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tweak layout

Jez Nicholson 2018-01-23 13:43:48 +00:00
parent ea1558a21a
commit a17f6bb233
1 changed files with 11 additions and 8 deletions
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MarkersSymbolizer.md

@ -1,3 +1,10 @@
[[Symbolizer|SymbologySupport]] that specifies rendering of a tiff, png or svg image as a directional marker.
Can be used as an alternative to a [[PointSymbolizer]] to give more control over positioning of the image.
[[/images/markers_symbolizer.png]]
## Configuration Options
|*Name*|*Description*|*Default*|Applies to SVG | |*Name*|*Description*|*Default*|Applies to SVG |
--------|------------|---------|----------------| --------|------------|---------|----------------|
|allow-overlap | Allow the symbolizer to overlap others. | false | yes | |allow-overlap | Allow the symbolizer to overlap others. | false | yes |
@ -24,7 +31,7 @@ It can be added to a Rule with line features like:
[[/images/offsets_directions.png]] [[/images/offsets_directions.png]]
The [[MarkersSymbolizer]] should draw blue directional arrows *in the direction of the geometry* (for things like one-way streets). The MarkersSymbolizer should draw blue directional arrows *in the direction of the geometry* (for things like one-way streets).
In case you notice arrows pointing the wrong direction, this means that the segment has been coded in the wrong way. In case you notice arrows pointing the wrong direction, this means that the segment has been coded in the wrong way.
@ -38,10 +45,7 @@ The ST_reverse function of Postgis can fix this (The problem will then be to ide
```xml ```xml
<Rule>
<MaxScaleDenominator>10000</MaxScaleDenominator>
<MarkersSymbolizer spacing="100" file="/Users/artem/Desktop/svg/ladybird.svg" transform="translate(0 -16) scale(2.0)"/> <MarkersSymbolizer spacing="100" file="/Users/artem/Desktop/svg/ladybird.svg" transform="translate(0 -16) scale(2.0)"/>
</Rule>
``` ```
### Dynamic Ellipses ### Dynamic Ellipses
@ -49,15 +53,14 @@ The ST_reverse function of Postgis can fix this (The problem will then be to ide
[[/images/dynamic_ellipse_markers.png]] [[/images/dynamic_ellipse_markers.png]]
```xml ```xml
<MarkersSymbolizer fill="darkorange" opacity=".7" width="20" height="10" stroke="orange" stroke-width="7" stroke-opacity=".2" placement="point" marker-type="ellipse"/> <MarkersSymbolizer fill="darkorange" opacity=".7" width="20" height="10" stroke="orange" stroke-width="7" stroke-opacity=".2" placement="point" marker-type="ellipse"/>
``` ```
CAVEAT: these properties do not apply to SVG files, and SVG transforms are not supported for modifying ellipses (yet). CAVEAT: these properties do not apply to SVG files, and SVG transforms are not supported for modifying ellipses (yet).
OSM currently renders one-way street arrows with Mapnik using several stacked [LineSymbolizers](LineSymbolizer) with varying dash-arrays, but could potentially use the [[MarkersSymbolizer]] in the future: OSM currently renders one-way street arrows with Mapnik using several stacked instances of [LineSymbolizer] with varying dash-arrays, but could potentially use the MarkersSymbolizer in the future:
```xml ```xml
<LinePatternSymbolizer file="/home/mapnik/mapnik/symbols/arrow.png" type="png" width="74" height="8" /> <LinePatternSymbolizer file="/home/mapnik/mapnik/symbols/arrow.png" type="png" width="74" height="8" />
``` ```