Re: [OSM-talk] Intriguing artifacts in GeoEye data
I noticed the same on the southern coast of Haiti as well (I have been doing some mapping in and around Jacmel), with some oddities where features and ocean collide, with the ocean being too far inland - and editing of the coastline layer does not appear to be reflected in rendering. David G. Smith PE PLS Synergist Technology Group, Inc. 570.280.6763 -Original Message- From: talk-boun...@openstreetmap.org [mailto:talk-boun...@openstreetmap.org] On Behalf Of John F. Eldredge Sent: Monday, January 18, 2010 10:52 AM To: ce-test, qualified testing bv - Gert Gremmen; talk-boun...@openstreetmap.org; OpenStreetMap talk mailing list Subject: Re: [OSM-talk] Intriguing artifacts in GeoEye data If only man-made artifacts are displaced, but not the terrain, that must be a mapping error. An actual earthquake land-shift would have displaced the terrain, and moved buildings and other artifacts along with the land. -- John F. Eldredge -- j...@jfeldredge.com Reserve your right to think, for even to think wrongly is better than not to think at all. -- Hypatia of Alexandria -Original Message- From: ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl Date: Mon, 18 Jan 2010 15:42:03 To: openstreetmaptalk@openstreetmap.org Subject: [OSM-talk] Intriguing artifacts in GeoEye data If you look at the coast of Haiti, west of port-au-prince some strange artifacts are shown on a lot of places where building and beach clubs (I presume) touch the coast line. Look here for example: http://www.openstreetmap.org/?lat=18.5474002361298lon=-72.574583435zoom=15 and enable the GeoEye data. Under the sea level traces of the coastal buildings are seen. It seems as if the whole of Haiti coastline slided 50 meters southwards due to the quake. It's strange however, that only human constructions leave traces, and this makes this theory less probable. Any thoughts ??? Gert Gremmen - Openstreetmap.nl (alias: cetest) P Before printing, think about the environment. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
2010/1/19 David G. Smith PE PLS dsm...@synergist-tech.com: I noticed the same on the southern coast of Haiti as well (I have been doing some mapping in and around Jacmel), with some oddities where features and ocean collide, with the ocean being too far inland - and editing of the coastline layer does not appear to be reflected in rendering. AFAIK, that's because coastline is rendered not so frequently? Peter. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
[OSM-talk] Intriguing artifacts in GeoEye data
If you look at the coast of Haiti, west of port-au-prince some strange artifacts are shown on a lot of places where building and beach clubs (I presume) touch the coast line. Look here for example: http://www.openstreetmap.org/?lat=18.5474002361298lon=-72.574583435zoom=15 and enable the GeoEye data. Under the sea level traces of the coastal buildings are seen. It seems as if the whole of Haiti coastline slided 50 meters southwards due to the quake. It's strange however, that only human constructions leave traces, and this makes this theory less probable. Any thoughts ??? Gert Gremmen - Openstreetmap.nl (alias: cetest) Before printing, think about the environment. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
If only man-made artifacts are displaced, but not the terrain, that must be a mapping error. An actual earthquake land-shift would have displaced the terrain, and moved buildings and other artifacts along with the land. -- John F. Eldredge -- j...@jfeldredge.com Reserve your right to think, for even to think wrongly is better than not to think at all. -- Hypatia of Alexandria -Original Message- From: ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl Date: Mon, 18 Jan 2010 15:42:03 To: openstreetmaptalk@openstreetmap.org Subject: [OSM-talk] Intriguing artifacts in GeoEye data If you look at the coast of Haiti, west of port-au-prince some strange artifacts are shown on a lot of places where building and beach clubs (I presume) touch the coast line. Look here for example: http://www.openstreetmap.org/?lat=18.5474002361298lon=-72.574583435zoom=15 and enable the GeoEye data. Under the sea level traces of the coastal buildings are seen. It seems as if the whole of Haiti coastline slided 50 meters southwards due to the quake. It's strange however, that only human constructions leave traces, and this makes this theory less probable. Any thoughts ??? Gert Gremmen - Openstreetmap.nl (alias: cetest) Before printing, think about the environment. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
