Any thoughts on this from the Rendering Transformation designer?
This same code is causing me problems as well, in a different way. I am
experimenting with rendering transformations which consist of chains of
processes. In particular, I am working with the chain Heatmap->Contour.
It works great in the native CRS of the input data (WGS84 in this case),
but doesn't work when the output CRS is different (e.g. WebMercator).
The reason is that the original query contains a FastBBOX filter in WGS84
CRS, which then filters out the transformed output, since it is in
WebMercator CRS.
Is it really necessary to re-apply the query?
On Wed, Sep 19, 2012 at 3:25 PM, Ian Schneider <[email protected]>wrote:
> In tracking down why a PointStacker transform isn't working, I found
> that the StreamingRenderer adapts the original query then reapplies it
> to the transformed feature collection. StreamingRenderer:2236 on 8.x
> is the start of the relevant block of code.
>
> The issue in my case is that the original query[1] contains an
> attribute that the PointStacker doesn't preserve and hence the second
> query on the transformed collection yields nothing.
>
> Certainly one improvement would be to allow PointStacker to preserve
> one of the aggregated feature's attributes to represent the new
> stacked output feature, but my question is:
>
> Why is the query being run a second time? I could see that preserving
> the BBOX would be useful for transformations that create new features
> that lie outside the initial BBOX but it seems like the other work is
> redundant as the features have already been filtered via the first
> query. I admit I might be short-sighted here.
>
> Regards,
> -Ian
>
> [1] [[ Date = Tue Jan 15 17:00:00 MST
> 1980 ] AND FastBBOX [property=location,
> envelope=ReferencedEnvelope[-216.56249996985542 : 216.56249996985542,
> -75.1441685694744 : 86.89368497984668]]]
>
>
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