John Callahan wrote:
> Regarding the last point, I agree that it's difficult to see which
> direction to go.
Yes,... other people have used some of the tools for showing clinical
drug trial data, rocket test data, educational materials, historical
events, software development project deliverables, ...
> There are so many ways to store geospatial, many of which are resource
> and storage hogs. Imagine having 100 items, each with a URL-style
> field pointing to WMS services and Image and KML overlays to be
> displayed on the same map. Performance would definitely be
> sacrificed. Technically, this doesn't seem to be very hard as Google
> Maps supports these natively. Even if you integrated OpenLayers (or
> similar FOSS Geo map clients), these types of overlays can be easily
> done. Performance and variety of standards jump out at me as the
> biggest obstacles.
>
> On a separate note, what about having a map extension that is similar
> to Timeplot? For example, you can bring in one CSV file or
> spreadsheet that contains dozens or hundreds of data points w.
> location. It could be a 2D array for different types of markers (like
> separate lines on Timeplot) or maybe separate maps (like different
> bands in Timeline.)
That would be a good way to go. You will also probably want Babel to be
able to convert KML files from another domain into Exhibit JSONP. Note
that Timeplot can only load files (except for JSONP) from the same web
domain.
By the way, one of the type of geospatial data that I think will be very
useful is state and county boundaries, starting with those of the U.S.
For example,
http://elections.nytimes.com/2008/results/president/map.html
(switch to "County leaders") is quite an interesting visualization, and
the NY Times has produced a lot of U.S. maps broken down into counties.
If you click on a state on that map, it zooms in and you can then select
each county. I think that kind of map should become a reusable widget,
for anyone to plot any sort of per county data. Do you know where to
obtain the boundaries for the counties and states?
David
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