View In:   ArcGIS JavaScript   ArcGIS Online Map Viewer   ArcGIS Earth

Service Description: This dataset contains georeferenced aerial imagery from 1927 and 1930 covering the District of Columbia. The original photographs were created as part of early aerial survey efforts and are held within a combined National Archives and Records Administration (NARA) catalog entry (NARA ID 139056920), Record Group 328. The images were scanned by the National Capital Park and Planning Commission, Federal Projects Planning Division (ca. 1926–ca. 1952). A multi-agency collaboration—including the Historic Preservation Office, OCTO, DHS, OP, DOEE, DOH, and FEMS—completed the georeferencing and mosaic development. As part of this effort, the team georeferenced and cataloged the full 1927 aerial photo series of the District, derived from more than 700 high‑resolution image scans. The resulting mosaic and index provide a historic baseline for land use, urban development, environmental analysis, and cultural resource research.

Name: Ortho/Ortho_1927

Description: This dataset contains georeferenced aerial imagery from 1927 and 1930 covering the District of Columbia. The original photographs were created as part of early aerial survey efforts and are held within a combined National Archives and Records Administration (NARA) catalog entry (NARA ID 139056920), Record Group 328. The images were scanned by the National Capital Park and Planning Commission, Federal Projects Planning Division (ca. 1926–ca. 1952). A multi-agency collaboration—including the Historic Preservation Office, OCTO, DHS, OP, DOEE, DOH, and FEMS—completed the georeferencing and mosaic development. As part of this effort, the team georeferenced and cataloged the full 1927 aerial photo series of the District, derived from more than 700 high‑resolution image scans. The resulting mosaic and index provide a historic baseline for land use, urban development, environmental analysis, and cultural resource research.

Single Fused Map Cache: false

Extent:

XMin: -8587139.558535255
YMin: 4690388.845550481
XMax: -8560591.046494873
YMax: 4728243.895526487
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Initial Extent:

XMin: -8587139.558535255
YMin: 4690388.845550481
XMax: -8560591.046494873
YMax: 4728243.895526487
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Full Extent:

XMin: -8587139.558535255
YMin: 4690388.845550481
XMax: -8560591.046494873
YMax: 4728243.895526487
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Pixel Size X: 1.0283345098339176

Pixel Size Y: 1.028334509833917

Band Count: 3

Pixel Type: U8

RasterFunction Infos: {"rasterFunctionInfos": [{ "name": "None", "description": "", "help": "" }]}

Mensuration Capabilities: Basic

Inspection Capabilities:

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Resampling: false

Copyright Text: Office of the Chief Technology Officer, Historic Preservation, DHS, OP, DOEE, DOH, and FEMS

Service Data Type: esriImageServiceDataTypeRGB

Min Values: 0, 0, 0

Max Values: 255, 255, 255

Mean Values: 84.36383497864597, 101.65880207239381, 86.38523261919768

Standard Deviation Values: 33.64587809954013, 28.698458085023123, 30.699032320864504

Object ID Field: OBJECTID

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Name ( type: esriFieldTypeString, alias: Name, length: 200 )
• MinPS ( type: esriFieldTypeDouble, alias: MinPS )
• MaxPS ( type: esriFieldTypeDouble, alias: MaxPS )
• LowPS ( type: esriFieldTypeDouble, alias: LowPS )
• HighPS ( type: esriFieldTypeDouble, alias: HighPS )
• Category ( type: esriFieldTypeInteger, alias: Category , Coded Values: [0: Unknown] , [1: Primary] , [2: Overview] , ...6 more... )
• Tag ( type: esriFieldTypeString, alias: Tag, length: 100 )
• GroupName ( type: esriFieldTypeString, alias: GroupName, length: 100 )
• ProductName ( type: esriFieldTypeString, alias: ProductName, length: 100 )
• CenterX ( type: esriFieldTypeDouble, alias: CenterX )
• CenterY ( type: esriFieldTypeDouble, alias: CenterY )
• ZOrder ( type: esriFieldTypeInteger, alias: ZOrder )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )

Default Mosaic Method: Northwest

Allowed Mosaic Methods: NorthWest,Center,LockRaster,ByAttribute,Nadir,Viewpoint,Seamline,None

SortField:

SortValue: null

Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Bilinear

Max Record Count: 1000

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: 20

Max Mosaic Image Count: 20

Allow Raster Function: true

Allow Copy: true

Allow Analysis: true

Allow Compute TiePoints: false

Supports Statistics: true

Supports Advanced Queries: true

Use StandardizedQueries: true

Raster Type Infos:

Name: Raster Dataset
Description: Supports all ArcGIS Raster Datasets
Help:

Has Raster Attribute Table: false

Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources:   Info   Histograms   Statistics   Key Properties   Legend   Raster Function Infos

Supported Operations:   Export Image   Query   Identify   Download Rasters   Get Image Url   Compute Histograms   Compute Statistics Histograms   Get Samples   Compute Class Statistics   Query GPS Info   Find Images   Image to Map   Map to Image   Measure from Image   Image to Map Multiray   Query Boundary   Compute Pixel Location   Compute Angles   Validate   Project