Interlaced pngs for tile cache?
I know that Arc10 will provide mixed caches, with using PNG in the middle and JPEG around the outside of the tiled area (I think), to save storage space. I'm still at 9.3.1, and am wondering:
1) can ArcGIS Server create interlaced PNG files for a tile cache?
2) can AGS consume interlaced PNGs in a tile cache, if they're created another way?
Mapping Center Answer:
1) Can ArcGIS Server create interlaced PNG files for a tile cache? No, both ArcGIS Server 10.0 & 9.3.1 do not support creation of interlaced PNG files. Note: Please correct me if you are referring to "interlaced PNG" files in the same way as I am. 'PNG interlacing (formally known as Adam 7) begins by only reading a small percentage of all the data and filling in the empty spaces with an interpolated color value. For every time step, more information is rendered, replacing the "in-between" interpolated colors with the real colors until finally all the data is loaded and rendered.'
2) Can AGS consume interlaced PNGs in a tile cache, if they're created another way? No, we do not support interlaced PNG in a tile cache. Although theoretically there is no reason why it shouldn't work, but we cannot comment as we haven't tested it.
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