Fix Overviews Read Incorrectly when Per Dataset Masks Present bug #3271
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| // TIFF Reader supports only overviews at this point | ||
| // Overview is a reduced-resolution IFD | ||
| val subfileType = ifdTiffTags.nonBasicTags.newSubfileType.flatMap(NewSubfileType.fromCode) | ||
| if(subfileType.contains(ReducedImage)) tiffTagsBuffer += ifdTiffTags |
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The idea is that we're skipping everything that is not a ReducedImage (anyway we can't work with anything else)
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👍 but also noting that this kind of comment is super helpful for a user to see in the method docstring. It would be helpful for the user to know at a glance something like "Only SubfileType.ReducedImage tiffs are supported".
| /** Reduced-resolution version of a transparency mask */ | ||
| case object MaskReducedImage extends NewSubfileType { val code = 5 } | ||
| /** Transparency mask of multi-page image */ | ||
| case object MaskMultiPage extends NewSubfileType { val code = 6 } | ||
| /** Transparency mask of reduced-resolution multi-page image */ | ||
| case object MaskMultiPageReducedImage extends NewSubfileType { val code = 7 } | ||
| /** Depth map */ | ||
| case object Depth extends NewSubfileType { val code = 8 } | ||
| /** Depth map of reduced-resolution image */ | ||
| case object DepthReducedImage extends NewSubfileType { val code = 9 } | ||
| /** Enhanced image data */ | ||
| case object Enhanced extends NewSubfileType { val code = 10 } |
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I decided to cover it with more types, see https://exiftool.org/TagNames/EXIF.html
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raster/src/main/scala/geotrellis/raster/io/geotiff/NewSubfileType.scala
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| // TIFF Reader supports only overviews at this point | ||
| // Overview is a reduced-resolution IFD | ||
| val subfileType = ifdTiffTags.nonBasicTags.newSubfileType.flatMap(NewSubfileType.fromCode) | ||
| if(subfileType.contains(ReducedImage)) tiffTagsBuffer += ifdTiffTags |
There was a problem hiding this comment.
👍 but also noting that this kind of comment is super helpful for a user to see in the method docstring. It would be helpful for the user to know at a glance something like "Only SubfileType.ReducedImage tiffs are supported".
| @@ -18,9 +18,7 @@ package geotrellis.raster.io.geotiff.tags | |||
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| import ProjectionTypesMap._ | |||
| import geotrellis.raster.io.geotiff.reader.MalformedGeoTiffException | |||
| import geotrellis.raster.io.geotiff.util._ | |||
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🎉 big fan of removal of unused imports whenever possible!
Overview
With this PR GeoTiff reader will skip all IFDs that are not a
ReducedImage.Checklist
Closes #3269