Compression format on .bil files from server

mag · 12-06-2007, 09:37 AM

I am trying to download and parse .bil files in java from the NWW server, but I am getting confused about the compression formats. I have read on this forum that the .bil files are compressed using the 7-zip format, and I find that true for some files, but not for all. It seems to me that some files are compressed using another decompression algorithm(not sure which...).

I have also been browsing through the code in NWW java version and I am not able to find any code for decompressing 7-zipped files. Are there two different types of datasets on the NWW server, and in that case, how do I locate the .bil files that are not 7-zipped.

All help is appreciated.

m_k · 12-06-2007, 01:54 PM

WWJava uses zipped bils (dataset name: srtm30pluszip).
7-zip (srtm30plus) was for .Net version, which now uses zip too.

12-06-2007, 09:37 AM	#1
mag Junior Member Join Date: Dec 2007 Posts: 5	Compression format on .bil files from server I am trying to download and parse .bil files in java from the NWW server, but I am getting confused about the compression formats. I have read on this forum that the .bil files are compressed using the 7-zip format, and I find that true for some files, but not for all. It seems to me that some files are compressed using another decompression algorithm(not sure which...). I have also been browsing through the code in NWW java version and I am not able to find any code for decompressing 7-zipped files. Are there two different types of datasets on the NWW server, and in that case, how do I locate the .bil files that are not 7-zipped. All help is appreciated.

12-06-2007, 01:54 PM	#2
m_k Bored Explorer Join Date: Nov 2004 Location: Warsaw, Poland Posts: 1,808	WWJava uses zipped bils (dataset name: srtm30pluszip). 7-zip (srtm30plus) was for .Net version, which now uses zip too. __________________ Hot stuff: FAQ, forum search, DirectX, .NET, Video Card Compatibility list

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