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.

59 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3
votes
0answers
138 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 ...
3
votes
0answers
190 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 ...
3
votes
0answers
289 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 ...
3
votes
0answers
639 views

Heatmap Kernel Density QGIS

I am trying to understand the output of the heatmap tool of QGIS (kernel density). For this reason I created a kernel density map for a single point that has a projected coordinate system (epsg: 21781)...
3
votes
0answers
611 views

heatmaps with local maxima, weight, api functionalities

I am looking for a heatmap vizualization on a map, which shows: local maxima: that means that you always see some "red spots" regardless the zoom. See the picture below. enables to set a weight to ...
3
votes
0answers
2k views

Folium heatmap not displaying

I have an output file data.json [{"5403": 2, "9734": 1, "2565": 5, "5087": 2, "9061": 1, "1761": 4, "4811": 7 "1111": 5, "3891": 3, "1962": 3}] and a shapefile converted to geojson https://www....
3
votes
0answers
873 views

How to plot heatmap/locations in Geoserver & Openlayers map from the Lat/Lon data of PostGIS table?

I am using Geoserver, Openlayers, PostGIS for Geospatial web implemenation. I have an Indian map shape files for States, Districts, Talukas. I am able to generate a map with states, districts, ...
2
votes
0answers
34 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? ...
2
votes
0answers
65 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 ...
2
votes
0answers
229 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 ...
2
votes
2answers
935 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 ...
2
votes
0answers
170 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 ...
2
votes
0answers
394 views

Creating Heatmap Based on Distance From Points

currently with postGIS I have created a table of point geometries at different coordinates representing cell phone towers. I would like to create a heatmap which would show the strength of the cell ...
2
votes
0answers
242 views

CARTO weighted heatmap with variable range per point

I'm trying to do a Heatmap with carto but seems that torque considers each point equal in covered range but my data consists in values from antennas that cover different ranges (and i need that ...
2
votes
0answers
93 views

Mapping/visualising data with Long Tail?

I work with a dataset that gathers stats from all across a city. Each datapoint is of interest and worth visualising to our users, but there are a few parts of the city that significantly deviate from ...
2
votes
0answers
184 views

Heatmap plugin crashing/ No longer available for QGIS 2.16?

I am a Windows user, quite new to QGIS, and I just updated my QGIS to 2.16 (from 2.12 Lyon). I was previously able to create a heatmap overtop a basemap, but my heatmap plugin now crashes the program ...
2
votes
0answers
251 views

Heatmap on globe - distortion problems

I want to display a heatmap (png) on a globe in an android app. The heatmap is generated programmatically. The heatmap consists of colored circles. I upload the png to geosserver and display it as ...
2
votes
0answers
574 views

Overlapping Polygons

I have a project that requires us to plot floods in a certain area, the example below shows the flood areas. What I would like to know is how would I be able to shows these polygons in a better ...
2
votes
0answers
256 views

Is there an analog to ArcGIS' “Neighborhood Toolset > Point Statistics” for QGIS?

Is it possible to create a raster with QGIS in which the raster cell value is assigned by summing the number of vector points that are within a certain radial distance of the cell? After much web ...
2
votes
0answers
463 views

Can Nearest Neighbor Analysis help determine values for a Heat Map?

Given the below parameters (from Nearest Neighbor Analysis): A) Is there a definite range my Radius value should be within? B) Are there definite values my cell size should be near? C) Is there a ...
1
vote
1answer
93 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. ...
1
vote
1answer
39 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 ...
1
vote
1answer
118 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 ...
1
vote
0answers
203 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 ...
1
vote
0answers
32 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 ...
1
vote
0answers
206 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 ...
1
vote
0answers
65 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 ...
1
vote
0answers
272 views

How can i make drainage density map by using drainage map

I made drainage map, but I don't know how can make drainage density map, I just heard that I have to convert the lines into points and then use HeatMap, but I did and my results do not make sense. Who ...
1
vote
0answers
161 views

Solutions for generating grade/slope estimate heatmaps from a topography contour layer

Given a shapefile layer of 5-ft interval topography contour lines overlaid on google earth, I could, using the Ruler tool and some simple arithmetic, calculate average percentage grade numbers for a ...
1
vote
0answers
210 views

HEATMAP-Nan Layer, Kernel, Rows and Column

My Friends, My problem is with the Heatmap Plugin. I have a 20.000 points in the map and when i want to heatmaping, the layer is NaN. the village has 88 Km2 and is in the OpenStreetMap (wgs84 epsg:...
1
vote
0answers
147 views

How do I create an inverse-distance weighted attribute mean map?

