Name: Johnstown_1977_1978 Aerial_Photographs - tile index

Display Field: FileName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This collection of historic aerial photographs contains two missions taken in 1977 and 1978, respectively. The 1977 mission was captured by L. Robert Kimball, Consulting Engineers, Ebensburg, Pennsylvania at 1”=500’ scale and contains 331 photos. The 1978 mission was captured on October 31st, 1978 at a scale of 1:24,000 and contains 84 photos. This collection was given to the Donald W. Hamer Center for Maps and Geospatial Information by the PA Department of Conservation and Natural Resources, Bureau of Geological Survey Library. The photos were scanned at 800 dpi on an Epson Expression 11000 scanner by the Donald W. Hamer Center for Maps and Geospatial Information. Approximate historic aerial photo center points were generated by staff of the Donald W. Hamer Center for Maps and Geospatial Information (https://libraries.psu.edu/maps). Photos were aligned and georeferenced in three dimensions using Agisoft Metashape using a minimum number of ground control points, typically between 5 and 12 depending on the size of the project. Estimates of each camera pose, including geographic coordinates, were then exported as a center point index to the historic aerial photography collection. This center point index is intended to facilitate discovery and access, but not for research purposes. Where photography collections facilitated the generation of high-quality seamless mosaics, these were produced to common research standards and made available along with center point indexes. Please use orthomosaics for measurement, comparison with imagery of other time-periods and other common tasks performed in a geographic information system (GIS). For more information on the methods used to generate center point indexes, orthomosaics, and/or to cite this work please see the following reference: Nathan B. Piekielek, Grace Brittany Waltemate and Karen Schuckman (2022) Evaluating Software Tools to Orthorectify Archival Aerial Photographs, Journal of Map and Geography Libraries, 18:3, 209-229, DOI: 10.1080/15420353.2023.2219257. Historic aerial photograph tile indexes were generated by staff of the Donald W. Hamer Center for Maps and Geospatial Information in ESRI ArcGIS Pro. Each tile Index is based on the collection’s center point index. Photo tile size and rotation were estimated using sample georeferenced photos.

Copyright Text:

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -79.09042583760251
YMin: 40.11571241924081
XMax: -78.63839929443638
YMax: 40.507905691478
Spatial Reference: 4269  (4269)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSFSSolid
Color: [130, 130, 130, 0]
Outline:
Style: esriSLSSolid
Color: [0, 0, 0, 255]
Width: 1
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: false
Supports OrderBy: false
Supports Distinct: false
Supports Pagination: false
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: false
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• FID ( type: esriFieldTypeOID, alias: FID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Roll ( type: esriFieldTypeInteger, alias: Roll )
• Exp ( type: esriFieldTypeInteger, alias: Exp )
• Frame ( type: esriFieldTypeString, alias: Frame, length: 254 )
• Year ( type: esriFieldTypeString, alias: Year, length: 254 )
• Date ( type: esriFieldTypeDate, alias: Date, length: 8 )
• FileName ( type: esriFieldTypeString, alias: FileName, length: 254 )
• URL ( type: esriFieldTypeString, alias: URL, length: 254 )
• Collection ( type: esriFieldTypeString, alias: Collection, length: 254 )
• Location ( type: esriFieldTypeString, alias: Location, length: 254 )
• Resolution ( type: esriFieldTypeString, alias: Resolution, length: 254 )
• X ( type: esriFieldTypeString, alias: X, length: 254 )
• Y ( type: esriFieldTypeString, alias: Y, length: 254 )
• Focal ( type: esriFieldTypeString, alias: Focal, length: 254 )
• Altitude ( type: esriFieldTypeString, alias: Altitude, length: 254 )
• GSD ( type: esriFieldTypeString, alias: GSD, length: 254 )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata