Georeferenced pdf to digitized layout map

​@pradeephj3571 From your email, are you looking to perform a raster to vector conversion using the data in your georeferenced pdf?

Happy FME :-) ing

SRG

Ya...Excatly

​@pradeephj3571 Converting a georeferenced PDF to vector data in FME is doable, but there are a few key decisions that affect how clean your output will be!

• RasterSelector → isolate bands if needed
• RasterBandInterpreter → convert to grayscale if required

Clean the Raster

Garbage in = Garbage out.

Use:

• RasterExpressionEvaluator → thresholding (e.g., isolate lines)
• RasterConvolver → smoothing
• RasterMosaicker (if tiled)

Convert to binary if needed (black/white) before vectorizing

Vectorization

Use one of:

Option 1: RasterToVectorCoercer

• Best for:
  • Simple shapes
  • Boundaries
• Outputs:
  • Polygons or lines

Option 2: RasterToPolygonCoercer

• Good for:
  • Classified rasters
  • Land-use maps

Clean the Vector Output

After conversion:

• Generalizer → simplify geometry
• AreaFilter → remove noise/small polygons
• TopologyBuilder → fix connectivity
• LineMerger → join broken lines

Optional: Extract Labels (OCR)

If your PDF contains text labels:

• Use:
  • RasterTextExtractor (OCR-based)
• Or if vector PDF:
  • Text comes directly via PDF reader

Write Output

This is a quick overview.

Cheers

SRG