ImageAmerica 20001002 Remote-sensing image ISGS GIS Database /<filename> Note: The original metadata file was written by ImageAmerica. The only entries by ISGS are those required for archival and access in the Survey's formal GIS, and Spatial_Data_Organization_Information, and Spatial_Reference_Information. The Des Plaines images are one-foot resolution digital images which have been ortho-rectified to accuracy criteria required for use of the images at 1'=200' (1:2,400 scale). These black and white images cover approximately 450 square miles of the Des Plaines Watershed in southeastern Wisconsin and northeastern Illinois and were acquired during leaf-off vegetative conditions. The complete set of images and project index are distributed on 28 CDs. [ISGS note: and internally at ISGS and on the Illinois Natural Resources Geospatial Data Clearinghouse.] These ortho-images were created as a base for determining flood risk. Each set of CD's consists of image files (27 CDs) and an ArcView project index (1 CD). Most image CDs contain 10 image files. Each file is formatted in standard geotiff format. Tile boundaries and internal image pixels are oriented to the IL State Plane, East coordinate system. [ISGS note: NAD83] The extent of most image tiles is 8000 x 8000 US Survey feet. Image file names correspond to the State Plane coordinates of the southwest corner of the tile. These datasets have been validated for completeness and accuracy by the USGS. A test of the ortho-image positions against 29 ground check points produced RMSEs within the x and y tolerances of 3.1-feet (maximum RMSE for use at 1:2400 scale û 1"=200'). Final RMSE x = 2.67 feet. Final RMSE y = 2.08 feet. 20000325 20000326 ground condition complete unknown -088.17 -087.75 42.75 41.80 none digital orthophoto ortho-imagery ortho image ortho-images TerraSource Terra Source digital image digital imagery digital photography digital photographs None None. Acknowledgement of ImageAmerica would be appreciated in products derived from these data. Kallen Bailey ImageAmerica mailing and physical address

18445 Edison Ave.

Chesterfield MO 63005 USA 636-530-1901 unknown kbailey@image-america.com N/A N/A Panoramic digital images were acquired from 17,500 feet above mean terrain using the Direct Digital Panoramic (DDP-1) camera. Onboard GPS and inertial navigation system data were used to derive camera position and attitude during data processing. Preprocessing, bore-site adjustment, and ortho-rectification were performed on the full project using automated processing in SocketSet photogrammetric software and proprietary software. Radiometric adjustments were applied to reduce brightness variations between images and to enhance image contrast. 20001002 raster Pixel varies varies State Plane Coordinate System 1983 3776 .999975 -88.3333333334 36.6666666667 984249.998999999 0.0 row and column 1 1 feet North American Datum 1983 Geodetic Reference System 80 6378137 298.257 Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR. 20010328 ImageAmerica mailing and physical address

18445 Edison Ave.

Chesterfield MO 63005 636-530-1901 Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998