Identification_Information: Citation: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: Unpublished Material Title: Illinois Historical Aerial Photographs: County Index Data v.4 Edition: Version 4 (2008) Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://www.isgs.illinois.edu/ Online_Linkage: http://illinois.edu Description: Abstract: Aerial photograph center point Index Data are offered by county in ESRI Shapefile format. The center points direct the user to non-geometrically corrected Illinois historical black and white aerial photography acquired during the late 1930s and early 1940s. The center points were created on an county by county basis. These Index Data contain information for each aerial photograph, including digital file name, flight line, county name, historical county code, roll and exposure numbers, agency which contributed the original photographic paper print for scanning, acquisition date, time flown (if available), the CD-ROM on which the original file is stored at the ISGS, and any additional notes. Purpose: This data set was created to assist the user in locating historical aerial photographs which have no spatial reference. Supplemental_Information: The center point locations are only approximate. More information about the center points can be found in the "Data_Quality_Information" section of this metadata. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1936 Ending_Date: 1941 Currentness_Reference: publication date Status: Progress: In work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.675280 East_Bounding_Coordinate: -87.483350 North_Bounding_Coordinate: 42.564692 South_Bounding_Coordinate: 36.911398 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: aerial Theme_Keyword: photography Theme_Keyword: historical Theme_Keyword: black and white Theme_Keyword: shapefile Theme_Keyword: navigation Place: Place_Keyword_Thesaurus: none Place_Keyword: Illinois Place_Keyword: county Place_Keyword: Midwest Place_Keyword: Metro Area Place_Keyword: Great Lakes Place_Keyword: Carbondale Place_Keyword: Champaign Place_Keyword: Chicago Place_Keyword: Peoria Place_Keyword: Rockford Place_Keyword: St. Louis Place_Keyword: Springfield Place_Keyword: Shawnee National Forest Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: pre-WWII Temporal_Keyword: pre-World War II Temporal_Keyword: WWII Temporal_Keyword: World War II Temporal_Keyword: 1936 to 1941 Temporal_Keyword: 1936 Temporal_Keyword: 1937 Temporal_Keyword: 1938 Temporal_Keyword: 1939 Temporal_Keyword: 1940 Temporal_Keyword: 1941 Temporal_Keyword: 1947 Temporal_Keyword: 1930s Temporal_Keyword: 1940s Temporal_Keyword: Great Depression Temporal_Keyword: Dust Bowl Access_Constraints: 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. Use_Constraints: 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Deette Lund Contact_Organization: Illinois State Geological Survey Contact_Position: Assistant Supportive Scientist Contact_Address: Address_Type: mailing and physical address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-265-5642 Contact_TDD/TTY_Telephone: 217-785-0211 Contact_Facsimile_Telephone: 217-244-2785 Contact_Electronic_Mail_Address: lund@isgs.illinois.edu Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday Contact_Instructions: Contact this individual ONLY for specific information about the use of this data set. For general questions about distribution, or availability of other data, please contact the Database Administrator listed under the Distribution_Information section. Data_Set_Credit: > Funding source: United States Army Corps of Engineers (USACE) > Funding source: Institute of Museum and Library Sciences (IMLS) > Data automation: Deette Lund, Sheena Beaverson > GIS processing: Robert White, Deette Lund, Tim Coulombe > Documentation: Deette Lund, Ray Peterlin, Andrew Baker, Tim Coulombe > QA/QC: Deette Lund, Sheena Beaverson Native_Data_Set_Environment: PROJECT YEARS 2001-2005: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4 PROJECT YEARS 2005-2008: Microsoft Windows XP Professional Version 2002 Service Pack 2 Cross_Reference: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: Unpublished Material Title: Illinois Historical Aerial Photographs: 1936 to 1941 Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Cross_Reference: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: Unpublished Material Title: Illinois Historical Aerial Photographs: Schematic County Indexes Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Cross_Reference: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: Unpublished Material Title: Illinois Historical Aerial Photographs: Photo Mosaic County Indexes Geospatial_Data_Presentation_Form: raster digital data Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Cross_Reference: Citation_Information: Title: ISGS Terms of Use Online_Linkage: http://www.isgs.illinois.edu Cross_Reference: Citation_Information: Title: University of Illinois Web Privacy Notice Online_Linkage: http://www.vpaa.uillinois.edu/policies/web_privacy.cfm Cross_Reference: Citation_Information: Title: University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4) Online_Linkage: http://www.uillinois.edu/trustees/rules.cfm#sec34 Cross_Reference: Citation_Information: Title: Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign Online_Linkage: http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Center point locations are approximate. Logical_Consistency_Report: Not Applicable Completeness_Report: Not Applicable Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Center point locations are approximate. