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I want to prepare the heat maps so what parameters are required for that??

I have large point data (I want to represent the density on the map)

I gone through the following posts :

I am using ArcGIS Desktop 10.1 and ArcGIS Server 10.1 + ArcGIS Java Script API 3.0

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Sunil
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    Slightly unrelated: http://xkcd.com/1138/ :) – Martin Nov 23 '12 at 13:37
  • Which part are you having trouble with? – NWT Adam Nov 23 '12 at 15:42
  • @ NWT Adam I have large point data which contains attribute information so how do I create the heat map?? I understand that it represents density on the map.(point shape file published on ArcGIS Server & created the REST url)so how do represent it on heat map..? thanks – Sunil Nov 24 '12 at 07:35
  • Do I need to calculate any formula for that ? – Sunil Nov 24 '12 at 07:37
  • Those links no longer work though. Any idea where they should go now? Thanx! Zeddock – zeddock Feb 28 '13 at 00:10
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    This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post. – Fezter Feb 28 '13 at 00:28
  • @zeddock Please give us detail. Which link does not working? – Sunil Feb 28 '13 at 05:33

3 Answers3

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Coincidentally, I have been doing a lot of reading about this subject over the last couple of days. For the actual generation of heat maps there are a large number of factors to consider.

The most valuable resources for me were from Laura Rosenshein at Esri. She sums up a lot of the material in this one blog post.

To answer your question, I would recommend watching the videos linked on that page and then running through the tutorial - that gave me sufficient knowledge on how to use the Spatial Statistics tools in ArcMap to create a multi scale-level heat map for my web application.

If you are short on time, this post gives a good summary on considerations to think about when creating a heat map.

jakc
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    links didn't work. I think this is the new link to the first one: http://blogs.esri.com/esri/arcgis/2011/03/31/taking-analysis-to-the-next-level-part-1/ – Dowlers May 14 '13 at 19:17
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It might also be worth checking out this library which is hosted on the new ESRI github. The library allows you to make a heat map on the client side using HTML5.

A demo of the application: http://esri.github.io/heatmap-layer-js/

The github site: https://github.com/Esri/heatmap-layer-js

Stephen Lead
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David Wilton
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0

Updating this in 2021: the latest ArcGIS API for JavaScript v4 has a heatmap renderer. Sample is here: Visualize points with a heatmap.

Example:

const renderer = {
  type: "heatmap",
  colorStops: [
    { color: "rgba(63, 40, 102, 0)", ratio: 0 },
    { color: "#472b77", ratio: 0.083 },
    { color: "#4e2d87", ratio: 0.166 },
    { color: "#563098", ratio: 0.249 },
    { color: "#5d32a8", ratio: 0.332 },
    { color: "#6735be", ratio: 0.415 },
    { color: "#7139d4", ratio: 0.498 },
    { color: "#7b3ce9", ratio: 0.581 },
    { color: "#853fff", ratio: 0.664 },
    { color: "#a46fbf", ratio: 0.747 },
    { color: "#c29f80", ratio: 0.83 },
    { color: "#e0cf40", ratio: 0.913 },
    { color: "#ffff00", ratio: 1 }
  ],
  maxPixelIntensity: 25,
  minPixelIntensity: 0
};

const layer = new CSVLayer({
  url: "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_week.csv",
  title: "Magnitude 2.5+ earthquakes from the last week",
  renderer: renderer
});
John
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