Re: [Geotools-gt2-users] JMapPane-slow zooming

[Jody G. <jod...@gm...>]

Another approach is to render into "tiles" which you can then pan
around very quickly; if you are willing to accept fixed zoom levels
you can take a similar approach to zooming.

Jody

On Wed, Apr 15, 2009 at 10:52 PM, Andrea Aime <aa...@op...> wrote:
> Michael Bedward ha scritto:
>> Hello,
>>
>>>> Are there some plans for revisioning JMapPane class in near future relating to this issues?
>>> Not at present.
>>>
>>
>> JMapPane has been rewritten for GeoTools 2.6 but I think you'll find
>> that the drawing speed is pretty much the same.
>>
>> Any suggestions for tweaking JMapPane are most welcome, but since all
>> of the real drawing work is done by the StreamingRenderer class you
>> will need to look there to work out how to achieve any substantial
>> improvement.
>
> To achieve substantial improvements one needs in memory caching.
> It's not a topic I have a personal interest into, but I did provide
> some time ago a caching feature source + spatial index that can be used
> to significantly speed up drawing for small amounts of data.
> There is also a caching module in unsupported made last year
> by a summer of code student, but I really never tried it out
> so I cannot comment on its speed/functionality.
>
> Anyways, it's still in the gt2-users archives, here:
> http://n2.nabble.com/Render-with-gt2.3.1-td1939887.html#a10160606
>
> Cheers
> Andrea
>
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