EnableExif

[sashadev-sky]

Fixes #169 (<=== Add issue number here)

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changes:

• fullResolutionSrc option is now used to check for EXIF metadata if provided, instead of automatically img.getElement(), because img.getElement() may typically be a compressed version with no metadata on it.
• EnableExif should now be working, but need to test with an image with gps data (neither example.jpg or large.jpg have GPS data. - example.jpg has no EXIF metadata at all and large.jpg has some but not GPS)

pending:

• bump version
• test with image with gps data
• update docs
  • note somewhere that metadata will only work with jpg's and tiff's
  • update fullResolutionSrc option docs
• refactor
• I think remove orientation check because we have our own logic to figure out the rotation angle, and implement that logic instead
• fix usage of overlay._corners to overlay.setCorners()

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[sashadev-sky]

@jywarren @rexagod how do I find an image with gps data to test this?

[sashadev-sky]

@jywarren just wanted to follow up here!! Because I think I fixed the functionality and we've been needing to do that for a while. but don't know where to get an image with location data?

[jywarren]

Aha! Good question. Here's some! https://publiclab.org/notes/patcoyle/03-23-2015/using-the-mapknitter-2-image-placement-using-geotagged-images

You can download them and use them to test this out, and compare to Pat's test map!

[jywarren]

Hi!! Just noting i've consolidated the latest information about this feature in this new issue: #1024