"The explosive growth of the GeoWeb and geographic information has made GIS powerful media for the general public to communicate, but perhaps more importantly, GIS have also become media for constructive dialogs and interactions about social issues." - Sui & Goodchild
This is an old revision of the document!
from PyQt4.QtCore import * from PyQt4.QtGui import * aLayer = qgis.utils.iface.activeLayer() img = QImage(QSize(800,600), QImage.Format_RGB32) img.fill(QColor(255,255,255).rgb()) p = QPainter() p.begin(img) p.setRenderHint(QPainter.Antialiasing) render = QgsMapRenderer() render.setLayerSet([ aLayer.id() ]) rect = QgsRectangle(render.fullExtent()) render.setExtent(rect) render.setOutputSize(img.size(), 96) render.render(p) p.end() img.save("/tmp/render.png","png")
(compréhension du “portrayal model” portrayalogc.png)
aLayer.loadSldStyle('/path/to/singleSymbol.sld')
<?xml version="1.0" encoding="UTF-8"?> <StyledLayerDescriptor version="1.1.0" xmlns="http://www.opengis.net/sld" xmlns:se="http://www.opengis.net/se" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd"> <NamedLayer> <se:Name>CantonsCH_region</se:Name> <UserStyle> <se:Name>CantonsCH_region</se:Name> <se:FeatureTypeStyle> <se:Rule> <se:Name>Single symbol</se:Name> <se:PolygonSymbolizer> <se:Fill> <se:SvgParameter name="fill">#f1f4c7</se:SvgParameter> </se:Fill> <se:Stroke> <se:SvgParameter name="stroke">#afb38a</se:SvgParameter> <se:SvgParameter name="stroke-width">0.26</se:SvgParameter> <se:SvgParameter name="stroke-linejoin">bevel</se:SvgParameter> </se:Stroke> </se:PolygonSymbolizer> </se:Rule> </se:FeatureTypeStyle> </UserStyle> </NamedLayer> </StyledLayerDescriptor>
Fichier de style : test.sld