Spatial Data Visualization

I gave a talk at Google I/​O in June this year with fel­low Goo­gler Brendan Kenny, on the top­ic of Spa­tial Data Visu­al­iz­a­tion using the Google Maps API:

If you’re inter­ested in play­ing with the demos your­self, fol­low along with the slides, and per­haps even take a look at the source code!


  1. Gijs Nijholt’s avatar

    Hi! I really enjoyed watch­ing the video, and I was won­der­ing if you could point me to the source code if it’s avail­able.. Espe­cially the WebGL/​GLSL parts are of interest to me. Thanks!

    1. marlu’s avatar

      Hi Enoch, Great video about the data visu­al­iz­a­tion. I have a ques­tion about the heat map imple­ment­a­tion. You men­tion at 07:35s that you use the ocean poly­gon data to cre­ate sharp edges on the heat map over­lay.
      I have the heat­map over­lay and the poly­gon data I would like to use for the bor­der, but it’s not clear to me how I could imple­ment this.
      Is the bor­der poly­gon data actu­ally added as a new over­lay lay­er on top of the heat­map? or a set­ting in the heat­map object?
      Could you point me in the right dir­ec­tion? Would really appre­ci­ate it.

      1. marlu’s avatar

        Sorry, was a bit to fast with my post. I’ve looked into the source code of the demo and found how it’s cre­ated: It’s actu­ally drawn right on top of the heat­map over­lay. How­ever this is an imple­ment­a­tion I won’t be able to use: I basic­ally would like to ‘mask’ the heat­map over­lay in a way that a sharp bor­der will be added, but the actu­al googlemap will still be vis­ible around it. Do you know if this is pos­sible?

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