Located in north-west France, Landévennec is a rural town home to just over 340 residents as well as a handful of very large Cold War naval vessels. The graveyard was supposed to be a temporary home for the ships before they were turned into scrap metal, but as of today it appears to be more of a graveyard as they have sat in waters of the Aulne river since 2007. The other two WorldView-4 images here feature the town of Landévennec as well as the Pont du Térenez, a cable-stayed bridge that traverses the Aulne. This 30-cm WorldView-4 imagery was collected on September 2, 2018 and has 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 July we checked out the site of a swaying (yes literally swaying) building in China, and for this edition of the 30-cm Color WorldView-3/4 Image of the Month we travel to Europe to the site of a French navy ship graveyard in Landévennec.
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.
Copyright © 2024 All Rights Reserved - 
Leave a Reply