An attribute-weighted heatmap applies inverse distance weighting to each point in a set proximity and adds them all up. I am searching for a tool in QGIS or another software that allows me to do the ...
1
vote
0answers
2k views

Add a heatmap as a layer to a map based on OpenStreetMap from C# WPF Visual Studio 2013

I need to show a map with some points (with lat/lon) of a heatmap on a map based on OpenStreetMap (OSM) . I have created a heatmap as a bitmap image by GHEAT.NET control lib http://www.codeproject....
1
vote
0answers
29 views

Is there a lower bound on the std deviation for v.kernel in GRASS?

I'm using the v.kernel function in GRASS to create heat maps. I am able to generate an acceptable heat map using a std deviation of .2 and a several thousand rows and columns. After the map is ...
1
vote
0answers
60 views

QGIS Heatmap Plug: Filling a radius with one color

I'm using the heat map plug in and I want to fill in my circles with just one color that corresponds with a specific color along a gradient. My tinkering has not been fruitful and every tutorial I've ...
1
vote
0answers
307 views

How do I fix my SLD tile heat map when it comes up as dots?

I am currently working on an SLD heat map on GeoServer that uses tiles.There is a point in each tile with the data. From far away, the heat map looks normal. But up close it just becomes little dots ...
1
vote
0answers
164 views

Torque heatmap on CartoDB with time control

I am interested in create a Torque Heatmap in which you can see the events occured every year in one step, for twelve years in total. Every event has a aggregation or ponderation value (they are the ...
1
vote
0answers
148 views

Gradient fill based on scores (similar to elevation)

I'm rather new to using GIS (QGIS, specifically). I've mapped out a cohort of around 550 patients across Long Island, New York based on their full address by using MMQGIS plugin. This data is ...
1
vote
0answers
724 views

Openlayers heat map not displaying properly in html

I was wondering if you could help me with something I am trying?? Created a heatmap from a sql point table using sld in GeoServer. Displays fine as a preview:- It looks tiled when I publish it to ...
1
vote
0answers
289 views

Making Map with Color Ramp Using SQL Database Intergration?

This could be a trivial question, but I've been kind of stuck on it for awhile. I'm trying to construct multiple maps that reflect aggregated data showing overall risk by county in a SQL Database (...
1
vote
0answers
108 views

Show large information in a map (millions of points)

I have millions of points (census data) about 1.5Gb in a text file. But I only want to show an area based on this points like a heat map, so maybe I have to build polygons based on these points. What ...
1
vote
0answers
288 views

Conservation International Hotspot Data

I am creating a Heat Map and need Conservation Internationals's Biodiversity Hotspot Data in GIS form. I have tried to find the data online, but have since been unable. Where would I be able to find ...
1
vote
0answers
70 views

What are problems & biases stemming from mathematics behind using Monte Carlo Markov Chain to make heatmap?

My buddy and I are using Monte Carlo Markov Chains to make a heat map - in the interest of rigour, and out of curiosity: "What are the problems & biases that stem from the mathematics behind ...
1
vote
0answers
126 views

Can I use the PyQgis QgisPluginLayer to create heatmaps?

I am working in an application to generate maps from a bunch of MIF/MID files, I already created almost all the maps that I need, but, now I want to create heatmaps. I can't find any way of creating ...
1
vote
0answers
174 views

Heatmap plugin with relatively small area

I'm trying to make a heatmap using points in a relatively small area (about 50km by 50km) and I just get a single red block every time (even after switching the color map to 'pseudocolor'). I've read ...
1
vote
0answers
340 views

Looking for .NET Heat Map API / SDK

I have a requirement to add a 'heat map' style layer to a Javascript/jQuery based application that I am working on. So far, I have used heatmap.js with no problems at all. My only concern with this ...
1
vote
1answer
151 views

ESRI JavaScript HeatmapRenderer class and Print widget

I’m working on an application using ESRI’s HeatMapRenderer class from the JavaScript API. The issue that I am running into is that the Print widget fails if the heat map renderer layer is on the map. ...
0
votes
0answers
44 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 ...
0
votes
0answers
29 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 ...
0
votes
0answers
124 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/...
0
votes
0answers
50 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 ...