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Space_Voyeur Tourist Reged: 11/02/06 Posts: 7 Loc: Madrid, Spain Re: SD- Topographic Network of Lines & Oddities **       11/08/06 04:46 AM Edit   Reply   Quote   Quick Reply   Google Earth Bathymetry comes from Etopo global relief grids. They are made from satellite altimetry that measures the deformation of sea surface due to the gravity attraction with sea floor. This is not very accurate, but is the only way to obtain information there where no surveys have been made. Smith and Sandwell are the scientists who developed this methodology. Where echo sounder data is available (Tracks and surveys) they use that data for interpolation in addition to coarse satellite data. http://topex.ucsd.edu/WWW_html/mar_topo.html With this data they interpolate to 2 minutes grid (Etopo 2 ) this is about 2 nautical miles; 3.7 km. So square tiles of almost 4 x 4 km make the digital terrain model that you can see like a continuous surface. When you interpolate dense, accurate, real (not so real, but that is little bit difficult to explain) echo sounder data, merged with coarse satellite data, that linear artefacts appear. Smith and Sandwell are the main scientists in the development of this methodology. http://www.bodc.ac.uk/data/online_delivery/gebco/documents/gridhelp.pdf Of course not all lines are artefacts, as you can see, all ocean ridges are crossed by transform faults and many other linear features associated with tectonic margins http://seismic.cbsnews.google.neopolitan.com/cbs/earthquake_public.kml ). Hawaiian islands are in a line due to a hot spot beneath them etc. But when you see all that radius lines around an important harbour... those are artefacts. So those lines are just an error in the model. It is not very suggesting but if you look it from another point of view, you will realize that is more mysterious in the sea bed morphology that even in Mars surface. Thousands of people have been in the Everest, more than a thousand in the space but only 2 men (Piccard & Walsh) have been close to the deepest place on Earth. They stayed just for 20 minutes and they were far from putting their feet on there. Post Extras

Entire topic Subject Posted by Posted on SD- Land & Sea Anomalies SatAM17 12/08/05 09:13 AM Re: SD- Land & Sea Anomalies KeithPickering   03/19/07 03:08 PM SD- Giza, Peculiar mounds SatAM17   07/08/06 09:09 AM Re: SD- Giza, Peculiar mounds Bobdown   12/11/06 07:38 AM Re: SD- Giza, Peculiar mounds Bobdown   12/11/06 07:12 AM SD- Rennes-le-Chateau, Megalithic Ruin areas SatAM17   07/02/06 02:20 PM SD- NC linear Anomalies SatAM17   06/26/06 05:56 PM Re: SD- NC linear Anomalies Spysat   02/22/08 11:13 AM Re: SD- NC linear Anomalies Space_Voyeur   11/08/06 05:32 AM Re: SD- NC linear Anomalies mallarina   10/22/06 09:55 PM Re: SD- NC linear Anomalies SatAM17   06/27/06 05:22 PM Re: SD- NC linear Anomalies Hill   06/27/06 09:30 PM Re: SD- NC linear Anomalies SatAM17   06/28/06 03:28 PM Re: SD- NC linear Anomalies Lonnie_s   11/28/06 09:19 AM READ THIS FIRST SatAM17   04/17/06 08:12 PM SD- Cuba Linear Anomalies SatAM17   04/16/06 02:57 PM Re: SD- Land & Sea Anomalies syzygy   03/19/06 03:43 AM Re: SD- Land & Sea Anomalies SatAM17   04/03/06 11:39 AM SD- Bahamas Linear Feature SatAM17   01/05/06 06:48 PM SD- California Circles Ancient City? **Tour SatAM17   12/17/05 06:03 PM Re: SD- California Circles Ancient City? **Tour bridger54   11/12/06 