In this guide we will show you how to import a zipped shape file and create a Heat Map in just a few clicks.
Time to complete: 5 mins.
A heat map (or heatmap) is a graphical representation of data where the individual values contained in a matrix are represented as colors. Wikipedia
Step 1 - Download Files
Nuclear Reactors 2011
(Original file downloaded from Sharegeo Open - NuclearReactors2011 "This data is made available under the Public Domain Dedication and License v1.0 whose full text can be found at opendatacommons.org"
Step 2 - Click on Maps section and create NEW map
Name your new map and save
Step 3 - Import Data and add to Map
When you try to load a map without any layers attached you get the below window
Choose the create / Import button (This is accessible on the map using the gears button on the layer tree view)
Drag and drop to the DnD area the earlier downloaded zip file
After upload, the projection is automatically chosen and a suggested name is added for your new layer based on the filename (choose any name you would like)
Click Save to Import the Layer (this may take a few seconds, the larger the dataset the longer it takes)
After successful import the map will load with the default styling (little red squares)
Step 3 - Create the Heatmap
Click on the little red dot in the Layer tree view to open the styler (Each layer will have a small preview of its style legend on its left - you can hover over it for a full legend view)
The styler will open in the side panel
Click on NEW in the top right panel and give your new style a name
This will create a blank style, click the ADD button in the lower left of the panel and choose 'Heat map'
In the Heat Map Rules Window you can have a few options
- Name of the rule for the legend
- Set the Opacity (transparency) for the heat map
- Choose the attribute of the data on which to style the heat map - For this dataset the best attribute to choose is 'totalpower' - this will highlight the most powerful nuclear stations
Select OK and CONTINUE to load the style
To apply the style to the map Click on SAVE in the lower right corner of the panel
Click YES to overwrite (this replaces the current style on the Layer - a short layer refresh should happen and...
... enjoy your newly created heat map!
If you haven't signed up yet go to the Azimap website and click register.
Enjoy your new maps and thanks for reading the guide.
Author: David McQuillan