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 May, we were captivated by an image of the Stanley Dock Tobacco Warehouse in Liverpool, England. For this edition of the 30-cm Color WorldView-3/4 Image of the Month, we visit the Dun Briste Sea Stack in County Mayo, Ireland, a sea stack that was once joined to the mainland.
This month’s 30-cm WorldView-3/4 image features the Dun Briste Sea Sack, which stands 150-feet tall. It is believed that the sea stack was formed around 350 million years ago. There are many legends describing how the Dune Briste was formed but in 1393, an arch leading to the sea stack collapsed during a storm, according to Dunbriste.com. This may explain why it was named Dún Briste, which is Gaelic for “broken fort.” Maria McNamara, a paleobiologist at the University College Cork in Ireland, told Live Science that it likely formed within tens to hundreds of thousands of years. The stack is layered, sedimentary rock formed during the Carboniferous, a 60-million-year-long period lasting from about 359 million to 299 million years ago. In 2016, daredevil Iain Miller climbed the cliff, according to the Daily Express. That’s the first time a person had set foot on top of the sea stack since 1990 when a group of climbers scurried up the stack. Before that, a team of scientists helicoptered to the top of Dún Briste in the 1980s. They reportedly found the remains of a medieval house and a broken quern stone used for grinding corn, according to Castlebar.News, a news publication in west Ireland. The size and shape of the buildings and this unusual type of gate suggest that these remains date back to medieval times, according to another group that scaled the structure. This 30-cm WorldView-3 image of the Dun Briste Sea Stack was captured on August 10, 2022. The image has been processed by Apollo Mapping for improved perspective, clarity and colors. (Satellite Imagery © 2024 Maxar Technologies)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, sales@apollomapping.com.
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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