HI Mike,
The Canaries were not included in the NEXTMap source data so they were constructed using 30m ASTER and 90m STRM, so the output for the Canaries is not up to the same source standards as the NEXTMap data.
That said, the Canaries are not in the SW BGL file, they're in the Canary BGL
Hope this helps
jt.fsg