Thanks
I took what I needed from BasicLayer and just force feed it a list of
OMPoints. This gave me a bunch of square things of course, but it seems to
be drawing OK.
What would be really swell now is a utility to convert an OMPoint list to am
OMImage. Actually I was supposed to look at OMGrid, but I haven't yet. I
suspect the data is gridded but I don't know for sure.
Is there some sort of gridding utility available in OM?
Bill Sutphin
Naval Undersea Warfare Center, Division Newport
Bldg 1351, Room 211C
Newport, RI 02841
(401) 832-5813
DSN 432-5813
> -----Original Message-----
> From: Don Dietrick [mailto:dietrick_at_bbn.com]
> Sent: Friday, February 20, 2009 12:30
> To: Sutphin, William B CIV NUWC NWPT
> Cc: openmap-users_at_bbn.com
> Subject: Re: [OpenMap Users] ASCII Lat Long Ht Data
>
> I'd extend OMGraphicHandlerLayer, rather than use PlugInLayer.
>
> When you extend OMGraphicHandlerLayer, you override the
> prepare() method to react to projection changes, and return
> the OMGraphicList you want displayed for the new projection.
> You can call
> getProjection() to get the current projection for use in prepare().
> Don't forget to call generate(Projection) on the OMGraphics
> in the list you return.
>
> If you call getList() from within prepare(), it will return
> the OMGraphicList currently being used by the layer. If that
> list is null, you know prepare() is being called for the
> first time, which also indicates the first time the layer is
> part of the map. This is a good indicator of when to do
> initialization work.
>
> It's good practice to always return a new OMGraphicList from
> the prepare method, even if it means simply adding the same
> OMGraphics to the new list. This is more important if there
> are a lot of repaints() occurring.
>
> I think I'd maks a simple layer for querying the server for
> the data and build up an OMGrid object with the results. If
> performance becomes an issue, I think I would move to the
> ImageTileLayer model, with ImageTiles modified to make
> queries to the server and caching the image results on a
> tile-by-tile basis.
>
> Hope this helps,
>
> Don
>
>
> On Feb 19, 2009, at 12:52 PM, Sutphin, William B CIV NUWC NWPT wrote:
>
> > I looked at the tutorials, thanks. I'm adding the layer to
> MapBean.
> > Should I use PlugInLayer instead?
> >
> > OpenMap has a lot of fun stuff, its just sometimes hard to tie
> > together or decide which of the many ways to do something.
> >
> > I started with the source to DTED layer, but I'm not convinced yet
> > that this is the most apropos thing.
> >
> > Bill Sutphin
> > Naval Undersea Warfare Center, Division Newport Bldg 1351,
> Room 211C
> > Newport, RI 02841
> > (401) 832-5813
> > DSN 432-5813
> >
> >
> >
> >> -----Original Message-----
> >> From: Guy Pascarella [mailto:guy.pascarella_at_issinc.com]
> >> Sent: Friday, February 13, 2009 11:57
> >> To: Sutphin, William B CIV NUWC NWPT; openmap-users_at_bbn.com
> >> Subject: RE: [OpenMap Users] ASCII Lat Long Ht Data
> >>
> >> Bill,
> >> Here are a couple of tutorials I wrote on how to write a plugin/
> >> layer.
> >> http://www.hazelnutcafe.net/tutorials/
> >>
> >> They may be helpful if you want to access the sounding
> data directly
> >> instead of converting it into something like DTED.
> >>
> >> -Guy
> >>
> >>
> >> -----Original Message-----
> >> From: owner-openmap-users_at_bbn.com
> >> [mailto:owner-openmap-users_at_bbn.com] On Behalf Of Sutphin,
> William B
> >> CIV NUWC NWPT
> >> Sent: Friday, February 13, 2009 9:54 AM
> >> To: openmap-users_at_bbn.com
> >> Subject: [OpenMap Users] ASCII Lat Long Ht Data
> >>
> >> Hi
> >>
> >> I have sounding data in Lat Lon Height ASCII format. Any
> >> recommendations for the best way to display this in openmap?
> >> Even if I write my own Layer derivative, do I use ImageLayer?
> >> Its really more like DTED I would think.
> >>
> >> Thanks
> >>
> >> Bill Sutphin
> >>
> >>
>
>
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Received on Fri Feb 20 2009 - 13:41:52 EST