How to filter markers by Category

This is part of the Step by Step Guides to get started with some of the more complex topics on this site. The full story on marker quicklinks can be found at Quicklinks and Categories

What you need

GoogleMapping.xlsm from the Download Complete Projects page

Objective

To be able to hide or show markers according to a category on a map created according to How to put markers on maps

Steps

All Mapping activities,  are controlled by 2 parameter sheets. One is general, and tells the procedures how to deal with the data returned from the various mapping providers (geoCodingParameters worksheet) and the other is specific to particular sets of data or desired results (in this case 'step by step parameters')

  • Go to the step by Step MasterTab. This is where you enter the data to be placed on a map . You'll find some example data that looks like this. The columns in Yellow were already completed in How to Geocode addresses using Google Maps, the latitude and longtitude would already have been calculated, and the orange columns were already completed in How to put markers on maps. Now you need to provide data in the green column. Here you will be providing your choice of categories against each record. You can use whatever categories you want here, and however many you want. You can also use multiple categories. 

  • Hit the markers button and the plotted map will have a new drop down box as follows. Selecting a category will hide all the markers not in that category.

  • No more steps. That's all there is to it.

What just happened ?

javaScript code to create these categories was generated as part of the How to put markers on maps process. If you do not want this to be displayed you can amend the web page template according to the instructions at Quicklinks and Categories, or just not include a category column in the data. As with all data items, the name of the column in which to find the categories is tailorable in the parameters sheet.

What Next

Read more about the detail of how all this works and walk through the source code at Mapping and adding markers to maps or see some more Step by Step Guides. In the meantime why not join our forum,follow the blog or follow me on twitter to ensure you get updates when they are available.

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