West_Branch_Sheepscot_Historic_Aerial_Photographs_1939-40 Identification Information Citation: Citation Information: Originator: U.S. Fish and Wildlife Service - Gulf of Maine Coastal Program Publication Date: 20041031 Publication Time: Unknown Title: West_Branch_Sheepscot_Historic_Aerial_Photographs_1939-40 Geospatial Data Presentation Form: raster digital data Publication Information: Publication Place: Falmouth, ME Publisher: U.S. Fish and Wildlife Service, Gulf of Maine Coastal Program Description: Abstract: This dataset represents all available aerial photographs of the West Branch of the Sheepscot River for the years 1939-40. The photographs have been scanned, cropped, and georeferenced to allow viewing them together and in combination with other datasets. These images were georeferenced without benefit of systematically established control points, and so have been fit according to the best available controls represented primarily by road crossings, bridges, and other structures. The images will not fit perfectly with other datasets, particularly at their margins. Locational errors may exist in images ranging from 7 to 59 feet (2.2 to 18.0 meters). Purpose: The original purpose of this dataset was to identify gross planform and landuse changes in the West Branch of the Sheepscot River as part of a geomorphological study. The data can be used for these and related purposes, but care should be taken to account for locational errors inherent in the data. Time Period of Content: Time Period Information: Range of Dates/Times: Beginning Date: 5/18/1939 Ending Date: 10/5/1940 Currentness Reference: source dates Status: Progress: Complete Maintenance and Update Frequency: None planned Spatial Domain: Bounding Coordinates: West Bounding Coordinate: -69.60 East Bounding Coordinate: -69.38 North Bounding Coordinate: 44.48 South Bounding Coordinate: 44.22 Keywords: Theme: Theme Keyword Thesaurus: Maine GIS Thesaurus-Theme Theme Keyword: West Branch Sheepscot River Theme Keyword: historic aerial photography Theme Keyword: historic landuse Place: Place Keyword Thesaurus: Maine GIS Thesaurus-Place Place Keyword: Maine Place Keyword: Sheepscot River Access Constraints: There are no restrictions on the use of this data, however, secondary distribution must have this documentation appended, and credit should always be given to the Data source when the data is transferred or printed. Use Constraints: Users must assume responsibility in determining the utility of this data for their purposes. Point of Contact: Contact Information: Contact Organization Primary: Contact Organization: U.S. Fish and Wildlife Service - Gulf of Maine Coastal Program Contact Address: Address Type: mailing address Address: 4R Fundy Road City: Falmouth State or Province: ME Postal Code: 04105 Country: USA Contact Voice Telephone: (207) 781-8364 Hours of Service: Monday through Friday 8:00 am - 5:00 pm EST Data Set Credit: Credit should always be given to the data source and/or originator when the data is transferred or printed. Native Data Set Environment: ArcInfo version 8.3, Microsoft Windows 2000 Data Quality Information Attribute Accuracy: Attribute Accuracy Report: Attribute accuracy is tested by comparison of the source with existing raster and vector digital files. Logical Consistency Report: Spatial accuracy varies for each image and is based on the number and quality of control points used in georeferencing, but all images were processed using the same standards and procedures to identify and incorporate control points. Completeness Report: Dataset is complete. Positional Accuracy: Horizontal Positional Accuracy: Horizontal Positional Accuracy Report: Minumum horizontal accuracy is 18 meters, though the mean horizontal accuracy of the images is under 10 meters. The data retains the edgematching discrepancies inherent in the source, given the lack of complete system of control points. Horizontal positional accuracy for the digital data is tested by visual comparison to the source. Vertical Positional Accuracy: Vertical Positional Accuracy Report: Not applicable Lineage: Source Information: Source Citation: Citation Information: Originator: U.S. Geological Survey Publication Date: multiple dates, 1939-40 Title: Project J-ll, Kennbec County, Maine (see also AAF Project 668) Geospatial Data Presentation Form: Aerial Photograph Publication Information: Publication Place: Washington, D.C. Publisher: U.S. Geological Survey Other Citation Details: Original photographs were printed at a scale of 1:7920, 1 inch at map scale representing 660 feet. Photographs were taken by the U.S. Army Air Force. Photographs are currently held by the contact organization listed below. Source Scale Denominator: 7920 Type of Source Media: Photograph Source Time Period of Content: Time Period Information: Range of Dates/Times: Beginning Date: 5/18/1939 Ending Date: 10/5/1940 Source Currentness Reference: publication