Very large MrSID images can be served more efficiently by server-side decodes rather than downloading wavelet coefficients (a.k.a. "streaming"). The value of this element places an upper limit on the size of images that will allow access to their wavelet coefficients. For example, the following will have the effect that all images greater than 1000 megapixels in size will NOT allow wavelet-based access. Images under that size will allow wavelet access if the underlying format supports it:
<MaxWaveletSourceMP>1000</MaxWaveletSourceMP>
For the vast majority of MrSID images, it is beneficial to support streaming wavelet coefficients. Therefore, care should be taken not to set this number too low. The example value of 1000 megapixels represents an image approximately 330,000 pixels square, or 300 GB uncompressed. This is a reasonable value for most situations.