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geoinf15:qgsmaprenderer
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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geoinf15:qgsmaprenderer [2017/11/15 21:40] oertz [Etape 2] |
geoinf15:qgsmaprenderer [2018/05/16 10:05] (current) |
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| - | ====== QgsMapRenderer.py ====== | + | ====== Moteur de rendu cartographique QgsMapRenderer ====== |
| ===== Etape 1 ===== | ===== Etape 1 ===== | ||
| * Lancer QGIS | * Lancer QGIS | ||
| - | * Charger une quelconque couche de polygones (cantons de Suisse, etc) | + | * Charger la couche de polygones suivante {{:geoinf15:pk25_decoupage.zip|}} |
| * Dans la console Python de QGIS, ouvrir l'éditeur | * Dans la console Python de QGIS, ouvrir l'éditeur | ||
| * Y insérer le code ci-dessous | * Y insérer le code ci-dessous | ||
| Line 13: | Line 13: | ||
| from PyQt4.QtGui import * | from PyQt4.QtGui import * | ||
| - | img = QImage(QSize(800,600), QImage.Format_ARGB32_Premultiplied) | + | aLayer = qgis.utils.iface.activeLayer() |
| + | |||
| + | img = QImage(QSize(800,600), QImage.Format_RGB32) | ||
| img.fill(QColor(255,255,255).rgb()) | img.fill(QColor(255,255,255).rgb()) | ||
| p = QPainter() | p = QPainter() | ||
| + | |||
| p.begin(img) | p.begin(img) | ||
| p.setRenderHint(QPainter.Antialiasing) | p.setRenderHint(QPainter.Antialiasing) | ||
| render = QgsMapRenderer() | render = QgsMapRenderer() | ||
| - | aLayer = qgis.utils.iface.activeLayer() | ||
| render.setLayerSet([ aLayer.id() ]) | render.setLayerSet([ aLayer.id() ]) | ||
| - | #aLayer.loadSldStyle('/tmp/test.sld') | ||
| rect = QgsRectangle(render.fullExtent()) | rect = QgsRectangle(render.fullExtent()) | ||
| render.setExtent(rect) | render.setExtent(rect) | ||
| Line 27: | Line 28: | ||
| render.render(p) | render.render(p) | ||
| p.end() | p.end() | ||
| + | |||
| img.save("/tmp/render.png","png") | img.save("/tmp/render.png","png") | ||
| </code> | </code> | ||
| + | (compréhension du "portrayal model" {{:ogo13:portrayalogc.png?linkonly|}}) | ||
| ===== Etape 2 ===== | ===== Etape 2 ===== | ||
| - | * Télécharger/décompresser la description de style ci-après {{:geoinf15:test.sld.zip|test.sld}} | + | * Créer un fichier singleSymbol.sld avec la description de style ci-dessous qui utilise un [[http://docs.geoserver.org/stable/en/user/styling/sld/reference/polygonsymbolizer.html|PolygonSymbolizer]]<code> |
| - | * Décommenter la ligne //aLayer.loadSldStyle// et adapter le chemin selon votre système de fichier | + | |
| - | * Sauvegarder le script | + | |
| - | * Exécuter | + | |
| - | + | ||
| - | <code> | + | |
| <?xml version="1.0" encoding="UTF-8"?> | <?xml version="1.0" encoding="UTF-8"?> | ||
| <StyledLayerDescriptor version="1.1.0" | <StyledLayerDescriptor version="1.1.0" | ||
| - | xmlns="http://www.opengis.net/sld" | + | xmlns="http://www.opengis.net/sld" |
| - | xmlns:se="http://www.opengis.net/se" | + | xmlns:se="http://www.opengis.net/se" |
| - | xmlns:ogc="http://www.opengis.net/ogc" | + | xmlns:ogc="http://www.opengis.net/ogc" |
| - | xmlns:xlink="http://www.w3.org/1999/xlink" | + | xmlns:xlink="http://www.w3.org/1999/xlink" |
| - | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | + | 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"> | + | xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd"> |
| - | <NamedLayer> | + | <NamedLayer> |
| - | <se:Name>CantonsCH_region</se:Name> | + | <se:Name>kartenblatt_region</se:Name> |
| - | <UserStyle> | + | <UserStyle> |
| - | <se:Name>CantonsCH_region</se:Name> | + | <se:Name>kartenblatt_region</se:Name> |
| - | <se:FeatureTypeStyle> | + | <se:FeatureTypeStyle> |
| - | <se:Rule> | + | <se:Rule> |
| - | <se:Name>Single symbol</se:Name> | + | <se:Name>Single symbol</se:Name> |
| - | <se:PolygonSymbolizer> | + | <se:PolygonSymbolizer> |
| - | <se:Fill> | + | <se:Fill> |
| - | <se:SvgParameter name="fill">#f1f4c7</se:SvgParameter> | + | <se:SvgParameter name="fill">#f1f4c7</se:SvgParameter> |
| - | </se:Fill> | + | </se:Fill> |
| - | <se:Stroke> | + | <se:Stroke> |
| - | <se:SvgParameter name="stroke">#afb38a</se:SvgParameter> | + | <se:SvgParameter name="stroke">#afb38a</se:SvgParameter> |
| - | <se:SvgParameter name="stroke-width">0.26</se:SvgParameter> | + | <se:SvgParameter name="stroke-width">0.26</se:SvgParameter> |
| - | <se:SvgParameter name="stroke-linejoin">bevel</se:SvgParameter> | + | <se:SvgParameter name="stroke-linejoin">bevel</se:SvgParameter> |
| - | </se:Stroke> | + | </se:Stroke> |
| - | </se:PolygonSymbolizer> | + | </se:PolygonSymbolizer> |
| - | </se:Rule> | + | </se:Rule> |
| - | </se:FeatureTypeStyle> | + | </se:FeatureTypeStyle> |
| - | </UserStyle> | + | </UserStyle> |
| - | </NamedLayer> | + | </NamedLayer> |
| </StyledLayerDescriptor> | </StyledLayerDescriptor> | ||
| </code> | </code> | ||
| + | * Insérer au bon endroit l'instruction d'appel à la méthode loadSldStyle ci-après (en adaptant le chemin d'accès à votre fichier de style)<code> | ||
| + | aLayer.loadSldStyle('/path/to/singleSymbol.sld') | ||
| + | </code> | ||
| + | * Sauvegarder le script | ||
| + | * Exécuter et voyez le résultat | ||
| + | * Modifier la description de style pour distinguer les cartes combinées des cartes standards (utiliser une règle filtrée - [[http://docs.geoserver.org/stable/en/user/styling/sld/reference/rules.html|Rule]] [[http://docs.geoserver.org/stable/en/user/styling/sld/reference/filters.html#sld-reference-filters|Filter]]) | ||
| + | |||
| + | |||
geoinf15/qgsmaprenderer.1510778411.txt.gz · Last modified: 2018/05/16 10:05 (external edit)
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