The Risks, page-10

from this page: http://www.digitalglobeblog.com/201...atellite-imagery-helps-oil-and-gas-companies/

It says 'WorldView-3, specifically, has an average revisit time of less than one day and is capable of collecting up to 680,000 km2 per day, further enhancing the DigitalGlobe capacity for more rapid and reliable imaging over an area of interest.'

680,000km2 is 1/750th of the earths surface, so it would take two years for Worldview 3 to collect the whole earth's surface. The claims that they can cover and collect 'everything' daily is BS.
Note they use the word 'collect'. They don't specify how long it may take to download the data to earth.

The amount of data alone in the images, even for a small custom commissioned shoot by the satellite, would be so large, with the limited RF communications bandwidth of a satellite, would take days to download the images from the satellite. This would not be cheap. This limitation does not exist for nearmap, you can have terebytes of hardrives on a plane and simply drive them back to the office. Satellite comms are in general, limited, slow and need multiple earth station support around the world for connectivity. This does not come cheap. If they have just one or two earth stations, they will have to wait till the sat passes over these to download for a short time before it moves out of radio sight again


If they were to try and come up with a product like nearmap, once again, the download bandwidth and massive data amounts in the photos may take weeks to capture the same area that nearmap could do in three days, probably for a lower cost and have ten times better resolution.

Nearmap has patents for it's processing engine, the software that allows the processing of an entire metro area's worth of photo data and have it to market in around 3 days. I suspect the worldview 3 could capture the same area ( in the lower res), but could take much longer to download the data. Nearmap's method of using cheap planes, no half billion dollar sat required, no earth station airtime required, no debt to pay off for this expensive gear.
I think these two technologies compared above are operating in a different market and they each have their place and customer base.