date Contact Information: Contact Organization Primary: Contact Organization: Kennebec County Soil and Water Conservation District Contact Position: Contact Address: Address Type: mailing and physical address Address: 9 Green Street Room 307 City: Augusta State or Province: ME Postal Code: 04330 Country: USA Contact Voice Telephone: 207-622-7847 extension 3 Process Step: Process Description: Photographs were scanned on a large-format drum scanner at a resolution of 600 dpi (dots per inch), and cropped to remove collars. They were then georeferenced using ESRI ArcInfo 8.3 Geographic Information System (GIS) software. The images were georeferenced without benefit of systematically established control points, and have been fit according to the best available controls represented primarily by road crossings, bridges, and other structures, inlcuding houses and barns. No fewer than four, and no more than ten, control points were used to transform each image to real-world coordinates. RMS errors resulting from each transformation ranged from 2.2 to 18.0, with the average of the errors being 9.4. The images will not fit perfectly with other datasets, particularly at their margins. Process Date: 10/14/2004 Process Contact: Contact Information: Contact Organization Primary: Contact Organization: U.S. Fish and Wildlife Service - Gulf of Maine Coastal Program Contact Address: Address Type: mailing address Address: 4R Fundy Road City: Falmouth State or Province: ME Postal Code: 04105 Country: USA Contact Voice Telephone: (207) 781-8364 Hours of Service: Monday through Friday 8:00 am - 5:00 pm EST Spatial Data Organization Information: Direct spatial Rreference method: Raster Raster object information: Image format: TIFF (also requires *.TFW files) Number of images: 18 Number of bands: 1 Vertical count: 1 Cell size X direction: 0.288187 - 0.545019 Cell size Y direction: 0.289992 - 0.543130 Bits per pixel: 8 Pyramid layers: TRUE Image colormap: FALSE Compression type: None Raster object type: Pixel Raster display type: pixel codes Raster origin: Upper Left Spatial Reference Information Horizontal Coordinate System Definition: Planar: Grid Coordinate System: Grid Coordinate System Name: Universal Transverse Mercator 1983 Universal Transverse Mercator: UTM Zone Number: 19 Transverse Mercator: Scale Factor at Central Meridian: 0.9996 Longitude of Central Meridian: -69 Latitude of Projection Origin: 0 False Easting: 500000 False Northing: 0 Planar Coordinate Information: Planar Coordinate Encoding Method: Coordinate Pair Coordinate Representation: Abscissa Resolution: 1 Ordinate Resolution: 1 Planar Distance Units: meters Geodetic Model: Horizontal Datum Name: North American Datum of 1983 Ellipsoid Name: Geodetic Reference System 80 Semi-major Axis: 6378137 Denominator of Flattening Ratio: 298.257 Entity and Attribute Information Overview Description: Entity and Attribute Overview: This dataset consists of 18 images listed here. Original image names are preceded by the year in which photographs were taken. 1939_28-13.tif 1939_28-30.tif 1939_28-32.tif 1939_30-4.tif 1939_30-6.tif 1939_40-6.tif 1939_40-8.tif 1939_40-17.tif 1939_40-18.tif 1939_40-20.tif 1939_40-22.tif 1940_10-88nw.tif 1940_10-89ne.tif 1940_10-89nw.tif 1940_10-89se.tif 1940_10-89sw.tif 1940_10-90nw.tif 1940_10-90sw.tif Distribution Information Distributor: Contact Information: Contact Organization Primary: Contact Organization: U.S. Fish and Wildlife Service - Gulf of Maine Coastal Program Contact Address: Address Type: mailing address Address: 4R Fundy Road City: Falmouth State or Province: ME Postal Code: 04105 Country: USA Contact Voice Telephone: (207) 781-8364 Hours of Service: Monday through Friday 8:00 am - 5:00 pm EST Distribution Liability: Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the U.S. Fish and Wildlife Gulf of Maine Coastal Program office, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the U.S. Fish and Wildlife Gulf of Maine Coastal Program, nor any of its contributors, are liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets. Standard Order Process: Digital Form: Digital Transfer Information: Fees: Turnaround: Standard Order Process: Non-digital Form: Fees: Turnaround: Custom Order Process: Available Time Period: Metadata Reference Information Metadata Date: 10/14/2004 Metadata Review Date: Metadata Future Review Date: Metadata Contact: Contact Information: Contact Organization Primary: Contact Organization: U.S. Fish and Wildlife Service - Gulf of Maine Coastal Program Contact Address: Address Type: mailing address Address: 4R Fundy Road City: Falmouth State or Province: ME Postal Code: 04105 Country: USA Contact Voice Telephone: (207) 781-8364 Hours of Service: Monday through Friday 8:00 am - 5:00 pm EST Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata Metadata Standard Version: FGDC-STD-001-1998 Metadata Access Constraints: none Metadata Use Constraints: none