ESRI User Conference 2004

1
ESRI User Conference 2004

• Rasters

2
Raster Loading

• Loading options
• Mosaic images into a raster dataset
• cannot have overlap it is eliminated
• All must be of same properties and interpolation
  method.
• Multiple raster datasets
• One for each tile
• Raster catalogs
• overlap is kept
• this is a collection of raster datasets
• The SDE raster command line creates an 8.3 raster
  not a 9, therefore it has no geometry column. It
  must be registered

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Raster Loading (contd)

• Steps to loading a large amount of raster data
• Configure your system
• Create the DBMS storage space
• Prepare the source data
• Create a raster object
• Load image data into the raster
• Build statistics (DBMS)
• Build statistics (Raster)
• View (repeat above steps until it is right)
• Transferring the data (if needed)
• Do this thru detached files or SDEexport.

4
Tips

• Use Direct Connect if client is faster than
  server
• Use Fillfactor of 95 to 100 if read only
• Increase size of rasterbuffsize during load
  process (to 10 MB)
• sdeconfig o alter v rasterbufsize 1024000
• Calculate stats
• Pyramid reference point
• important, because pyramids will be recreated if
  you are outside this
• Load the upper left image first it uses the min
  x, max y
• Applying pyramids will increase storage space by
  about 33
• Pyramids are not used for analysis, but are used
  for printing

5
Some New Stuff

• Personal Geodatabases
• Can have raster datasets now (sort of)
• Only outlines are stored in the PGDB
• Images are copied to an .img format file
• Can have raster catalogs now
• Managed
• Image is stored locally as .img
• If you delete the outline the image is deleted
• Unmanaged
• Image is not stored locally
• Image is not deleted if you delete the outline

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More New Stuff

• Raster Column
• Feature classes can have one raster column
  defined now
• The column definition will say Raster
• The image must be loaded in an ArcMap session
• Looks like it is only a link to the image
• Attribute Column
• Raster catalogs can now have attribute columns