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Subject: Re: [emergency] CAP Visualization (was RE: CAP Developers' Forum...)
Warning Systems also displayed polygons representing the plumes from chemical disasters - the messages were generated by other CAP providers. We adapted some code we had used to display storm cells in a previous application, and displayed the plumes instead. We used the Pepperwhite mapping software in a VB environment. Well, actually, the map application was VB, and the CAP parser / plume broadcaster was Java. -jeff kyser On Wednesday, May 19, 2004, at 03:28 PM, Art Botterell wrote: > Kon - > > The idea of visualizing aggregate CAP traffic is an interesting one. > The <references> and <incidents> fields provide a mechanism for > associating multiple messages in a graph... provided that the > originator provides them, or that some reliable mechanism can be > devised for inferring such relationships after the fact. As is so > often the case, the holdup appears to be at the input. > > (Of course, relationships could be built on the basis of sender, event > category or whatever, but it seems like in most cases the result would > be a simple set that might not be very interesting visually, except > perhaps when displayed geographically.) > > As for mapping, I've done a couple of demos plotting CAP location data > over a map... I used an open-source platform called OpenMap that reads > various formats including ESRI shape files, but a commercial GIS would > work as well if not better. The ComCARE team (in particular, a > company called GeoDecisions out of Pennsylvania) has also done CAP > plots in a web mapping service. > > The CAP <polygon> tag, in particular, is derived from GML, so > GML-aware platforms should be able to use it pretty directly... > although extracting the points and constructing a new shape is pretty > easy. <geocode> values require the use of polygon lookup tables... > easy in the case of well-known areas like ZIP codes or county (FIPS) > boundaries... less so in the case of system-specific zones that may > not be familiar to all recipients. > > - Art > > > At 11:17 AM -0700 5/19/04, Kon Wilms wrote: >> A few questions for other implementers: >> >> 1. Is anyone else working on data visualization of mass amounts of CAP >> alerts (such as treemaps, hyperbolic graphs, spatial trees, or such)? >> >> 2. I would be interested to hear from the GIS folks as to what formats >> they are using for vector data importing/plotting. If no-one is >> implementing GIS as part of an application, are there any guidelines >> for >> supporting GIS file formats in CAP reception/parsing (or do we need >> some)? >> >> Cheers >> Kon >> > > > To unsubscribe from this mailing list (and be removed from the roster > of the OASIS TC), go to > http://www.oasis-open.org/apps/org/workgroup/emergency/members/ > leave_workgroup.php. >
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