enThese are scanned images from aerial photography flow in 1937/38 by the Agricultural Stabilization and Conservation Service, maintained by the National Archives. These images are presented as individual tiles, county-wide and state-wide mosaics. Initially to provide base for digitizing Historic Forest Cover in Delaware. The data set could be used for other similar change analyses. DNREC, Delaware Coastal Programs20040801Delaware 1937 Orthophotographyraster digital dataDelawareDelaware Coastal Programsground condition19371938None planned-75.884835-74.99104639.87589938.374114200162.500000232744.50000047696.500000108013.500000noneaerial photographyscanned imageshistoric imagesforest mappingorthophotographyimageryBaseMapsEarthCoverDelawareSussex CountyKent CountyNew Castle CountyNewarkGeorgetownLewesRehoboth BeachDoverWilmingtonSmyrnaDelaware RiverDelaware BayNone.None, except to cite credit to Delaware Archives, National Archives, and ASCS for the photography and to DCP for the scanning and registration.Raster DatasetDelaware Coastal Programsmailing address
89 Kings Hwy
DoverDE19901USA302-739-3451302-739-2048M-F 0800-1430http://maps.udel.edu/browsegraphics/de1937orthos.gifGIFenFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timemailing addressDoverDE19901
89 Kings Hwy.
USA302-739-3451Carl YetterDelaware Coastal ProgramsEnvironmental Engineer III302-739-2048M-F 0800-163020050224http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileOffline Data0.0000.000RasterPixel1.0000001.00000081Upper LeftFALSENone1pixel codesTRUEGCS_North_American_1983NAD_1983_StatePlane_Delaware_FIPS_0700row and columnmeters1.0000001.000000State Plane Coordinate System7000.999995-75.41666738.000000200000.0000000.000000North American Datum of 1983Geodetic Reference System 806378137.000000298.257222Layer_1Table256ObjectIDObjectIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ValueValueInteger000CountCountDouble000Agricultural Stabilization and Conservation Service1938Records of the Agricultural Stabilization and Conservation Serviceaerial photographWashington D.C.National Archives and Records AdministrationRecord Group 145: Records of the Agricultural Stabilization and Conservation Service
AHP-11-39 CAN #2140
AHP-15-64 (see AHQ -15-64)
AHP-20-87,89,90 CAN#2144
AHQ-15-64 CAN#2137
AHQ-33-47 CAN#2135
AHQ-34-29 CAN#2135
ANH-21-61,110 CAN#2304
ANH-30-76 CAN#2317
ANH-31-14,31,39,40,41,103,104,105 CAN#274720,000photographic paper19371938ground condition1937 PhotosThese were photo prints obtained from National Archives to be scanned into digital form.Delaware Aerial Imagery 1997 State of Delaware1997Server=http://maps.udel.edu; Service=DE_aerial97; ServiceType=image12,000online19970301ground condition1997 imagery1997 imagery is digital orthophotography and provided location information for registration of 1937 photos. John InksterDNREC-Div. Soil and Water Conservationmailing and physical address
408 N. DuPont Hwy., Suite A
GeorgetownDE19947(302) 856-5488M-F 0800-1630The provided 9x9" photographs (1937 Photos) were scanned at 400 dpi on an 11x17" flatbed Microteck XL scanner with SCSI interface.
The output was written to *.TIF files on a series of CD-ROM's. 1937 Phots200109151937 Images1937 Images1997 Imagery1. Heads-up digitizing was used to create ground control points on the 1937 Images using the 1997 Imagery as a reference. Every attempt was made to create GCPs at a standard scale of 1:3,000, however, due to photo quality this was not always possible. The scanned images were then registered to those points. The ground control points were stored for each image tile along with the RMS error from the registration process.
See the included tutorial file for more detail on the registration process. This document was used for training and reference by staff members doing the processing.
2. Registered images (1937 Corrected) were subestted (i.e. cropped) to remove photograph borders, fiducial marks, and distorted edges.
3. Image subsets (1937 Sub) were grouped together by county and combined into image mosaics.Lonnie DyeDelaware Coastal Programsmailing address
89 Kings Hwy
DoverDE19904USA302-739-3451302-739-2048M-F 0800-14301937 CorrectedgccsRMSERDAS Imagine 8.32002 thru 200407311937 SubMetadata imported.L:\1937Photos\Corrected\mosaics\KC\kentcounty.img.xml20040914Metadata imported.L:\1937Photos\New Mosaics 7_04\37kent.img.xml20040914Scanned images of the 1937 aerial photos were registered to 1997 imagery using ERDAS Imagine software. Registered 1937 images were subset (i.e. cropped) to remove photograph borders, fiducial marks, and distorted edges. A best effort was made to ensure complete coverage of the state but some areas may be missing or obscured. No official assessment of accuracy has been done. However, a table of RMS errors for registration are available for each individual photo tile. This is available on request.2005022416131600{68BE5E71-FCF0-4A1C-814F-B99C664C6C11}2006040415540800TRUE{88659BDC-98E6-4404-8BF5-ABFC6392A9D7}Published20050224