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:: This script opens a prompt on AUTOCAD2 for running python scripts.
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:: It addresses the following problems:
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:: - CMD can't run on UNC file paths.
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:: - The system PATH environment variable on AUTOCAD2 points to an old Python.
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:: - Installing anaconda for all users requires admin rights.
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:: Define python installation location
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set PYTHONPATH=C:\Users\Public\Anaconda3
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:: Mount current folder on network drive (CMD doesn't like UNC file paths)
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cls
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pushd %~dp0
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:: Activate anaconda environment
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%windir%\system32\cmd.exe /K ""%PYTHONPATH%\Scripts\activate.bat" "%PYTHONPATH%"
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set PYTHON="C:\Program Files\QGIS 3.20.3\bin\python-qgis.bat"
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%PYTHON% export.py
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pause
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"""export.py
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Export layouts from QGIS project to pdf or jpg.
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Each exported map will contain a different combination of EP/type, e.g.
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0.05/'ZSA'
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Usage:
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> export.bat
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This script must be run with the version of python installed with QGIS, that
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is why 'export.bat' is required.
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D Howe
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d.howe@wrl.unsw.edu.au
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2022-05-17
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"""
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import re
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import os
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from qgis.core import (
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QgsApplication,
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QgsProject,
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QgsLayoutExporter,
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QgsLayoutItemLabel,
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)
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QGZ_PATH = 'roches.qgz'
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OUTPUT_DIR = 'maps'
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FORMAT = 'jpg'
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# Initialise QGIS
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qgs = QgsApplication([], False)
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# Load project
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project = QgsProject.instance()
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project.read(QGZ_PATH)
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def unique_attributes(layer):
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"""Get unique values for year, EP, and profile"""
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layer.setSubsetString('') # Remove filter
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# Get all available values for encounter probability and profile type
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eps = []
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types = []
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years = []
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for f in layer.getFeatures():
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eps.append(f.attribute('ep'))
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types.append(f.attribute('type'))
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years.append(f.attribute('year'))
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# Keep unique values
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eps = list(set(eps))
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types = list(set(types))
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years = list(set(years))
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return eps, types, years
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# Get layers with hazard lines (assuming there is a year in the layer name)
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map_layers = project.mapLayers().items()
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layers = [v for k, v in map_layers if re.search(r'\d{4}', v.name())]
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# Get all EP values and profile types from first hazard line layer
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eps, types, years = unique_attributes(layers[0])
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# BUG: repeat first file because of QGIS's incorrect legend placement
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years = [years[0]] + years
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# Get layouts
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layouts = project.layoutManager().layouts()
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# Create outout directory
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os.makedirs(OUTPUT_DIR, exist_ok=True)
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for layout in layouts:
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name = layout.name()
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# Set up plot settings
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if FORMAT == 'pdf':
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settings = QgsLayoutExporter.PdfExportSettings()
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# settings.dpi = -1 # Native resolution
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exporter = QgsLayoutExporter(layout).exportToPdf
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elif FORMAT == 'jpg':
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settings = QgsLayoutExporter.ImageExportSettings()
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exporter = QgsLayoutExporter(layout).exportToImage
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else:
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raise ValueError("'FORMAT' must be 'jpg' or 'pdf'")
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for t in types:
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for e in eps:
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for layer in layers:
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year = re.search(r'\d{4}', layer.name()).group()
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substring = f"ep='{e}' and type='{t}' and year={year}"
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layer.setSubsetString(substring)
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# Update label
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label = f'Type: {t}\nEP: {e}'
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for item in layout.items():
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if isinstance(item, QgsLayoutItemLabel):
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item.setText(label)
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map_path = os.path.join(OUTPUT_DIR, f'{name}-{t}-EP={e}.{FORMAT}')
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print(f'Exporting {os.path.basename(map_path)}...')
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res = exporter(map_path, settings)
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if res != 0:
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msg = 'Export failed. Does output folder exist?'
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raise ValueError(msg)
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