def export_to_pdf(self, output_path, dpi=300): settings = QgsLayoutExporter.PdfExportSettings() settings.dpi = dpi return self.exporter.exportToPdf(output_path, settings) The phrase "pyqgis programmer’s guide 3 pdf work" encapsulates two vital GIS automation skills: first, finding or generating a reliable PDF reference for the QGIS 3 Python API, and second, mastering the programmatic creation of geospatial PDFs using PyQGIS.

with open("metadatified.pdf", "wb") as f: writer.write(f) Here are three typical contracts that require a deep understanding of the PyQGIS 3 PDF workflow: 1. Batch PDF Generation from a Template Scenario: A city planning department has 50 district maps. Each PDF must show the same legend, title block, and scale bar, but with a different map extent and a district-specific label.

PyQGIS cannot create hyperlinks natively in PDF export. Instead, export each page separately, then use reportlab or pypdf to add clickable links based on page coordinates extracted from the layout. 3. Automated Print Composer for Sensor Data Scenario: A Python script runs nightly, pulls new raster data from a PostGIS database, updates a QGIS project, and emails a PDF report.

result = exporter.exportToPdf("C:/GIS/output.pdf", settings) if result == QgsLayoutExporter.Success: print("PDF exported successfully") else: print(f"Export failed: result") One of the most powerful uses of PyQGIS PDF workflows is creating atlas-style map books without the QGIS GUI. The QgsLayoutExporter can iterate over features.

# Assuming layout has a coverage layer set layout = project.layoutManager().layoutByName("AtlasLayout") exporter = QgsLayoutExporter(layout) atlas_layout = layout.atlas() atlas_layout.setEnabled(True) atlas_layout.setCoverageLayer(atlas_layer) # polygon grid, e.g., 100 map sheets Export each feature as a separate PDF page or file for i in range(atlas_layout.count()): atlas_layout.setCurrentFeature(i) # Option 1: Single multi-page PDF exporter.exportToPdf(f"C:/GIS/atlas_page_i.pdf", QgsLayoutExporter.PdfExportSettings()) Merging PDFs with PyQGIS QGIS itself does not merge PDFs, but your PyQGIS script can leverage Python’s PyPDF2 or pypdf library after export:

If you have been searching for the definitive "PyQGIS Programmer’s Guide 3 PDF work" , you are likely looking for one of two things: either a downloadable PDF reference for mastering PyQGIS 3, or a workflow to programmatically generate, manipulate, or export PDF documents using the QGIS 3 API.

Whether you are an engineer automating daily map reports, a researcher building a multi-page atlas, or a consultant merging 50 district maps into a single PDF book, the tools are all there in PyQGIS 3. The official programmer’s guide (in its living online form) provides the theory; the code examples in this article provide the practice.

Use a master .qgz with a layout containing one map item. Then: