writing out to .shp file

KNIME Extensions
1

Hi
A brand new user of Knime here! Am a user if FME currently but want to see if an Open Source equivalent is as good.
So, I have downloaded the MIT Geospatial nodes Group and have set up a basic workspace with a .shp reader reading a small point .shp file. Executing the node is successful with a ‘Geom’ column generated (in British National Grid EPSG 27700)

When i try to write out to .shp but in a different folder location, the operation fails at 42%l; the log file states;

ERROR GeoFile Writer 3:2 Execute failed: Could not set CRS: EPSG:27700

The source file is in EPSG: 27700 so i’m confused as to why it is failing on this?
I’ve tried adding a ‘Projection’ node and setting the conversion explicitly in that but still get the same error message

Apologies if this is formatted incorrectly. Hopefully people will still understand it and be able to provide some assistance

Simon

2

Hi,

could you provide an example workflow? I’m not very familiar with geospacial analysis therefor it’s hard to follow.

Andreas

3

Hi @schume,

Welcome to the forum!

I just tested reading and writing a .shp file in British National Grid (EPSG:27700) to a different folder, and it worked as expected for me (example).

Could you share an example workflow as asked above to understand the issue you are facing.

Best,
Keerthan

4

@ActionAndi & @k10shetty1
thanks for your replies
this is the simple workspace for this process.
For the Geo File Reader;

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For the Geo File Writer

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The source file is in British National Grid projection (|EPSG:27700) as is the output file

When i configured the Output file path in the Writer, i had to manually type the location in; clicking the yellow location icon to the right doesn’t seem to allow me to select the output location and add the file name.

Hopefully this reply has worked and you can see the screenshots of the workspace!

thanks

5

Hi @schume,

Can you please upload the workflow to KNIME hub with the data available in the workflow data area? It would be easy to just downlaod and see what is going on in the workflow.

In this example, i have saved the files in the workflow data area and using a variable to access it. Or just share the dataset that you are using here.

Best,
Keerthan

6

I’ve uploaded the workspace (test_shp_file) to my Public folder in my schume account

I think the source .shp file is included

Can you see it, download it and is everything there?

7

Hi @schume,

I am not able to reproduce the issue. I am able to save the file to another folder in my local system. Can you share details on your OS adn the version of KNIME AP you are uisng?

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Best,
Keerthan

8

Hi @k10shetty1
i’m on Windows 11 24H2 (build 26100.4652)
Knime V5.5.0
the GeoSpatial Analytics extension is 2.0.0.202507030816

I saved the source file over to the c:\temp folder (using QGIS) and then wrote it back into c:\temp as test1.shp and also to my e:\ root and it failed both times at 42%

I’ve checked the permissions on both drive and i can read and write into both.

thanks for your help in this