Using CC 2017. When adding a map with a static latitude/longitude it will show. As soon as I use dynamic it shows nothing but ocean. www.makkumart.nl/kaart.php

Hello Jacques,
I only see one record in your map ... but you have selected a wrong repeating element:
{{maps.data.query1[0].id}}
This should be your query, not some binding in it.

changed it to {{maps.data.query1}}. Also changed latitude and longitude. It will show markers now, but zooms in to Africa instead of the Netherlands. I added lat/long for center point and now it is ok

I will check the centering issue. You can try setting some static center location for now.