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AW3D global digital 3D map
Owns the Worldwide Coverage Superiority
More Utility and High Quality Digital 3D Map
The AW3D is starting to process the precise global digital 3D map using some 3 million data images acquired by the Panchromatic Remote sensing Instrument for Stereo Mapping, It consists of a DEM ( or DSM ) and ortho-rectified images ( ORI ) that indicate geolocation. DEM is compiled this time has a five meters in spatial resolution with five meters height accuracy ( RMSE ) that enables us to express land terrain all over the world. Hence its strong character will prove useful in various areas including mapping, damage prediction of a natural disaster, water resource research etc.
AW3D global digital 3D map - DSM
AW3D global digital 3D map - Relief
Original Data Acquisition Result
Global archive of PRISM stereo scenes ( 35 km x 35 km ).
Over 1 million stereo or triplet sets with cloud level < 30 % / scene in global.
AW3D global digital 3D map
How to Measure Height from Stereo Image
Location differences are depends on the terrain height. Derive digital elevation model ( DEM ) or digital surface model ( DSM ).
AW3D global digital 3D map
Validation Result of AW3D 5m DSM
Stats of height validation with 3,890 CPs in 85 tiles.
The AW3D height accuracy achieved 4.31 m ( RMSE ).
AW3D global digital 3D map
Specification ( EX: Level 1 )
Dataset Contents
Digital surface model ( DSM ) Area: Global land area within 82 deg. of N / S latitudes
Horizontal spacing: 0.15 arcsec ( approx. 5 m )
Management: 1 deg. tile of lat / long, approx. 22,000 tiles in total
Contents:
  - DSM file ( DSM ): 5 m ( RMSE ) in height accuracy
  - Mask file ( MSK )
  - Stack number file ( STK )
  - Header information ( HDR )
  - Scene list ( LST )
  - Quality assurance information ( QAI )
Ortho rectified image ( ORI ) Horizontal spacing: 0.075 arcsec ( approx. 2.5 m )
Management: individual scene unit
Contents:
  - Ortho rectified image for nadir ( ORI ): 5 m ( RMSE ) in geolocation accuracy
  - Header information ( OHR )
Correlation coefficient image ( CCI )
( An intermediate product )
The averaged correlation coefficient distribution image of available stereo pairs in scene‐bases.
Definition: The index shows image matching quality e.g. a correlation coefficient for the aerial correlation matching.
Product Level
Level 1 Level 2 Level 3
Type Digital Surface Model ( DSM ) Digital Surface Model ( DSM ) Digital Terrain model ( DTM )
Coverage Global ( land )
Unit Tile ( 1 degree X 1 degree )
Mesh ( 0.2 degree X 0.2 degree )
AOI
AOI AOI
Resolution 5 m
Horizontal accuracy 5 m ( RMSE )
Vertical accuracy 5 m ( RMSE )
Coordinate system Geographic Lat / Lon ( ITRF97 [ GRS80 ] )
Format GeoTIFF
Image files DSM ( 16-bit integer )
Mask image
DSM ( 16-bit integer )
Mask image
TBD
Height type Ellipsoid height Ellipsoid height or
Elevation ( height above sea level )
Ellipsoid height or
Elevation ( height above sea level )
Minimum sales area
( AOI )
400 km2
* AOI:Single polygon with 4 or more vertices. Each side: 10 km or more. Each angle: 90 degrees or more.
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