Dylan,
Do you think you could provide me with a little buildings shapefile (with a
small amount of data - even if it's just 2 polygons)?
The most likely problem will be CRSs issues causing scale calculation
problems; I can quickly run it in the debugger.
Thanks,
Dave
On Wed, Jul 26, 2017 at 2:17 AM, Dylan Parry <dylan.pa...@bluefoxtech.co.uk>
wrote:
> Hi Dave/Jody,
>
> Thanks for the replies. I'll combine my replies to both of you as you
> asked similar questions :)
>
> Firstly, I'm using ShapeFiles for my data. I may move to use something
> else later, but during my development stage it's simpler for me to be able
> to drop in replacement data etc if they are simple files.
>
> The original data is in EPSG:27700 (British National Grid), and I'm
> serving it as EPSG:3857. This doesn't appear to be the issue though---I
> repeated the experiments that I'll detail below using both projections and
> got similar results in both. In all cases I chose a fairly large tile size
> to get the most extreme results.
>
> Anyhow, here are the experiments I've tried:
>
> --- start ---
>
> With Point Data
> ===============
>
> SLD
> ===
>
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <StyledLayerDescriptor version="1.0.0"
> xsi:schemaLocation="http://www.opengis.net/sld
> http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd";
> <http://www.opengis.net/sldhttp://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd>
> xmlns="http://www.opengis.net/sld"; <http://www.opengis.net/sld>
> xmlns:ogc="http://www.opengis.net/ogc"; <http://www.opengis.net/ogc>
> xmlns:xlink="http://www.w3.org/1999/xlink";
> <http://www.w3.org/1999/xlink> xmlns:xsi="http://www.w3.org/
> 2001/XMLSchema-instance" <http://www.w3.org/2001/XMLSchema-instance>>
>
> <NamedLayer>
> <Name></Name>
> <UserStyle>
> <Title>red square point style</Title>
> <FeatureTypeStyle>
> <Rule>
> <Title>red point</Title>
> <MaxScaleDenominator>10000</MaxScaleDenominator>
> <PointSymbolizer>
> <Graphic>
> <Mark>
> <WellKnownName>square</WellKnownName>
> <Fill>
> <CssParameter name="fill">#ff0000</CssParameter>
> </Fill>
> </Mark>
> <Size>6</Size>
> </Graphic>
> </PointSymbolizer>
> </Rule>
>
> </FeatureTypeStyle>
> </UserStyle>
> </NamedLayer>
> </StyledLayerDescriptor>
>
> Results
> =======
>
> WMS as PNG (Approx 1:8500)
> ==========================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%
> 2Fpng&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Aroundabout&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 251589.75115165487%2c6775967.934575723%2c-248658.86884834513%2c6778261.
> 045424278
>
> ~126ms on first run (~81ms without SLD)
>
> WMS as VectorTile (Approx 1:8500)
> =================================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=application%2Fx-protobuf%
> 3Btype%3Dmapbox-vector&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Aroundabout&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 251589.75115165487%2c6775967.934575723%2c-248658.86884834513%2c6778261.
> 045424278
>
> ~68ms on first run (~83ms without SLD)
>
> WMS as PNG (Approx 1:17k)
> ==========================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%
> 2Fpng&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Aroundabout&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 253206.87203131313%2c6774771.217351635%2c-247345.
> 1074246937%2c6779357.439048746
>
> ~93ms on first run (~109ms without SLD)
>
> WMS as VectorTile (Approx 1:17k)
> ================================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=application%2Fx-protobuf%
> 3Btype%3Dmapbox-vector&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Aroundabout&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 253206.87203131313%2c6774771.217351635%2c-247345.
