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Original file (1,513 × 983 pixels, file size: 56 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Image:Usa-state-boundaries-lower48+2.png – USA state outlines, Hawaii and Alaska displaced, 2005x1289px, black on transparent. Image:usa-state-boundaries-1000.png – USA state outlines, true positions, 1000 px wide, black on white
Original file (1,148 × 903 pixels, file size: 89 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
This file was derived from: Coat of arms of the United Kingdom (black and white) highres.png: Author: File:Coat of arms of the United Kingdom (black and white) highres.png: Reynolds Stone; derivative work: TilmannR; Permission (Reusing this file) The original PNG version, from which this file derives from, is out of copyright since 1 January 2006.
This image shows the results of overlaying each of the above transparent PNG images on a background color of #6080A0. Note the gray fringes on the letters of the middle image. This shows how the above images would look when, for example, editing them. The grey and white check pattern would be converted into transparency.
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
TIFF also offers special-purpose lossless compression algorithms like CCITT Group IV, which can compress bilevel images (e.g., faxes or black-and-white text) better than PNG's compression algorithm. PNG supports non-premultiplied alpha only [33] whereas TIFF also supports "associated" (premultiplied) alpha.
Sometimes, you find a drawing or similar image useful for a Wikipedia article, that was saved as a JPEG but should have been saved as a PNG.JPEG is good for images where the color changes fluidly throughout the image, like in a photograph, whereas PNG files are good for images with relatively few colors, such as a drawing of a flag, a chart, or a map; note that sometimes SVG is better.