128 Mpixel camera

  anchor 11:26 16 Nov 08
Locked

I watched a programme yesterday that included an interview with a man from the Ordnance Survey.

It seems that, to update their maps, they are flying over designated areas and take pictures on a high resolution 128 Mega pixel camera.

  Stuartli 11:34 16 Nov 08

The Ordnance Survey maps are updated regularly and consistently using, in our area for instance, a small aircraft based at Blackpool airport.

Also see:

click here

click here

  Stuartli 11:34 16 Nov 08

The Ordnance Survey maps are updated regularly and consistently using, in our area for instance, a small aircraft based at Blackpool airport.

Also see:

click here

click here

  anchor 11:40 16 Nov 08

Stuartli: Yes; the TV interview was with a OS pilot in Blackpool, explained that.

I knew high/res cameras were used but the 128Mp surprised me. Is this the shape of cameras to come?.

  Stuartli 15:22 16 Nov 08

I think you may have been watching Coast...:-)

  Wilham 15:26 16 Nov 08

anchor
Mapmakers along with the rest of us are in some ways quaintly old fashioned. When they set down the photo requirement I would guess the argument could be this...

Unit photo size, A3
Print definition, 1000 dpi both horiz. & vertical
Area = 297x420/(25.4x25.4) sq inches
Pixels needed = Area above x 1000x1000
=193M approx
and they settled for 180Mp

  Wilham 15:51 16 Nov 08

Hmmm....128Mp, so they may be update metric after all.

  Wilham 16:09 16 Nov 08

Stuartli
I watched 'Coast' and what made me sit up was hearing the difference between aerial and satellite lenses in the cameras.

I heard the price bit, that the cameras in orbit cost £200 thousand each. The technical part, if I have it right, is the space camera uses no refraction, only reflection.

  Wilham 17:21 16 Nov 08

The satellite camera info came from another recent BBC program, but can't track it down.

  Stuartli 22:48 16 Nov 08

I saw this particular Coast programme some time ago - it was of especial interest as I live on the North West coast.

  hssutton 10:18 18 Nov 08

I have produced images in the range of 75Mp, but this was done by taking a series of images and stitching them together.

Here's the link click here To an 1 billion pixel image created by stitching 196 images.

It's extremely doubtful that non specialised (compacts, cropped or full frame DSLRs (35mm)cameras) will exceed or even come close to 50Mp due to lenses not being able to resolve the detail produced by Hi Mp.

Studies have shown that even the renowned "L" lenses by canon are at approaching their limit at 24 Mp.

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