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Subject: RE: [emergency] RE: Geo-GIS subcommittee call tomorrow.
EM use cases requiring high precision positioning accuracy include seismic and other vibration sensors like volcanic warning systems. Similarly sensors which can monitor the structural integrity of dams and bridges (i.e. structural failure monitoring) typically need 1-5 cm resolution. Hydrography applications for monitoring water levels including flood levels and Tsunami warning would need <1m of altitude resolution (remember most of the wave is below the waters surface until it's too late). -hans -----Original Message----- From: Jacob Westfall [mailto:firstname.lastname@example.org] Sent: Thursday, September 10, 2009 2:36 PM To: email@example.com Subject: Re: [emergency] RE: Geo-GIS subcommittee call tomorrow. > Of course China uses GPS and deploys applications in which the WGS 84 CRS is > used. However, as in the US - and most countries for that matter - many > local, regional, and even national geo-applications use other geoids and I can certainly understand they may want to enforce a common CRS for all government data sources, surveying, engineering, transport, etc. What I was interested in is how this chinese law/polcy accounts for interoperability between international systems and formats? > mandates that cadastral data be good to well less than one meter. Would your > property lines to be off by a meter? And talk to any oil company getting > ready to drill a new well. Given the exacting requirements of directional Of course, that's why there are more accurate CRS's available. With regards to Emergency Management needs though, is there a requirement for accuracy greater than 1 meter? It would be interesting to hear if there are some identified use cases. I'll try to attend the meeting but have missed past meetings because Friday's are usually packed for me. -- firstname.lastname@example.org -- --------------------------------------------------------------------- To unsubscribe from this mail list, you must leave the OASIS TC that generates this mail. Follow this link to all your TCs in OASIS at: https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php