Hi, last year I did the imagemosic-jdbc plugin. From my experience, the
interpolation is not the problem, or it is a problem of cpu power. The
space saved on disk is perhaps another argument, but not really, because its
only 1/4 of the base level.
The problem arise in main memory, because you need at least 4 times more
memory as a basis for interpolation. I had calls of the garbage collector
during interpolation slowing down performance.
My tip, do not skip a pyramid level.
christian
Saul Farber writes:
> Gabriel,
>
> I think level zero (the "base" level of a raster) is i ==0
>
> Level one (the "next up" level of a raster) is sometimes skipped because
> it's only 1/4 the size, and on-the-fly interpolation of the interesting
> area can be faster than the space saved by the level-one pyramid area.
>
> I could be wrong though!
>
> --saul
>
> Gabriel Roldan wrote:
>> Hey Saul,
>>
>> I'm having a bit of trouble understanding the usage of ArcSDEPyramid, may be
>> you can bring some light :)
>>
>> I'm pretty sure I've come to an exception in ArcSDEPyramid constructor last
>> week with a raster dataset for which skipLevelOne was set to false.
>>
>> My question is regarding the following snippet in the constructor:
>>
>> for (int i = 0; i < numLevels; i++) {
>> if (i == 1 && rasterAttributes.skipLevelOne()) {
>> continue;
>> }
>> ..........
>>
>> shouldn't it be like this:
>> if (i == 0 && rasterAttributes.skipLevelOne())
>>
>> Cheers
>>
>
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