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not applicable. Lineage: Process_Step: Process_Description: SCANNING METHODOLOGY: Original copies of the county indexes are located at the University of Illinois Map and Geography Library. Special permission was granted by the Library for the county index sheets to be scanned at an offsite location. The indexes were scanned on a large format Eagle 4080 scanner located at the Illinois State Geological Survey. The photo indexes were scanned at 600 dpi and the line indexes were scanned at 300 dpi (2001-2004). In December 2004 Historic Information Gatherers, Inc.(HIG), Hopkins, Minnesota, scanned all of the remaining county index sheets (photo mosaic and line indexes that hadn't already been scanned by the ISGS) available at the UIUC Map and Geography Library (~1700 sheets). In Spring 2005 HIG provided the ISGS with digital images of the photo and line indexes. The indexes were scanned on a large format Vidar Titan Atlas P93 scanner temporarily located at the UIUC Map and Geography Library. The photo indexes were scanned at 300 dpi and the line indexes were scanned at 400 dpi (2004). Process_Date: 2001-2003 & 2004 Process_Step: Process_Description: GEOREFERENCING: The scanned images were georeferenced using Erdas Imagine ( Othrobase version 8.5 (2003-2004); LPS version 8.7 (2005-2007); LPS version 9.1 (2008)). The reference base used were United States Geological Survey Digital Raster Graphic (DRG) files , which are available on the Illinois Natural Resources Geospatial Clearinghouse. A minimum of 5 ground control points (GCP's) were selected for each image. The maximum RMSE allowed was 1.0 (5 meters). Process_Date: 2003 to 2008 Process_Step: Process_Description: CENTER POINT CREATION: Using a combination of software (ArcView 3.2 and ArcGIS 8.3 (2003-2004); ArcGIS 9.0 (2005-2008)) center point data layer shapefiles were created in ArcView using the georeferenced county indexes for each county. Center points were created for all known aerial photographs listed or shown on the county index sheets, whether or not the photographs were available for scanning. Photo center point locations are best approximation. Points were established by the following method. Two different methods were employed, one for the photo mosaic indexes and a second for the line indexes. Photo mosaic index: >Example: 20 center points are needed in the flight line. >1) Place the first point in what would be the approximate center of the first photo in the flight line. >2) Start adding additional points after the first one, spaced closely together. >3) When you get to point 19, make certain it is not already beyond the last photo in the flight line on the index sheet. >4) Place the 20th point on the approximate center of the last photo in the flight line. >5) Use the alignment tool and evenly distribute the points between the two end points. >6) Use the rotation tool and adjust the entire flight line as needed, so that the center points for each of the photos are still situated at the approximate center of their respective photo locations. >7) Repeat steps 1-6 for each flight line. Line index: >Example: 20 center points are needed in the flight line. >1) Place the first point on the center of the annotation for the first photo in the flight line. >2) Start adding additional points after the first one, spaced closely together. >3) When you get to point 19, make certain it is not already beyond the last annotated photo in the flight line on the index sheet. >4) Place the 20th point at the approximate center of the annotation for the last photo in the flight line. >5) Use the alignment tool and evenly distribute the points between the two end points. >6) Use the rotation tool and adjust the entire flight line as needed, so that the center points for each of the photos are still located at the approximate center of their respective annotations. >7) Repeat steps 1-6 for each flight line. Process_Date: 2003 to 2008 Process_Step: Process_Description: ADD ATTRIBUTES: Import supplemental information about each photograph into the appropriate record entry in the associated .dbf file. Process_Date: 2003-2008 Process_Step: Process_Description: ADD PROJECTION INFORMATION: Define the projection of the shapefile. Process_Date: 2003 - 2008 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: > Attribute items are in typical ARC/INFO feature class format. > > POINT ATTRIBUTES: > Point attributes indicate approximate center points of