John Callahan wrote: > Re: thoughts on spatial filtering, I like the way Exhibit has been > designed thus far, keeping filters separate form views. I was thinking > of the spatial filter as a bounding box issue, with north, south, east , > west coordinates. It would simply be a numeric filter (maybe range > would work?) on each latitude and longitude. In other words, the > spatial filtering would be very to how it is now and separate from the > map view. > > You could have a facet box with a google map dedicated to assigning the > spatial filter. If you don't want to require a Google Maps API key, > then simply have text boxes with north, south, east, west limits. Or > the site developer can create a list of places (predefined spatial > filters) and supply them on the site as a pull-down menu. There are > many ways to allow users to define bounding box coordinates. As long as > the spatial facet accepts only numeric coordinates, you can offer many > possibilities. > > Another option (possibly?) is to allow users to draw a box inside the > Google Map view. It could show up on the map with a dotted red outline > and shaded interior. This would simply define coordinates to pass to > the spatial facet. Or, maybe you have a button that grabs the current > map view and sets those coordinates as the spatial filter. You probably > could also have a parameter that forces the spatial facet bounding box > to always match the google map view. Any case, the google map view > extents and spatial facet bound box would be separate. > In the last option, it seems like we should also plot the items on the same map (so you see what you select). But then that map is a hybrid between a facet and a view, which might be OK. I'll revamp the map view when I get a chance.
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