12:20 AM Re: SD- California Circles Ancient City **Tour gdwsr   05/02/06 11:18 AM Re: SD- California Circles Ancient City **Tour apbailey   04/27/06 11:32 PM Re: SD- California Circles Ancient City **Tour jims11296   03/23/06 11:41 AM Re: SD- California Circles Ancient City **Tour jims11296   03/23/06 11:27 AM Re: SD- California Circles Ancient City **Tour jims11296   03/23/06 11:23 AM Re: SD- California Circles Ancient City **Tour AWOLSoftwareProductions   03/27/06 04:59 PM Re: SD- California Circles Ancient City **Tour SatAM17   04/03/06 11:34 AM Re: SD- California Circles Ancient City **Tour jims11296   04/05/06 04:22 PM Re: SD- California Circles Ancient City **Tour SatAM17   05/03/06 09:47 AM Re: SD- California Circles Ancient City **Tour SatAM17   07/08/06 11:09 AM SD- Topographic Network of Lines & Oddities **Tour SatAM17   12/16/05 03:55 PM 3 mountains in a row Axeman89   03/03/07 06:47 AM Re: SD- Topographic Network of Lines & Oddities ** Space_Voyeur   11/08/06 04:46 AM Re: SD- Topographic Network of Lines & Oddities **Tour gdwsr   05/04/06 03:26 PM SD- Wyoming Land Anomalies ** Tour SatAM17   12/15/05 08:42 PM Re: SD- Wyoming Land Anomalies ** Tour mobius0001   12/07/07 04:09 PM Re: SD- Wyoming Land Anomalies ** Tour rigup   04/21/07 07:56 AM Re: SD- Wyoming Land Anomalies ** Tour dhdoyle   06/15/06 09:22 PM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   06/20/06 06:47 PM Re: SD- Wyoming Land Anomalies ** Tour davidjmyers   06/24/06 09:47 PM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   06/28/06 03:37 PM Re: SD- Wyoming Land Anomalies ** Tour brgstrm   09/22/06 10:11 AM Re: SD- Wyoming Land Anomalies ** Tour Cintos   05/02/06 08:04 AM Migrating Mountain! Jumble   05/22/06 02:55 PM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   05/02/06 03:44 PM Re: SD- Wyoming Land Anomalies ** Tour Cintos   05/03/06 04:38 AM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   05/03/06 09:38 AM Re: SD- Wyoming Land Anomalies ** Tour Hill   04/14/06 09:32 AM Re: SD- Wyoming Land Anomalies ** Tour mcregger   04/13/06 03:53 PM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   04/17/06 08:18 PM Re: SD- Wyoming Land Anomalies ** Tour SatAM17   05/01/06 04:50 PM Re: SD- Wyoming Land Anomalies ** Tour growler63   03/04/08 04:04 PM SD- Topographic Anomalies- Viewer Discoveries SatAM17   12/12/05 10:08 AM SD- Topo Linear Bermuda Anomaly *DELETED* SatAM17   12/12/05 11:02 AM SD- Topo Bermuda Lines SatAM17   12/12/05 11:06 AM SD- Topo- Mountains in a Row near Scotland SatAM17   12/12/05 10:14 AM Re: SD- Topo- Mountains in a Row near Scotland ProfFrink   05/08/06 09:55 AM Re: SD- Topo- Mountains in a Row near Scotland SatAM17   06/20/06 06:43 PM SD- Chaco Canyon Circle SatAM17   12/08/05 02:12 PM SD- Chaco Canyon Irrigation Works **Tour SatAM17   12/17/05 05:50 PM Re: SD- Chaco Canyon Irrigation Works **Tour Rich_Wooten   07/03/08 09:46 AM Re: SD- Chaco Canyon Irrigation Works **Tour SAYoungWS   10/25/06 05:50 PM SD- Chaco Canyon Squares SatAM17   12/08/05 03:27 PM SD- Belize, Hole Mystery and Patterns SatAM17   12/08/05 12:18 PM SD- Ancient Buried Walls? SatAM17   12/08/05 10:08 AM SD- Greece Underwater Anomaly SatAM17   12/08/05 10:02 AM SD- Greece Underwater Patterns SatAM17   12/08/05 10:04 AM SD- Cay Sal Bank Gridded Anomaly SatAM17   12/08/05 09:59 AM Re: SD- Cay Sal Bank Gridded Anomaly KeithPickering   03/19/07 03:06 PM

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