The Next-Generation Clustered Heat Map (NG-CHM) Viewer is a web application consisting of HTML, JavaScript, and CSS that can be used in most common web browsers including Firefox, Safari and Chrome. You do not need any special plugins or other browser software installed, but you will need to have Javascript enabled. NG-CHMs can be opened online from a website or from your local file system using a local copy of the Viewer.
Multiple websites have made hundreds of existing heatmaps available online. To see a list of such NG-CHM collections visit our web page on Existing NG-CHMs.
You do not need a local copy of the viewer to access those NG-CHMS online as the respective websites will include an online version of the viewer compatible with their map versions.
If you save a copy of an NG-CHM locally or build one yourself, you’ll probably want a local copy of the NG-CHM Viewer to allow you to view those NG-CHMs.
The latest release version of the NG-CHM Viewer web application can be accessed on the NG-CHM website. This will open the viewer in your current browser and allow you to open an existing NG-CHM file from your file system. This file can also be downloaded and opened directly from your file system.
https://www.ngchm.net/Downloads/ngChmApp.html