What are the technical specifications for Google Imagery?

The following are technical specifications for Google’s Aerial Orthoimagery product.

Google Maps for Work Partners only: For a complete list of product details, see the technical whitepaper on the Google for Work Connect site.
RESOLUTION
6" (15 cm); Many other providers offer 12" (30 cm)
POSITIONAL ACCURACY (CE90)
Less than 1 m (Accuracy will achieve 1-meter CE90 in most areas. Accuracy may not meet 1-meter CE-90 in areas of significant relief due to Digital Elevation Model related errors.)
SPECTRAL BANDS
RGB (Red, Blue, Green)
OTHER OFFERINGS
Add-on option of NRG (Near-Infrared, Red, Green)
COVERAGE
Majority of continental U.S.; Portions of Canada; Portions of Western Europe
REFRESH RATE
Every year to every few years, depends on population size and other factors
PROCESSING
Orthorectified and mosaicked
FORMAT
JPEG2000 (4,096 by 4,096 pixels) and map tile pyramid files
COORDINATE SYSTEM

Geographic, WGS84

GEOGCS["WGS 84",
     DATUM["WGS_1984",
          SPHEROID["WGS 84",6378137,298.2570248822722,
               AUTHORITY["EPSG","7030"]],
          AUTHORITY["EPSG","6326"]],
     PRIMEM["Greenwich",0],
     UNIT["degree",0.0174532925199433],
     AUTHORITY["EPSG","4326"]]

CLOUDS 
< 1 percent
BIT DEPTH
8 bits per pixel (scaled from 12-bit source) 
SNOW AND ICE
Only permanent snow or snow above timberline 
SUN ANGLE
≥ 30 degrees 
SMOKE / HAZE
< 1 percent (detail is visible) 
LEAF ON / OFF
Mix of both (Flying throughout the year)
METADATA
Available with purchased imagery files; includes date of flight:
  • Tile-level metadata (mandatory time-stamping [flight capture date])
  • Creation date and person
  • Modification date and person
  • Attribution
  • Image size in pixels
  • Raw size/uploaded size
  • Resolution/max zoom level according to Google's zoom levels
  • Bounds
  • Processing type (masking)

 

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