I have ortophotos of an area that I need to serve as a background map for my vectors. I got it as 2500 files (71,5MB each) in raw TIFF format with corresponding TFW word file - 180GB of data. Coordinate system is local and it matches with my vectors (there is no EPSG code for it but I named it as “32805” and put a proper definition).
For desktop use in MapInfo I converted them to ECW (with some tool that comes with MapInfo) and retile as much bigger to have only 71 file because opening 2500 tiff files is overkill. I just merged 49 TIFF’s (7x7) into one ECW - 35000x35000pixels – largest is around 200MB) It works great and its really fast in MapInfo.
Now I am quite confused - HOW to serve them in GeoServer ?
I have publish one TIFF and one ECW for comparison. ECW is much faster in browser preview (I am aware of ECW server licensing issue but that shouldn’t be a problem). I have found a presentation “GeoServer on steroids” and read about ImageMosaic, ImagePyramid, retiling, adding overview etc it was quite informative but still don’t know what to do.
My question is : how should I do it ? Mosaic or Pyramid, and if is one of the answers positive, I need your advice or some hints. I would really like to be ECW because of disk space so there will be no need to keep 180GB of tiff’s on a server.
Data will be served through LAN with maximum 20 users connected at peak hour.SQL server have not so huge amount of data. Sorry if I miss some other info, but I will send it if needed.
Geoserver 2.1.4, Windows 7 32bit, 2GB System Memory, (1.7.0_09 (Java HotSpot(TM) Server VM), Native JAI+Native JAI ImageIO = true
Original TIFF gdalinfo D:\75720-47970.tif Driver: GTiff/GeoTIFF Files: D:\75720-47970.tif D:\75720-47970.tfw Size is 5000, 5000 Coordinate System is `' Origin = (7572000.000000000000000,4797500.000000000000000) Pixel Size = (0.100000000000000,-0.100000000000000) Metadata: TIFFTAG_SOFTWARE=Adobe Photoshop 7.0 TIFFTAG_DATETIME=2006:10:09 13:02:57 TIFFTAG_XRESOLUTION=72 TIFFTAG_YRESOLUTION=72 TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) Image Structure Metadata: INTERLEAVE=PIXEL Corner Coordinates: Upper Left ( 7572000.000, 4797500.000) Lower Left ( 7572000.000, 4797000.000) Upper Right ( 7572500.000, 4797500.000) Lower Right ( 7572500.000, 4797000.000) Center ( 7572250.000, 4797250.000) Band 1 Block=5000x1 Type=Byte, ColorInterp=Red Band 2 Block=5000x1 Type=Byte, ColorInterp=Green Band 3 Block=5000x1 Type=Byte, ColorInterp=Blue ------------- ECW file which is retiled from 7x7 original tiffs gdalinfo D:\OF-45.ecw Driver: ECW/ERDAS Compressed Wavelets (SDK 3.x) Files: D:\OF-45.ecw Size is 35000, 35000 Coordinate System is: LOCAL_CS["LOCAL - (unsupported)", UNIT["Meter",1]] Origin = (7571500.000000000000000,4798500.000000000000000) Pixel Size = (0.100000000000000,-0.100000000000000) Corner Coordinates: Upper Left ( 7571500.000, 4798500.000) Lower Left ( 7571500.000, 4795000.000) Upper Right ( 7575000.000, 4798500.000) Lower Right ( 7575000.000, 4795000.000) Center ( 7573250.000, 4796750.000) Band 1 Block=35000x1 Type=Byte, ColorInterp=Red Overviews: 17500x17500, 8750x8750, 4375x4375, 2187x2187, 1093x1093, 546x546, 273x273, 136x136 Band 2 Block=35000x1 Type=Byte, ColorInterp=Green Overviews: 17500x17500, 8750x8750, 4375x4375, 2187x2187, 1093x1093, 546x546, 273x273, 136x136 Band 3 Block=35000x1 Type=Byte, ColorInterp=Blue Overviews: 17500x17500, 8750x8750, 4375x4375, 2187x2187, 1093x1093, 546x546, 273x273, 136x136