Need help figuring out how to make a vector overlay for a zoomified image using OL3. Am updating a project from OL2, where what I'm attempting worked fine. Project isn't true map data, the zoomify layer is a scanned document, converted to zoom tiles. Polygons represent the coordinates of terms/phrases in text found in the OCR text. This fiddle shows a page with highlighting for 3 hits on the term "texas". Note the position of the terms is correct on one axis, but simply too high on the screen. I'm sure this is easy, but I'm at a loss as to the problem (if it has to do with extents or projections, or how I'm centering the layer, etc.)
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