Sounds like buildings drawn precisely from high-res but poorly georeferences aerial photos. Looking at a sat-image you don´t know if not all of that photo is 50 or 200 meters off unless you are on the ground to compare. On Mon, Jan 18, 2010 at 4:51 PM, John F. Eldredge j...@jfeldredge.com wrote: If only man-made artifacts are displaced, but not the terrain, that must be a mapping error. An actual earthquake land-shift would have displaced the terrain, and moved buildings and other artifacts along with the land. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
This IS a picture ! Not drawn ! It coincides with a aftershock location Gert -Oorspronkelijk bericht- Van: Marcus Wolschon [mailto:marcus.wolsc...@googlemail.com] Verzonden: maandag 18 januari 2010 21:56 Aan: j...@jfeldredge.com CC: ce-test, qualified testing bv - Gert Gremmen; talk-boun...@openstreetmap.org; OpenStreetMap talk mailing list Onderwerp: Re: [OSM-talk] Intriguing artifacts in GeoEye data Sounds like buildings drawn precisely from high-res but poorly georeferences aerial photos. Looking at a sat-image you don´t know if not all of that photo is 50 or 200 meters off unless you are on the ground to compare. On Mon, Jan 18, 2010 at 4:51 PM, John F. Eldredge j...@jfeldredge.com wrote: If only man-made artifacts are displaced, but not the terrain, that must be a mapping error. An actual earthquake land-shift would have displaced the terrain, and moved buildings and other artifacts along with the land. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
WMS are with serious offset and no one haven't provided GPS references yet. Maybe that's the reason. Cheers, Peter. 2010/1/18 ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl: If you look at the coast of Haiti, west of port-au-prince some strange artifacts are shown on a lot of places where building and beach clubs (I presume) touch the coast line. Look here for example: http://www.openstreetmap.org/?lat=18.5474002361298lon=-72.574583435zoom=15 and enable the GeoEye data. Under the sea level traces of the coastal buildings are seen. It seems as if the whole of Haiti coastline slided 50 meters southwards due to the quake. It's strange however, that only human constructions leave traces, and this makes this theory less probable. Any thoughts ??? Gert Gremmen - Openstreetmap.nl (alias: cetest) Before printing, think about the environment. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
So, you are saying that the post-earthquake photographs show the buildings 50 meters from where the pre-earthquake photographs show them, but there is no difference in the location or appearance of the terrain? Unless the buildings in question are on wheels, and might have rolled to their new location, it seems unlikely that a landslide strong enough to displace buildings by 50 meters would leave no visible traces other than displaced buildings. --Original Message-- From: ce-test, qualified testing bv - Gert Gremmen To: Marcus Wolschon To: John Eldredge Cc: talk-boun...@openstreetmap.org Cc: OpenStreetMap talk mailing list Subject: RE: [OSM-talk] Intriguing artifacts in GeoEye data Sent: Jan 18, 2010 3:01 PM This IS a picture ! Not drawn ! It coincides with a aftershock location Gert -Oorspronkelijk bericht- Van: Marcus Wolschon [mailto:marcus.wolsc...@googlemail.com] Verzonden: maandag 18 januari 2010 21:56 Aan: j...@jfeldredge.com CC: ce-test, qualified testing bv - Gert Gremmen; talk-boun...@openstreetmap.org; OpenStreetMap talk mailing list Onderwerp: Re: [OSM-talk] Intriguing artifacts in GeoEye data Sounds like buildings drawn precisely from high-res but poorly georeferences aerial photos. Looking at a sat-image you don´t know if not all of that photo is 50 or 200 meters off unless you are on the ground to compare. On Mon, Jan 18, 2010 at 4:51 PM, John F. Eldredge j...@jfeldredge.com wrote: If only man-made artifacts are displaced, but not the terrain, that must be a mapping error. An actual earthquake land-shift would have displaced the terrain, and moved buildings and other artifacts along with the land. -- John F. Eldredge -- j...@jfeldredge.com Reserve your right to think, for even to think wrongly is better than not to think at all. -- Hypatia of Alexandria ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Intriguing artifacts in GeoEye data
2010/1/18 ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl: This IS a picture ! Not drawn ! It coincides with a aftershock location My first guess was that these were the foundations of the houses but it may be some kind of rubble that slid into the water. I don't know about masonry but it *may* be some technique of building coast houses with extended foundations to prevent them from slowly sliding into the water over the years. Cheers ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
