Historical Imagery\nViewer
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\nHistorical Aerial Photography (1930 to 2005)
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\nCurrent and historic imagery form an important part of the NSW Foundation\nSpatial Data Framework and provide a valuable resource which is widely accessed\nby government and the broader community on a daily basis. As the completeness\nof this data base continues, its market demand also increases across a broad\nrange of applications.
The\nHistorical Air Photo Enhancement program (HAPE) not only allows the capability\nto search, discover and use source imagery, but also provides the delivery and\nviewing of enhanced historic rectified imagery mosaics. This new development\nmeans the community at large can now access and utilise spatially accurate\nhistoric imagery data directly in a wide range for GIS Mapping applications.
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\nThere are two products accessible on the Historical Imagery Viewer:
Historical Aerial\nPhoto Images (HAP)
These are standard 600dpi unprocessed frames as JPG\u2019s
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\nSpatial Services has a huge repository of digitised Historical Aerial\nPhotography.\u00a0 The collection has been acquired over a number of years from\n1930 through to 2005. The imagery was\u00a0originally\u00a0captured using a\nvariety of cameras including the Wild RC-5, RC-10 and Leica RC-30 cameras with\na variety of lenses with focal lengths of 88mm, 153mm and 304mm.\u00a0 Images\nwere captured in monochrome\u00a0or\u00a0colour during this period\u00a0at a\nrange of\u00a0scales ranging from 1:10 000 to 1:80 000.\u00a0
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\nImages have been digitised from either the aerial film negatives or hard copy\nprints up 2000dpi resolution depending on the scanned medium.
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\nHistorical Aerial Photo Enhancement Product (HAPE)
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\nThis is a Orthorectified product created from the Historical Aerial Photo\nCollection. A complete 100k coverage of individual photo frames was required\nfor each project area for standard program capture. The Ortho rectification of\nindividual photo frames with 60% forward overlap, that lie within and\nintersecting the relevant 100k map sheet.\u00a0
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\nSpatial Services create the HAPE mosaics with a new process utilising Augmented\nReality Modelling Software.
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\nThis is an automated process using an Augmented Reality Modelling Software to\nproduce a 3D models of an area from simple photographs.
The Hybrid processing\nin this software enables the creation of reality meshes using Spatial Services\narchive of historical Air Photos, the image overlap and the photo centre points\nderived from the original Key Diagrams and flight reports.
From the Historical\nAerial Photos and the \u201cessential information\u201d from the Key Diagrams we are able\nto create a 3d mosaic of the photo frames that we can flatten to a 2D ortho\nphoto mosaic.
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\nAll images are loaded into the reality modelling engines where they go through\na triangulation process with context capture using the X and Y coordinates of\nthe photo centre and the Z coordinate created from the Flying height and other\nessential information.
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\nOnce this has been done the system identifies thousands of tie points and\ncreates the 3D photo Mesh. Once the photo mesh has been created it can be\nflattened into an Ortho Photo mosaic.
\nMetadata
| \n Type\u00a0\u00a0 \n | \n \n Esri Web Application \n | \n
| \n Update Frequency\u00a0\u00a0 \n | \n \n Spatial Services captures and updates\n imagery from advice provided by stakeholders primarily through Imagery and\n Elevation NSW, a working group of the NSW Location Leadership Group. \n | \n
| \n Contact Details\u00a0\u00a0 \n | \n \n Contact us via the\u00a0Spatial Services Customer Hub \n | \n
| \n Relationship to Themes and\n Datasets\u00a0\u00a0 \n | \n \n NSW Imagery Theme of the Foundation\n Spatial Data Framework (FSDF)\u00a0\u00a0 \n | \n
| \n Accuracy\u00a0 \n | \n \n
| \n
| \n Spatial Reference System\u00a0 | \n \n Geocentric Datum of Australia 1994\n (GDA94), Australian Height Datum (AHD)\u00a0\u00a0 \n | \n
| \n Spatial Reference System\u202f\u202f\u202f\u00a0 | \n \n EPSG 4326: WGS 84 Geographic\n 2D\u00a0\u00a0 \n | \n
| \n WGS 84 Equivalent To \n | \n \n GDA94\u00a0\u00a0 \n | \n
| \n Spatial Extent\u00a0\u00a0 \n | \n \n Full State \n | \n
| \n Standards and\n Specifications\u00a0\u00a0 \n | \n \n
http://www.anzlic.gov.au/resources/anzlic-metadata-profile Spatial Services: Imagery Products Specification\n and Description \n | \n
| \n Distributors\u00a0\u00a0 \n | \n \n Service Delivery, DCS Spatial\n Services | \n
| \n Dataset Producers and\n Contributors\u00a0\u00a0 \n | \n \n Administrative Spatial Programs, DCS\n Spatial Services | \n
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