I'm new to using CartoDB. I suspect that what I want to do is rather simple but I would love some guidance. I want to produce a map that depicts multiple layers, the first of which is simple zip code polygons (i.e. polygons outlining an area defined by a postal zip code). I would ideally like to stick to using CartoDB to do this. I then plan to add other layers but need to start with zip codes. Any help would be greatly appreciated. Thanks in advance.
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