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Luckily you do not need to trust in what you read from the web but you can make a test with your own data. It is not as simple as "PNG tiles are much larger than JPEG, but have better quality". That is mostly true with aerial and satellite images which can be compressed effectively with lossy jpeg method. PNG is lossless and quality is thus perfect but the ...


If you are creating your own cache: Increase the jpeg compression ratio when generating the cache, the default is 75. Or Change the jpeg format to png32. This will result in a larger cache and bigger tiles but it will also improve quality If you are using an ArcGIS online tiled map service Make sure that your application only allows zooming to the ...

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