Read Me File 09/2017

The zip file for 2006-2017 Imagery contains the following files:

*.JP2 - JPEG-2000 compressed image file (orthoimagery tile)

*.tab - MapInfo geo-registration file type

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

*.aux - auxiliary files used with ESRI ArcGis
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The zip file for imagery between 2000 & 2005 contains the following files:

*.sid - Mr Sid format compressed image file (orthoimagery tile)

*.tab - MapInfo geor-egistration file type

*.sdw - world file - ascii file that contains real-world transformation information for image,
	use with ESRI products

*.aux - auxiliary files used with ESRI ArcGis

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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 or sid files for the geographic area included.  The seamless tables MUST be in the same directory as the *.tab and *.jp2 or*.sid files.
	
	
00IC*.dbf - Image catalog (ESRI).  Each zip file contains a 00IC*.dbf file associated with of all the jp2 or sid files for the geographic area included in the zip file. 


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 combination of film type and 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_indexyy.*, where

			ccc = the 3 letter county name abbreviation
			ss = the coordinate system (SP=State Plane, U=UTM)
			fff = film type (i.e. - COL, CIR, or PAN)
			yy = the year flown

	
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Note for 2000 - 2007: 
1) Geographic areas may have any of the 3 film types: 'Natural Color', 'Panchromatic' and 'Color Infrared'.
         Hence, the zip files may have more than one Seamless Table and Image Catalog for each film type. 

For example-
         
	 Seamless Tables:  Natural Color  (00ST_*_*_*col.tab) 
			   Panchromatic   (00ST_*_*_*pan.tab)
			   Color Infrared (00ST_*_*_*cir.tab)

	 Image Catalog:	   Natural Color  (00IC_*_*_*col.dbf) 
			   Panchromatic   (00IC_*_*_*pan.dbf)
			   Color Infrared (00IC_*_*_*cir.dbf)
       
Note for 2008- 2017: 
All imagery is 4 - band digital camera imagery. There are two main resolutions, 2ft and 1ft pixel with 1/2ft 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. 

Since 2014, all imagery is 1ft or better.

For more information on using the files visit our Frequently Asked Questions and General Help Page,
https://gis.ny.gov/gateway/mg/faq.htm