ImageAmerica Illinois State Geological Survey 20001002 remote-sensing image ISGS GIS Database GISDB.IL_DPW_2000_1FT_MODAIC_RAS Note: The original metadata file was written by ImageAmerica. There are a few additions by ISGS required for archival and access in the Survey's enterprise GIS. 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 on the Illinois Natural Resources Geospatial Data Clearinghouse.] These ortho-images were created as a base for determining flood risk. These data are appropriate for use in local and regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines. 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 None planned -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 IL Illinois Des Plaines ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current. Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. Acknowledgement of ImageAmerica would be appreciated in products derived from these data. ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved.  University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section. Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage. Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data.  Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor. The data do not replace the need for detailed site-specific studies. Original contact: Kallen Bailey, ImageAmerica, 18445 Edison Ave., Chesterfield, MO, 63005, 636-530-1901, kbailey@image-america.com ArcSDE 9.1 on Oracle 10g http://www.isgs.illinois.edu http://www.vpaa.uillinois.edu/policies/web_privacy.cfm http://www.uillinois.edu/trustees/rules.cfm#sec34 http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html 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 The image tiles were mosaicked into ArcSDE using ArcCatalog 9.1 and the Load From Workspace python sample script from ESRI. Initial parameters were: compression: JPEG, 75% build pyramids with bilinear interpolation 200702 15290600 Raster Pixel 336000 112000 1 State Plane Coordinate System 1201 0.999975 -88.333333 36.666667 984250.000000 0.000000 row and column 1.000000 1.000000 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 isgs@isgs.illinois.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following: Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained. The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind. 20090224 Please refer to the Distribution Information section. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section. http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile