Read Me File 2/2009

The zip file contains the following files:

*.JP2 - JPEG-2000 compressed image file

*.tab - MapInfo georegistration file type

*.J2W - JPEG-2000 world file which contains georegistration information for use with ESRI ArcView and ArcMap

*.aux - auxillary files used with ESRI ArcGis


00ST_*.tab, 00ST_*.map, 00ST_*.id, 00ST_*.dat - 4 MapInfo seamless table files. Each zip file contains a
	seamless table associated with all the jp2 files for the geographic area.
	The seamless tables MUST be in the same directory as the *.tab and *.jp2 files.
	

00IC*.dbf - Image catalog (ESRI).  Each zip file contains a 00IC*.dbf file associated with of all the jp2
	files for the geographic area included in the zip file.  The image catalog uses a system environment variable, 
	$NYSDOP.  In order to use the image catalog, the user must set the system environment variable on their
	machine before using the ESRI software. 
	The computer system variable is set in the Control Panel > System > Environment Tab
		For Variable: type nysdop
		Value: enter the full path of the directory where the *.j2w and *.jp2 files reside on 
		the machine.

County image index(es) - These files serve as an index for all the image files covering the county. There is a separate 
	index for each  resolution.  Filenames and image dates are provided. The indexes 
	are provided in ArcView shapefile and MapInfo .TAB file formats.  The naming convention is as follows:

		ccc_ss_fff_rrr_indexyy.*, where

			ccc = the 3 letter county name abbreviation
			ss = the coordinate system (SP=State Plane)
			fff = film type (4bd - 4 band)
			rrr = resolution pixel/ground distance ie. 12in is 1ft on ground = one pixel
			yy = the year flown

	
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Note: Starting in 2008, all imagery is 4 - band digital camera imagery. There are two main resolutions, 2ft and 1ft pixel with 1/2 ft. pixel in selected areas.Depending on software and bands displayed, the user can view color using bands 1,2 & 3 or color infrared using bands 4,1 & 2.

    
For more information on using the files visit our Frequently Asked Questions and General Help Page,
http://www.nysgis.state.ny.us/gateway/mg/faq.htm