historical > aerial photographs. Point items other than the Arc/Info defaults are > as follows: > > IMAGE_SCAN - Availability > YES - Aerial photograph is scanned and available on-line. > NO - Aerial photograph is shown or listed on a > county index but has not been scanned because of > the following reasons: > a) not available, > b) damaged and/or unusable, > c) no funds were available. > > FILE_NAME - Electronic file name > Naming conventions for file names are based on annotation > included on the photographs and include codes for county, > roll number, and exposure number; zeros are used as > placeholders. Flight line information is not included in > the file name. > > Annotation example from file "0bwq04036.sid": > 11-15-38 12:30 AAA SCALE 1:20,000 BWQ 4-36 > > 11-15-38 = acquisition date (November 15, 1938) > 12:30 = acquisition time (12:30 PM Central Standard Time) > AAA = Agricultural Adjustment Administration > SCALE 1:20,000 = Representative Fraction (RF) scale, > 1 unit on the photograph equals 20,000 units on > the ground. > BWQ = county code for Cook County, Illinois > 4-36 = roll-exposure number; film roll=4, exposure=36 > > CNTY_NAME - County name > > CNTY_CODE - Unique county code as annotated on the aerial photograph > > CNTY_FIPS - County 3-digit FIPS code > > DATE_FLOWN - Acquisition date of aerial photograph represented > as yyyymmdd (year, month, day) > > TIME_FLOWN - Time of exposure > Indicates acquisition time of aerial photograph > xx:xx - Time of day (note: aerial photographs > from these collections were not flown > during night time hours) > unknown - Aerial photograph was not available > or county photograph mosaic index did > not show any annotation regarding time. > no stamp - Aerial Photograph was available, but > neither the photograph nor the > photograph mosaic county index show a > time stamp. > > FLIGHT_LIN - Flight line number > The location of the first flight line in each county is > dependent on whether the flight line orientation is north > to south or east to west. If the flight line orientation > is north to south, then flight line 1 is the first > vertical line of photographs on the left side of > the county index. > > If the flight line orientation is east to west, > then flight line 1 is the first horizontal line > of photographs at the top of the county index. > > ROLL_EXP - Hyphenated number > The first number represents the film roll number which is > the source of the photograph. The second is the exposure > number of the photograph on that film roll. > > IMAGE_SRC - Abbreviation of collection from which the photograph > was acquired > ISL - Illinois State Library > UIUC - University of Illinois Urbana Champaign Map and > Geography Library > Peoria - United States Department of Agriculture Farm > Services Agency in Peoria, Illinois > Lake - Lake County, Illinois Planning Department > SIUC - Southern Illinois University Carbondale > Morris Library > > CD_ROM - Number indicating CD # out of total # of CD's for a given county > > NOTES - Any notes or comments about the aerial photograph > > URL - Hyperlink to MrSID file for viewing or downloading image Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois Contact_Position: Clearinghouse Administrator Contact_Address: Address_Type: mailing and physical address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-244-9306 Contact_TDD/TTY_Telephone: 217-785-0211 Contact_Facsimile_Telephone: 217-333-2830 Contact_Electronic_Mail_Address: beavrsn@isgs.illinois.edu Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday Contact_Instructions: Contact this individual ONLY for specific information about distribution of this data set, or availability of other data. Resource_Description: A county shapefile is currently available free of charge at the Illinois Natural Resources Geospatial Data Clearinghouse. Refer to the Identification_Information portion of this file for access to downloadable data and metadata. Distribution_Liability: 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. Metadata_Reference_Information: Metadata_Date: 20090416 Metadata_Review_Date: 20090416 Metadata_Future_Review_Date: 2009 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Illinois State Geological Survey Contact_Person: Deette Lund Contact_Position: Assistant Supportive Scientist Contact_Address: Address_Type: mailing and physical address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-265-5642 Contact_TDD/TTY_Telephone: 217-785-0211 Contact_Facsimile_Telephone: 217-244-2785 Contact_Electronic_Mail_Address: lund@isgs.illinois.edu Hours_of_Service: 8:00 a.m. - 5:00 p.m., Monday-Friday Contact_Instructions: Contact this individual ONLY for specific information about the metadata for this data set. For general questions about distribution, or availability of other data, please contact the Database Administrator listed under the Distribution_Information section. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. Metadata_Use_Constraints: The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section.