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mdin617 Tourist Reged: 08/24/05 Posts: 11 Accuracy       09/07/05 12:50 AM Edit   Reply   Quote   Quick Reply   Scott, and everybody here, just an FYI. This data is NOT accurate to the degree that we're used to here. The flooding overlay in particular is provably off by several blocks in some cases. The good news is that it seems to be consistently erring on the side of 'flooded', so it's doubtful that somebody looking at this would be given false hope that their home had survived. Basically, I wouldn't use this overlay to answer peoples' questions about exactly what's going on on the ground in any more than general terms. I suppose that's true of all the imagery we look at, but just keep in mind that this overlay seems to have quite a bit of fudge factor. That being said, I should also point out that it's entirely possible, if not probable, that the guys at NGA and FEMA intentionally introduced a margin zone, because of that inherent uncertainty of 'ground truth', and I both understand and approve that, if that's the case. This post was not in any way meant to take away from the work they're doing, but rather to point out that we are not the data consumers that this information was prepared for, but rather we are also being allowed to look at it, and this is just not what we're used to (or maybe it's just me, who knows). I only brought it up at all because my initial reaction after a week of piecing together floodlines was to think to myself that the flooding had gotten worse somehow, despite the fact that reports are saying that the water is receding. Post Extras

Entire topic Subject Posted by Posted on Katrina Damage Assessment data (updated to Sep14) PenguinOpus 09/05/05 10:05 PM Re: Katrina Damage Assessment data (updated to Sep14) FDICSK   11/29/05 06:40 PM Re: Very Important: Katrina Damage Assessment data CityCoop   09/07/05 07:17 AM Re: Very Important: Katrina Damage Assessment data PenguinOpus   09/07/05 07:23 AM Re: Very Important: Katrina Damage Assessment data Frank4   09/10/05 08:31 AM Re: Very Important: Katrina Damage Assessment data PenguinOpus   09/10/05 10:14 AM Re: Very Important: Katrina Damage Assessment data Frank4   09/10/05 06:42 AM Thanks for posting this harb   09/06/05 05:57 PM Re: Very Important: Katrina Damage Assessment data Mike_in_Florida   09/06/05 02:21 AM Re: Very Important: Katrina Damage Assessment data Mike_in_Florida   09/06/05 03:55 AM Re: Very Important: Katrina Damage Assessment data JasonBo   09/05/05 11:10 PM Re: Very Important: Katrina Damage Assessment data PenguinOpus   09/05/05 11:33 PM Re: Very Important: Katrina Damage Assessment data JasonBo   09/05/05 11:36 PM Re: Very Important: Katrina Damage Assessment data JasonBo   09/05/05 11:44 PM Re: Very Important: Katrina Damage Assessment data jodyly   09/06/05 08:05 AM Re: Very Important: Katrina Damage Assessment data JasonBo   09/06/05 08:13 AM Re: Very Important: Katrina Damage Assessment data jodyly   09/06/05 08:32 AM Re: Very Important: Katrina Damage Assessment data Scott_in_DC   09/06/05 11:51 PM Re: Very Important: Katrina Damage Assessment data tomweis   09/09/05 06:16 PM Thanks! Clear   09/07/05 11:17 AM Accuracy mdin617   09/07/05 12:50 AM Re: Accuracy Mike_in_Florida   09/07/05 06:49 AM

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