Using custom xyz tiles in CartoDB?

Question

Following this example (see the section "Use the Tiles as a CartoDB Base Map"), I am trying to add a set of xyz tiles to CartoDB, without success.

I exported a EPSG:3857 png from ArcGIS, and created tiles with gdal2tiles:

gdal2tiles.py combine_rc1.png fortiles -z 3-11

I uploaded these to an Amazon s3 bucket, and made them public. Here is one tile as an example: https://s3-us-west-1.amazonaws.com/amazonbasin/fortiles/3/2/3.png

Following the CartoDB example linked above, I then tried to add a custom xyz basemap:

Insert your XYZ URL:
Enter a url: https://s3-us-west-1.amazonaws.com/amazonbasin/fortiles/{z}/{x}/{y}.png

But this doesn't validate, and nothing is added to the map. The page says:

We couldn't validate this, if you're sure it contains data click "add basemap".

The example is for Google cloud storage. Should I expect this to work with Amazon s3? If so, what am I doing wrong?

Answer 1

From the comment by @AndyEschbacher, the validation just checks for a tile at 0/0/0. In my case I don't have a tile at 0/0/0, so validation (lack of validation) wasn't telling me anything.

Furthermore, I needed to check the option to add the tiles with the TMS parameter checked, which inverts Y axis numbering for tiles.