Hi, Tom,
Most people are asking for larger gutters around the tiles! You can set it
the size in the code, but there isn't an easy way to change it...
https://github.com/geoserver/geoserver/blob/master/src/extension/vectortiles/src/main/java/org/geoserver/wms/vector/PipelineBuilder.java#L80
I'm not sure why you are getting topological collapse - VTs uses the
Topology Preserving generalisation code (although it backs off to a simpler
method if there's a problem).
cf
https://github.com/geoserver/geoserver/blob/master/src/extension/vectortiles/src/main/java/org/geoserver/wms/vector/PipelineBuilder.java#L297
cf
https://github.com/geoserver/geoserver/blob/master/src/extension/vectortiles/src/main/java/org/geoserver/wms/vector/PipelineBuilder.java#L335
Thanks,
Dave
On Mon, Feb 27, 2017 at 12:51 AM, Tom Cuthill <t...@yambay.com> wrote:
> Hi,
>
>
>
> It doesn’t appear that the guttering setting is entirely working for
> mapbox vector tiles (I’m using the 2.10 snapshot with the vector tiles
> extension). Even though I set the gutter to zero, I still see negative
> pixel coordinates and coordinates greater than 256 when I look at the
> coordinates coming down from the server. The tile size is set to 256. Is
> there someway to turn guttering entirely off, so the features are clipped
> at the tile boundaries?
>
>
>
> Also, I found what appears to be a violation of the mapbox vector tile
> spec. See https://github.com/mapbox/vector-tile-spec/tree/master/2.1.
> When I look at the geojson for a tile I can see one feature with a small
> rectangle geometry which is sliver-like. When I look at the same tile in
> its mapbox format, I get a polygon with the start position, then another
> position, and then the start position. The thinness of the rectangle must
> collapse to the same pixel. So basically what is being served down as a
> polygon is actually line-like (starting at a point, going to another point,
> and then going straight back to the same point). To have a valid polygon
> there must be at least two positions between the start-end coordinate.
> I’ve had to filter these polygons out, since their ring orientation is
> undefined.
>
>
>
> Should I mention this problem as a bug??
>
>
>
> Cheers,
>
> Tom Cuthill
>
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