檔案:1999 Sydney hailstorm radartwocells.png

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致上傳者： 每次使用本圖時，應對每個條目分別建立一份詳細的合理使用依據，其中必須聲明遵守其他非自由內容的相關規定，以及作品來源與著作權資訊。 有關於合理使用依據的範例，請參考這裡。 Template:Non-free use rationale可能有助於說明理由。 此標籤不是合理使用的充分聲明。 致巡查員與管理員：如果本檔案擁有一份合適的合理使用依據，請在本授權模板增加|image has rationale=yes參數語法。

Fair Use Rationale for 1999年雪梨雹暴[編輯]

I believe this image is justifiable in use as "fair use" under United States law because:-

• It demonstrates an historical event where the image is integral to the article (or section therein).
• No free alternative could be created, as this was a radar image and any derivative would still be fair use and not licensed freely.
• The image does not inhibit the creator (the Bureau of Meteorology, operated by the Government of Australia) to make a profit (as a government agency, its purpose is to provide information to the public).
• The use of this image is in line with the intention of the Bureau of Meteorology's operation - to educate, warn, and protect.
• The image is an official radar image, where the contents and operation of the body that created it (Bureau of Meteorology) is integral both to the event and discussion of the event as presented in an encyclopedia article. The radar image and its use to warn citizens is immediately discussed in the article (or section therein), and hence qualifies for fair use because it is integral to this section of text.

Source: http://www.bom.gov.au/weather/nsw/sevwx/14april1999.shtml