG:4326 as the CRS. The layer itself looks fine, the markers are ...
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1answer
147 views

Create a heatmap for VISN level data in R

I am trying to create a heatmap for Veterans Integrated Service Networks (VISN) level averages. I have found these datasets containing shapefiles. I have the averages I want to plot based on the VISN,...
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1answer
77 views

Point averaging alternative to GeoServer WPS heat map transformation

I have a point dataset in which each point has a value for a "rating" field. Points distributions don't follow any pattern and can overlap at identical locations. My requirement is to generate ...
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0answers
39 views

Create new heatmap from another raster heatmap

I have an old heatmap raster image and I would like to produce a new heatmap layer. Could this be done, taking as an input the old heatmap image instead of point values? For example, suppose we have ...
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2answers
644 views

Heatmap Processing Exception in QGIS 3.2

I am working through training exercises with the Alaska training data using QGIS 3.2 on Windows 8. To create a Heatmap, I load the airports shapefile. I cannot find the Heatmap plugin using the ...
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2answers
387 views

CSVLayer doesn't show HeatMap in Angular 6

I am using ArcGIS JavaScript 4.8 API and I have integrated the CSVLayer to an Angular 6 application but it is not showing up any heat map. The legend shows that it is getting renderer data and heatmap ...
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1answer
395 views

Displaying animated data over time with the Google Maps API and JS

I'm building an app using Google Maps API and AngularJS. I've managed to display data both as pointers, clusters and heat maps and to reload the maps in real time when the data changes. Now I was ...
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1answer
150 views

Heatmap not working on FeatureLayer (ArcGIS JS API 4.8)

I tried my best but didn't get success to show heatmap on FeatureLayer with latest ArcGIS JavaScript API 4.8. My Code is located here. I used HeatMapRenderer to render the point on the map as the heat ...
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1answer
22 views

Old Geoserver install (“2.1.?”) will not validate Transformation element in Heatmap SLD XML

I'm stuck with an old, weird version of Geoserver in our production environment (circa 2011, installed in an opengeo-suite directory). It seems the WPS extension is installed. On my http://www.our-...
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1answer
484 views

How to implement a temperature map using leaflet/openlayers?

I am new on Leaflet/OpenLayers. I have been searching the internet for a way to create a temperature map like the one below, but I didn't succeed...the only thing I made was a classical heatmap, but ...
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0answers
83 views

Heatmap Tool in QGIS v3.0 not working

I am trying to use the Heatmap tool in QGIS v3.0 but keep getting the following error: I have tried installing the plugin - but it doesn't appear in the list. I can't find the option under Processing ...
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0answers
180 views

Creating heat map with fixed max color value in QGIS?

I am trying to create a heat map using raster data in QGIS 3.0. I have made them previously in ArcGIS pretty easily, but I am having difficulties in QGIS. The difficulty I am having is setting a fixed ...
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0answers
95 views

Render Heatmap using Geotools from DefaultFeatureCollection of Point objects producing black area?

I am trying to render a heatmap using geotools. However, whenever I try to using HeatmapProcess I just get a black box. Here is my code for creating the GridCoverage2D object and rendering it: ...
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0answers
107 views

Creating Heatmap in QGIS?

I'm having a problem with heat map in QGIS. I have two shapefiles with accidents (with and without victims). Every time I try to create a heatmap with them, it gets pixilated as you can see in the ...
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2answers
365 views

Error Heatmap plugin QGIS 3.2.0

My questions is about heatmap plugin in QGIS 3.2.0 I have my data in CRTM05 projection, it´s a metric projection to Costa Rica based in WGS84 Datum. When I try to run the Heatmap plugin, the running ...
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0answers
157 views

Visualising road segments as heatmap

I have some data on frequency of different road segments, and need to visualise it as a heatmap. Is there some utility/plugin for Mapbox or Leaflet which does this kind of visualisation. I am only ...
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2answers
449 views

