112 lines
4.4 KiB
Python
112 lines
4.4 KiB
Python
# 🄯 Association Linux-Alpes
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# Contributeurs : Jean-Christophe Becquet (APITUX), Jacky Volpes, Arnaud Champollion
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# mercredi 13 janvier 2021
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# licence GPL version 3 ou supérieure
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# ce script fait partie du projet CaliÉc
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# voir http://www.linux-alpes.org/caliec/
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import shutil
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import tempfile
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from pathlib import Path
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def main():
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# Paramètres du projet
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tempdir = tempfile.TemporaryDirectory()
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styles_url = 'http://www.linux-alpes.org/osm/ressources/styles/'
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lambert93 = QgsCoordinateReferenceSystem("EPSG:2154")
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wgs = QgsCoordinateReferenceSystem("EPSG:4326")
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wgspm = QgsCoordinateReferenceSystem("EPSG:3857")
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scr = wgspm
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project = QgsProject.instance()
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project.setCrs(scr)
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options = QgsVectorFileWriter.SaveVectorOptions()
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options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteFile
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options.driverName = "GPKG"
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# Correspondances des noms des couches et des styles:
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# "NOM_DE_LA_COUCHE_OSM": ("nom_du_style", "nom_du_layer")
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# Commenter les couches non désirées
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# L'ordre impacte directement l'ordre final des couches
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names = {
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#"OUTPUT_OTHER_RELATIONS": (None, "Autres"),
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"OUTPUT_MULTIPOLYGONS": ("multipolygon", "Surfaces"),
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#"OUTPUT_MULTILINESTRINGS": (None, "Multilignes"),
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"OUTPUT_LINES": ("linestring", "Lignes"),
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"OUTPUT_POINTS": ("point", "Points"),
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}
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# Vérif de l'échelle
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if iface.mapCanvas().scale() > 10000:
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if QMessageBox.warning(iface.mainWindow(), "Zone étendue",
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"La zone est étendue et le téléchargement risque de prendre longtemps",
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QMessageBox.Ok | QMessageBox.Cancel) == QMessageBox.Cancel:
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return
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# Paramétrage du dossier de travail
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settings = QSettings()
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dir = QFileDialog.getExistingDirectory(iface.mainWindow(),
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"Sélectionnez un dossier de travail",
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settings.value("caliec/workingDir"))
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if dir == "":
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return
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settings.setValue("caliec/workingDir", dir)
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workDir = Path(dir)
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# Construction de la requête overpass
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try:
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url = processing.run("quickosm:buildqueryextent", {"EXTENT": iface.mapCanvas().extent()})["OUTPUT_URL"]
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except QgsProcessingException:
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raise Exception("Vous n'avez pas installé l'extension QuickOSM")
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# Barre de chargement animée
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qApp.setOverrideCursor(Qt.WaitCursor)
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message_bar = iface.messageBar()
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progress_bar = QProgressBar()
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progress_bar.setMaximum(0)
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widget = message_bar.createMessage("Chargement", "Récupération des data en ligne")
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widget.layout().addWidget(progress_bar)
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message_bar.pushWidget(widget)
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# Téléchargement du fichier osm et création des couches
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osmfile = str(Path(tempdir.name) / "osm.xml")
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processing.run("native:filedownloader", {"URL": url, "OUTPUT": osmfile})
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layers = processing.run("quickosm:openosmfile", {"FILE": osmfile})
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for osm_name, style_layer_names in names.items():
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# On enregistre le layer dans le gpkg
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options.layerName = style_layer_names[1]
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code, error = QgsVectorFileWriter.writeAsVectorFormat(layers[osm_name], str(workDir / "data.gpkg"), options)
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if code != 0:
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QMessageBox.warning(None, 'Erreur', f"Erreur à l'export de la couche {layer.name()} : \n\n{error}")
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return
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# Les layers suivants seront enregistrés dans le gpkg déjà existant
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options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteLayer
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# On charge le nouveau layer
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style_name, layer_name = style_layer_names
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new_layer = QgsVectorLayer(str(workDir / f"data.gpkg|layername={layer_name}"), layer_name)
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project.addMapLayer(new_layer)
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# On charge le style
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if style_name is not None:
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stylefile = str((Path(tempdir.name) / style_name).with_suffix('.qml'))
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processing.run("native:filedownloader", {"URL": styles_url + f"/{style_name}.qml", "OUTPUT": stylefile})
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new_layer.loadNamedStyle(stylefile)
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try:
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project.removeMapLayer(project.mapLayersByName("OpenStreetMap")[0])
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except IndexError:
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pass
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iface.mapCanvas().refreshAllLayers()
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project.write(str(workDir / 'orient.qgs'))
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try:
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main()
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finally:
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iface.messageBar().popWidget()
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qApp.restoreOverrideCursor()
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