knime-shapefiles-as-WKT
Demo: merge shapefiles in KNIME
Download the workflow here, then import it into KNIME using File/Import KNIME Workflow.
This workflow demonstrates how, when data was loaded from geometries inside KNIME, it can then me merged, joined or concatenated using the standard nodes.
Here we had loaded lines for secondary road and trails; we merge both using the standard “Concatenate” node. We apply the same process for the geometries of residential and industrial buildings.
Things to try
- Run the workflow
- Observe the outputs of the nodes
Note: we can merge different types of geometries within KNIME (for instance, concatenate tables containing geometries and lines), because KNIME only considers these values as String values. However most of the Spatial nodes might refuse input data which mixes geometry types.
Go beyond
- Add a node “Write Geometries into Shapefile” and write the result of the concatenation into a shapefile. Open it with a GIS sofware like qgis, and check the data is still there.
Next
See the demo to reproject geometries. Or come back to the documentation.