Geographic Imager has the ability to export the entire working artboard or document as a GeoPackage that includes georeferencing. Geographic Imager currently only supports exporting as tiled matrix sets to a GeoPackage file (.gpkg). One of the primary uses of GeoPackage is on mobile devices.
Using Export To GeoPackage
To export the document to GeoPackage, click File > Save As, then choose GeoPackage (*.GPKG) from the Save as type drop-down. After choosing a save location and a parent GeoPackage name, the Geographic Imager - GeoPackage Options dialog box appears. Use it to specify a Dataset name. The dataset name does not equal the GeoPackage name. Instead the dataset is actually a sub-set contained within the GeoPackage itself.
Zoom Level tab
The Zoom level tab has options that determine the number of zoom levels that can be used. The Top level pixel size will vary depending on the number of zoom levels. The number of available zoom levels range from 1 to 6. An Auto setting automatically chooses an appropriate number of tiles. When the Build full pyramid option is enabled, it will always choose the maximum number of zoom levels available.
Options tab
Click the Options tab to view available settings.
Tiles can be created in PNG or JPEG image format. Depending on the image format chosen, each format has several specific options available. The Compression option is only available for the PNG format, with a compression range of 1 to 9 (1 being lowest, and 9 being highest). The Quality option is only available for the JPEG format, with a quality range of 1 to 100 (1 being lowest and 100 being highest). Depending on the compression or quality value, output tile file sizes will vary. Choose an Image resampling method to resample the GeoPackage tiles. The resampling method assigns color values to any new pixels based on the color values of existing pixels. By default, the Adobe Photoshop resampling method will be used. You can change the default resampling method in Adobe Photoshop preferences.
The following are available image resampling methods:
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Bicubic (smooth gradients) |
Takes a weighted average value of the sixteen pixels closest to the transformed location in the source image. |
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Bilinear |
Takes a weighted average value of the four pixels closest to the transformed location in the source image. This method results in a smoother image than the nearest neighbor method but at the expense of more processing time. |
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Nearest Neighbor (hard edge) |
Takes the value of the pixel that is closest to the transformed location in the source image. This is the fastest method in terms of processing time and is the method to use to preserve a colour panel during image transformation. It is also the best method to preserve original colours in some non-RGB colour modes, such as CMYK, by avoiding the internal conversion to/from RGB. |
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Automatic |
Adobe Photoshop chooses the resampling method based on the document type and whether the document is scaling up or down. |
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Preserve Details (enlargement) |
A method for enlarging images that attempts to smooth out noise. |
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Bicubic Smoother (enlargement) |
A method for enlarging images based on Bicubic interpolation but designed to produce smoother results. |
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Bicubic Sharper (reduction) |
A method for reducing the size of an image based on Bicubic interpolation with enhanced sharpening. This method maintains the detail in a resampled image. If Bicubic Sharper oversharpens some areas of an image, try using Bicubic. |
The Image resampling options may differ depending on your Adobe Photoshop version.
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