74 lines
3.3 KiB
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74 lines
3.3 KiB
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From fork-admin@xent.com Mon Sep 9 10:46:03 2002
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51F943F4E8; Sun, 8 Sep 2002 19:24:16 -0400 (EDT)
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From: kragen@pobox.com (Kragen Sitaker)
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To: fork@example.com
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Subject: earthviewer (was Re: whoa}
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Date: Sun, 8 Sep 2002 19:24:16 -0400 (EDT)
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On 9/8/02 7:38 AM, "Gary Lawrence Murphy" <garym@canada.com> wrote:
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> J> ... If you want a region of the globe mapped out to a very
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> J> high resolution (e.g. 1-meter), they can scan the area with
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> J> aircraft LIDAR and add it to the database, thereby making that
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> J> region zoomable to the resolution of the database for that
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> J> area.
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>
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> Can you give us an example of an application where 1-m resolution
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> would be worth the considerable expense?
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Planning battle tactics; for this reason, the intelligence press
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reports, spy satellites have had 1-meter resolution for many years.
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Finding an individual vehicle in a city might occasionally be possible
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with 1-m images and might occasionally also be worth the money.
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For small areas you have legitimate access to, it's probably cheaper
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to go there with a digital camera and a GPS and take some snapshots
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from ground level. Aerial photos might be cheaper for large areas,
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areas where you're not allowed --- or, perhaps, physically able --- to
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go, and cases where you don't have time to send a ground guy around
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the whole area.
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--
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<kragen@pobox.com> Kragen Sitaker <http://www.pobox.com/~kragen/>
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Edsger Wybe Dijkstra died in August of 2002. The world has lost a great
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man. See http://advogato.org/person/raph/diary.html?start=252 and
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http://www.kode-fu.com/geek/2002_08_04_archive.shtml for details.
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