[Chameleon] Using shapes drawin using ROI tools
tjm at timberline.ca
Wed Jul 6 11:28:08 EDT 2005
Did you ever get anywhere on this? We are needing a similar tool.
I am particularly interested in being able to also Save digitized shapes
into a PostGIS db. Anyone doing this?
Mike Leahy wrote:
> Hello list,
> I'm currently working on a tool that allows users to define study areas
> by selecting features interactively on a map. We've previously
> accomplished with some success using the Rosa applet, but we'd like to
> make the change to Chameleon - browser compatibility and flexibility of
> design being two of the stronger motivators for doing so. However, the
> Chameleon query tool still only allows point selections. Furthermore,
> since the ability to select by rectangle, circle or polygon is somewhat
> important for our application, I'd like to know how difficult it might
> be to use the existing functionality in the ROI group of widgets.
> Basically, what I'd like to know is how I can get the shape(s) drawn
> with the ROI widgets so I can perform queries against a PostGIS table.
> We'll likely be adding functionality for other options (e.g., features
> within a given distance from the ROI, or from selected features), so I'm
> thinking that getting the ROI shapes, performing the appropriate
> queries, then adding classes or layers to the map in Chameleon is likely
> our best option.
> I can probably get this figured out on my own after a fair bit of
> tinkering...but I'm hoping that some of the participants in this list
> can offer a some tips that would give me a head start. Or perhaps there
> are some other widgets, or some ways of using the ROI widgets that can
> accomplish something like what we're looking to do.
> Thanks in advance for any advice.
> Chameleon mailing list
> Chameleon at lists.maptools.org
More information about the Chameleon