Top Document: Satellite Imagery FAQ - 3/5 Previous Document: Is there a non-proprietary format for geographical/RS images? Next Document: Imaging Instruments See reader questions & answers on this topic! - Help others by sharing your knowledge Do I need geocoded imagery? In a recent discussion of mountain areas, John Berry (ej10jlbs@shell.com) wrote: The problem that Frank has is that he is working in an area without adequate maps: therefore, he cannot geocode his Landsat using a DTM, because the data available is neither detailed enough or accurate enough to use as an input. He can georegister the imagery using using one or two accurately located ground control points and the corner-point positions given in the image header: these are calculated from ephemeris data of, usually, unknown accuracy (within +/- 1 km), but internal image geometry is good so an x,y shift and a (usually) very small rotation can take care of everything to better than the accuracy of his maps. Positions used should be topographically low, and at the same elevation. GPS is the best solution, as someone else pointed out, if Frank can get in the field. The next problem is the parallax error introduced by the high relief. In his situation, the only answer* is to get SPOT stereopairs and make a DTM or DEM from them. Except in the case of very narrow gorges or slopes steeper than 60 deg. there should be few problems with carefully chosen images (high sun angles, etc). ERDAS has an excellent module for doing this. However, I doubt that Frank has the budget. I believe ERDAS`s Ortho module would then allow Frank to make an Ortho image that would be a perfectly good map. *there may be some LFC or Russian stereo coverage in this area, which would be a lot cheaper than SPOT but would require the use of analog stereo comparators (probably). Even if there were good topographic contour maps for all of Frank's area, the cost of digitising these and turning them into a usable DTM would probably be prohibitive (though there are outfits in Russia who might be able to quote a price affordable to a large western company). User Contributions:Comment about this article, ask questions, or add new information about this topic:Top Document: Satellite Imagery FAQ - 3/5 Previous Document: Is there a non-proprietary format for geographical/RS images? Next Document: Imaging Instruments Part1 - Part2 - Part3 - Part4 - Part5 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: satfaq@pobox.com
Last Update March 27 2014 @ 02:12 PM
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Russians who want to impress their social media followers can now rent huge bouquets of flowers for just long enough to snap an Instagram worthy photo, It's revealed.
Pop up services are advertising on social networks in planning for International Women's Day on 8 March, A public holiday in Russia when women are in the past feted with flowers and other gifts. They're offering 10 minutes with an enormous bouquet sufficient time to perfect the best angle and pose before the courier takes it back, The TJournal news blog reports. One account offers women a fleeting visit from 101 roses for 700 roubles ($12; 10).
Posting selfies with huge bouquets seemingly sent by a boyfriend or secret admirer has been a trend among Russian Instagram and VKontakte social network users for quite a while.
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Another account that 360 TV contacted ended up being a joke set up to mock the new trend, And there was plenty of ridicule from Russians placing comments online. "the secret of a mysterious bunch of flowers from a stranger has been EXPOSED, Writes an individual on Twitter. "might be quintessence of modern values, Says an Instagram surfer, Who suggests similar service aimed at men: "A Rolex download, Two iPhones shared and a selfie taken in a Moscow office with a panoramic view.