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I have entered the following png into the XYZ URL for the Carto custom map but it is not working (for either my link below or their example link). I keep getting my custom map, which I rectified on Map Warper, just floating in blank space:
My rectified map:
The image I see on Carto:
Any ideas why this is happening?
Adding a custom XYZ means you remove any other basemap so if your image does not cover the world, well then you get an image in the middle of a blank space. BUILDER only allows one basemap layer below your CARTO data.
If you want to combine basemaps and your image you need to create a custom CARTO.js application where you add as many Leaflet/Google Maps layers you want below your CARTO data.
