I have 18 GB of imagery I loaded into a raster catalog. When I convert Raster Catalog to Raster Dataset, the file grows tremendously. It's currently upwards of 200 GB. Why is this?
What version of software are you using? what tool are you using to do the export? What spatial resolution are you writing out, and what are the dimensions of the final raster? Did you specify a NoData value?
v10.4. Data is JP2 format. Raster Catalog to Raster Dataset tool. NAD83 Rhode Island Ft. No NoData value. Not sure what you mean dimensions.
dimensions... probably EW, NS in pixels and/or distance and pixel size, probably more questions relating to destination (gdb type etc), compression, pyramids etc etc
Design methodology for a raster database—Help | ArcGIS for Desktop
Creating raster datasets in a geodatabase—Help | ArcGIS for Desktop
Entire state of Rhode Island. 1, 1 cell size (1 ft resolution). The first time i exported it as Esri GRID. I'm now exporting it as JP2 so its the same as it went into the Raster Catalog. I guess I don't understand how it takes 18 gbs and turns it into 200 gb. Is this all due to compression?
Steven, I normally use esri grids myself, but the information on compression might guide you based on your image type etc. A 10 fold increase is a bit of a surprise unless there is other information also being stored.
Raster compression—Help | ArcGIS for Desktop
Leave the imagery in its original jp2 format and create a mosaic. Don't copy or import it anywhere.
But 20Gb to 200Gb does sound crazy.
Recently, on converting ecw to tiff, I found about 2.5 to 3 times expansion.
I need to turn it into a map package. Will the data be stored in the map package if I just use a mosaic?
Seems to be options to do that, yes.
Might be a bit big though if there is a large amount of rasters.
Retrieving data ...