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what type of license are subject to the following QGIS libraries?

I would like to use the following libraries released in QGIS package in a "close" (not open source) application. Are there any derived-license isusses ??

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QGIS is under the GPL license

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To elaborate more, if you use these libraries in a project then that project will need to be licensed as GPL and the source code will need to be provided to the users. So if you are creating a closed source project then I would look for libraries that are non-gpl to use. – Jamie Jan 10 '13 at 16:28
This is only the case if you distribute your app – Nathan W Jan 11 '13 at 0:15

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