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Posted on January 5th, 2021

30-cm Color WorldView-3/4 Image of the Month – Taipei 101





Taipei 101 has towered over the bustling Taiwanese city of Taipei since December 31, 2004 and was the world’s tallest inhabited building until 2010. At some 509.2 meters (1,671 feet), Taipei 101 is still the 10th tallest in the world. Also pictured here is National Dr. Sun Yat-Sen Memorial Hall and Taipei Arena as well as several images of less descript but equally as colorful locations! These 42-cm WorldView-4 samples were collected on May 18, 2017 at a high tilt (or off-nadir angle) and have been processed by Apollo Mapping for improved clarity and colors. (Satellite Imagery © 2021 Maxar Technologies)

Every time we look at WorldView-3 and WorldView-4 (WV3/4) imagery, we are blown away. And we hope you are equally impressed with the data! In December we checked out a launch pad in Florida the day of a SpaceX mission to space, and for this 30-cm Color WorldView-3/4 Image of the Month we travel across the globe to a city with one of the world’s tallest buildings, Taipei, Taiwan.

WorldView-3 launched in late 2014 and WorldView-4 launched in late 2016; taken together they are the most advanced satellite constellation the commercial marketplace has ever had access to. Here are a few of the features that really set these satellites apart from the competition:

  • Improved Resolution
    • Higher resolution means you can see more detail in WV3/4 imagery.
    • Data collected at nadir will have 31-centimeter (cm) panchromatic, 1.24-meter (m) visible and near infrared, 3.7-m SWIR (WV3 only) and 30-m CAVIS (WV3 only) bands.
    • At 20 degrees off-nadir, the resolution is 34-cm panchromatic, 1.38-m visible and near infrared and 4.1-m shortwave infrared.
  • Additional Spectral Bands
    • If spectral analysis is part of your project, then no other satellite can match WV3 with its: 8 bands of visible and near-infrared data; and 8 shortwave infrared bands which are crucial for geological studies.
  • Better Positional Accuracy
    • With accuracies of 3.5-m CE90% or better (without ground control even!), WV3/4 has no rivals for its enhanced positional accuracy.
  • Daily Revisits
    • At 40 degrees latitude, WV3 is able to image every location daily with 1-meter or better resolution and then every 4.5 days at 34-cm resolution or better.
    • WV4 is no longer collecting new imagery.
  • Increased Collection Capacity
    • WV3/4 feature 13.1-km swath widths (at nadir) with the ability to collect up to 680,000 square kilometer (sq km) of high-resolution data per day per satellite (though WV4 is dead now).
    • Improved control movement gyros translate into larger maximum contiguous collection areas per pass, with up to ~7,500 sq km of mono imagery and ~3,000 sq km of stereo possible.

If you are interested in WorldView-3 and/or WorldView-4 imagery for your next project, please let us know by phone, 303-993-3863, or by email, [email protected].

You can also find more WV3 samples and technical information on our website here and then WV4 samples and information can be found here.

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