> 1074246937%2c6779357.439048746
>
> ~107ms on first run (~135ms without SLD)
>
> With Polygon Data
> =================
>
> SLD
> ===
>
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <StyledLayerDescriptor version="1.0.0"
> xsi:schemaLocation="http://www.opengis.net/sld
> http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd";
> <http://www.opengis.net/sldhttp://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd>
> xmlns="http://www.opengis.net/sld"; <http://www.opengis.net/sld>
> xmlns:ogc="http://www.opengis.net/ogc"; <http://www.opengis.net/ogc>
> xmlns:xlink="http://www.w3.org/1999/xlink";
> <http://www.w3.org/1999/xlink> xmlns:xsi="http://www.w3.org/
> 2001/XMLSchema-instance" <http://www.w3.org/2001/XMLSchema-instance>>
>
> <NamedLayer>
> <Name>Polygon Test</Name>
> <UserStyle>
> <Title>A grey polygon style</Title>
> <FeatureTypeStyle>
> <Rule>
> <Title>grey polygon</Title>
> <MaxScaleDenominator>10000</MaxScaleDenominator>
> <PolygonSymbolizer>
> <Fill>
> <CssParameter name="fill">#cccccc
> </CssParameter>
> </Fill>
> <Stroke>
> <CssParameter name="stroke">#000000</CssParameter>
> <CssParameter name="stroke-width">0.5</CssParameter>
> </Stroke>
> </PolygonSymbolizer>
>
> </Rule>
>
> </FeatureTypeStyle>
> </UserStyle>
> </NamedLayer>
> </StyledLayerDescriptor>
>
>
> Results
> =======
>
> WMS as PNG (Approx 1:8500)
> ==========================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%
> 2Fpng&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Abuilding&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 251589.75115165487%2c6775967.934575723%2c-248658.86884834513%2c6778261.
> 045424278
>
> ~242ms on first run (~220 without SLD)
>
> WMS as VectorTile (Approx 1:8500)
> =================================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=application%2Fx-protobuf%
> 3Btype%3Dmapbox-vector&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Abuilding&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 251589.75115165487%2c6775967.934575723%2c-248658.86884834513%2c6778261.
> 045424278
>
> ~184ms on first run (~189ms without SLD)
>
> WMS as PNG (Approx 1:17k)
> ==========================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%
> 2Fpng&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Abuilding&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 253206.87203131313%2c6774771.217351635%2c-247345.
> 1074246937%2c6779357.439048746
>
> ~95ms on first run (~511ms without SLD)
>
> WMS as VectorTile (Approx 1:17k)
> ================================
>
> http://localhost:8080/geoserver/openmap-local/wms?
> SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=application%2Fx-protobuf%
> 3Btype%3Dmapbox-vector&TRANSPARENT=true&STYLES&LAYERS=openmap-local%
> 3Aroundabout&SRS=EPSG%3A3857&WIDTH=1227&HEIGHT=960&BBOX=-
> 253206.87203131313%2c6774771.217351635%2c-247345.
> 1074246937%2c6779357.439048746
>
> ~5416ms on first run (~362ms without SLD)
>
> --- end ---
>
> The point data didn't really show any issues. It's possible that this is
> because that dataset is pretty sparse in comparison to other datasets that
> I'm working with. The real issues arise when using polygon data---serving
> as VectorTile with the SLD took a whopping 5.5 seconds to generate a
> completely empty tile, but if I turned off the SLD it only took 0.3 seconds!
>
> In reality I'm using TMS combined with GWC, so I'd only see these times
> once when populating the cache, but it means that populating my cache is
> taking an inordinate amount of time longer than it ought to.
>
> Is there a problem with the SLDs that I have used? I basically took the
> default templates and added a MaxScaleDenominator to them, which appears to
> do the job just fine for the PNG request, and also results in the correctly
> empty tile for VectorTile, but it shouldn't be taking so long to produce
> them.
>
> Thanks for your help!
>
> On 26/07/17 00:22, Dave Blasby wrote:
>
> Hi, Dylan,
>
> The VT renderer should be taking the min/max scale range into
> consideration when querying the underlying data.
>
> Do you have access to a dev environment? If you do, please look
> in VectorTileMapOutputFormat#produceMap(). About half way down, you
> should see;
>
> Query query = getStyleQuery(layer, mapContent);
>
> This should be taking the min/max scale denominator into consideration.
>
> Questions;
> 1. what's your SLD
> 2. what type of data set are you using (postgis? shp?)
> 3. could you verify that all your CRSes are setup correctly for the layer
> and request? (it could be calculating the incorrect map scale)
> 4. how are your requests setup? Are you using the SLD in #1? Could you
> give an example request that directly communicates with the WMS (that's
> quick for an image format and slow for a mapbox VT format)?
>
> Thanks,
> Dave
>
>
> ------------------------------
>
> Dylan Parry
> Lead Developer, Blue Fox Technology Ltd
> ------------------------------
>
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