[gdal-dev] the format of satellite photo file

[weixj2003ld]

Hi,
1.I get a satellite photo file,and its extention is .tif£¬and how get the (x,y,z) and the value of each poiont?
2.Could you tell me the article which introduces the format of satellite photo file in detail?
3.Is tif the only format of satellite photo file?
Best regards.
Wei
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