Create line heatmap with QGIS

I have loaded my bike tours as .gpx files into QGIS. It already looks quite nice but I was wondering if it might be possible to create something similar to the strava heatmap with tools of QGIS. I ...
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0answers
162 views

QGIS 3 heatmap, on screen color ramp with data scale

When making heatmaps in qgis 3.0.1 i would like to place the color ramp with percentage and actual numbers for the bin borders on the map. Each marker under the color ramp represent a percentage of ...
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0answers
128 views

QGIS 3 heatmap, how to access the summarised data

When doing heatmaps from large point data sets (millions of points) the process is rather slow and with frequent recalculations even on my i7 7700 with 64 gb ram and fast ssd. As an alternative on ...
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0answers
191 views

Creating heat map from polygon layer in QGIS

I have census data formatted as 5000+ small polygons of areas with average values attached to them. When I map this directly, it is hard to read, because some of the areas are very small. So I want to ...
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1answer
149 views

MapServer Kerneldensity empty map

I'm trying generate a heatmap from my PostGIS table, but my map is empty... Here is my config file: LAYER NAME feature_heatmap TYPE raster CONNECTIONTYPE kerneldensity CONNECTION "point_data"...
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1answer
506 views

Could not create destination layer

I am using QGIS 3.0.3 to make a heatmap using processing toolbox, kernel density estimation. The input I am using: I have generated centroids from polygons using Vector --> geometry --> centroids ...
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0answers
145 views

Limiting OpenLayers heatmap to vector feature boundaries

I'm looking to create a heatmap using OpenLayers, which is possible using the ol.layer.Heatmap class. However, I want to limit the visualisation of the heatmap effect to span just the underlying ...
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0answers
63 views

Assessing density of land use changes in QGIS?

I have 3 shapefiles, each one represented by polygons that show the changes in land use that took place over two years (for example 1955/1988 - 1988/2013 - 2013/2017). Each of these polygons is formed ...
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0answers
50 views

To create Categorical Heatmaps in Qgis do I need 1 heatmap or 1 per layer for each category

In Qgis 2.18 I have a points layer and can create a raster heatmap for all the points with singleband pseudocolour. If I wanted to show separate categories as different colour ramps do I need to ...
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1answer
140 views

How to filter a heatmap layer with QGIS Atlas?

I have a dataset with student route node collections from 20 different schools that I want to drive heatmap atlas pages with. Can the heatmap layer in QGIS have a filter applied, either based on the ...
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0answers
26 views

Weather Heat Map/ Hot Spot [duplicate]

I have a shapefile of tornado warning polygons. I would like to find and map the areas that have been in the most amount of warnings in that period of time. For example, I would be able to see that x ...
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1answer
1k views

Zoom level wise radius change in Leaflet Heat

I am using leaflet.heat for creating heatmap with leaflet API.I have a highest intensity of 1.0 and lowest 0.0. I have created a getRadius function where I tried to change radius based on zoom scale. ...
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1answer
577 views

What does “layer units” mean?

I created a Shapefile from Google Earth (kmz) consisting of a set of points which I had used as a layer for Heatmap analysis. I opened the kmz file in QGIS and utilized the heatmap plug-in and it has ...
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1answer
472 views

Adding contour line to heatmap in QGIS?

I use QGIS 2.18.14 I import csv file with hits on a certain area. I then create a simple indicative heatmap (properties > heatmap). Can I add contour lines to this heatmap and if yes, how? I also ...
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0answers
246 views

Creating “heatmap” based on data with legend in QGIS?

I am new to QGIS. I need to make a map that looks like a heatmap, but is based on data values, not point concentrations, and with a legend. I was able to make a heatmap based on data values, but not ...
2
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1answer
1k views

Creating a heatmap from vector grid and point layer with QGIS

I would like to make a heatmap based on the number of hits within a certain area. I begin by importing the data of my hits: Layers > add layer > add delimited text layer = ok I add google satellite ...