Re: [OpenMap Users] BSB maptech layer

From: Carsten . Madsen <com_at_navicon.dk>
Date: Fri, 12 May 2006 11:25:59 +0200

Hi

I have a layer running which wil load a single BSB file. It has the
following issues:

- Large BSB files uses a LOT of memory. To fix this there needs to be a
way to use the BSB scan line index to only generate pixels for the
current area of interest.

- There is no tile cache so to display multiple BSB's multiple layers
must be created.

regards
/carsten


Miller, Tim wrote:

> Hi Don & Carsten
>
> I'm wondering how things have progressed with the BSB map layer. Is
> there a simple way of using BSB maps similar to using CADRG?
>
> I'd appreciate your help.
>
> Regards
>
> -tim
>
> Tim Miller <tim.miller_at_dsto.defence.gov.au>
>
> ---- Original Message ----
> /From: Don Dietrick <//_dietrick_at_bbn.com_/
> <mailto:dietrick_at_bbn.com?Subject=Re:%20%5BOpenMap%20Users%5D%20BSB%20maptech%20layer>/>
> Date: Mon Jan 23 2006 - 19:49:19 EST/
>
> Sure, the com.bbn.openmap.layer.util.cacheHandler package is the one
> used by rpf and dted.
> - Don
> On Jan 23, 2006, at 3:20 PM, Carsten . Madsen wrote:
> > Hi Don
> >
> > It is java.
> >
> > I need a tile cache of some sort so that I can keep a large number
> > of BSB files (and their geo extent) and generate and delete bitmaps
> > on demand depending on current projection and cache size. Anywhere
> > in OM where I can find such code?
> >
> > /carsten
> >
> > Don Dietrick wrote:
> >
> >> HI Carsten,
> >>
> >> Looks great! So you're working on a port, or tying into GDAL
> >> through JNI?
> >>
> >> - Don
> >>
> >>
> >> On Jan 23, 2006, at 10:20 AM, Carsten . Madsen wrote:
> >>
> >>> Hi
> >>>
> >>> I have been toying with porting GDALs BSB stuff to OM. Here is a
> >>> dump of the effort so far. There is no support for tiling etc
> >>> but loading a single file works ok and is fast. As NOOA are
> >>> giving away 1016 BSB charts this may be of some interest to
> >>> people living in the country of free charts.
> >>>
> >>> regards
> >>> /carsten
> >>>
> >>> <bsb1.png>
>


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Received on Fri May 12 2006 - 06:02:25 EDT

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