See attached MXB.
Open MXB. Run the query (make_points). This will (re-)populate the drawing with points from the image. After the query completes, you can open the image, drop the drawing into it, see it line up with the image, click individual points to see pixel coordinates and height, etc.
DELETE FROM [german_alps_points];
INSERT INTO [german_alps_points] ([geom], [value])
SELECT GeomMakePoint(VectorMakeX2([tx]*128 + [x], [ty]*128 + [y])), [value]
SELECT [x] AS [tx], [y] AS [ty], SPLIT CALL TileToValues([tile])
FROM [german_alps Tiles]
The number 128 is the tile size - you can retrieve it from image properties dynamically in the query instead of hard-coding.
Hope this helps.