I'm using the RasterMosaicker to create a series of mosaics through zoom levels. This involves sorting rasters corresponding to their scale, so the largest-scale raster always sits at the top. To get the RasterMosaicker to recognise this, I've set Data Values > Overlapping values: Last.
The rasters therefore are sent in to the Mosaicker from smallest-scale (e.g. 1:1000000) to largest-scale (e.g. 1:5000) and the last data point where there are overlaps will always trump.
This works fine, except I noticed that as I went to higher zoom levels the resolution was appalling, and much lower than my larger-scale maps. I investigated and found in this Scenario: "the first image to hit the RasterMosaicker, defines the spacing of the output raster. If the RasterMosaicker is allowed to do the resampling, the resolution output may be undesirable."
So, it seems that if I could sort my maps so that the largest-scale came first, the RasterMosaicker resolution would be right. However, if I sort my maps that way, I am not able to set overlapping values correctly to first, as Last is the only option for sorting. A bit of a catch 22 - if anyone could offer an insight on how to get around this I'd be very grateful. Thanks!
