John Callahan wrote:
> A few quick questions regarding the "geo" part of exhibit:
>
>
> 1) Are adding points, lines, and polygons be possible in Exhibit?
> Either in the stable or trunk versions? I see from
> (http://people.csail.mit.edu/dfhuynh/projects/election08/election08.html)
> that ex:polygon is possible. How about for lines?
>
John,
I didn't get much enthusiasm from posting that example, so I didn't see
any benefit from continuing that line of development. Is it something
you really want? If so, then please help me test it and make more
examples for it.
The polygon support is not in trunk/ or tags/ yet. But you can just copy
that example and see how it works.
> 2) Will these still be supported in the next version of Exhibit?
>
If there's enough interest and help...
> 3) Can points, lines, and polygons be included on the same map, in the same
> MapView?
Right now, no, but they should be.
> I have one feed with a "geocoords" field. This field may contain coordinates
> for points, lines, or polygons. It might be necessary to use another field
> to state which type of geometry that item is, then pass that to ex:latlng
> ,ex:polygon, or ex:line????? I may need to split that into different feeds
> for each geom type, not sure yet.
>
I'm thinking
<div ex:role="view" ex:viewClass="Map"
ex:latlng="..." // for points
ex:polygon="..."
ex:polyline="..."
></div>
> For the long run, I'd love to work on some other possibilities. For example,
> textual coordinates are cumbersome when dealing with 6 places past the
> decimal point for hundreds of records. It would be nice to support links to
> KML files, GeoRSS Simple feeds, WMS services, maybe CSV or text files with
> coordinates. These formats people can easily create
> using Geo-types of software and can upload to a server. Some of these return
> images to overlay, some return lists of coordinates. Thinking about it now,
> maybe it's an external application's job to parse out KML files or CSV/TXT
> files and pass coordinates into Exhibit. Something for the future.
>
That would be useful to a lot of other people. But because Exhibit can
be very useful to many different groups of people in different ways,
it's very hard for me to pursue any particular direction. So, if you
really want the geo aspect of Exhibit to grow more powerful, you'd have
to be the person spearheading that effort.
David
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