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spatial-data-lab / knime-geospatial-extension

This repository is built for KNIME-CGA Geospatial Project, and the goal is to build Python-based nodes for geospatial analysis in KNIME Analytic Platform.
MIT License
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Nearest Join Node Add Exclusive Option from sjoin_nearest #307

Closed rrousselot closed 8 months ago

rrousselot commented 1 year ago

I am having issues using the Nearest Join node because it only returns 1 item. I am searching for proximity to nearest point that is not the current point I am at. As it works now if the same point is in the dataset, you get a zero-distance returned and the record for the same point you are searching with. I need the nearest point that is not the current point. I think this can be solved by exposing the GeoPandas sjoin_nearest  parameter exclusive to the nodes settings. I believe this is currently always set to false. Please make it possible to set this parameter in the Nearest Join node settings.

https://geopandas.org/en/stable/docs/reference/api/geopandas.GeoDataFrame.sjoin_nearest.html#geopandas.GeoDataFrame.sjoin_nearest

exclusive bool, optional, default False If True, the nearest geometries that are equal to the input geometry will not be returned, default False. Requires Shapely >= 2.0

koettert commented 1 year ago

@UrbanGISer can you please check if this option solves the problem. If this is the case we could expose it with the next release as advanced setting.

rrousselot commented 1 year ago

FWIW I used a Python Script node to set the exclusive to True in sjoin_nearest and it worked the way I needed it to.

koettert commented 1 year ago

Perfect, thanks for the info @rrousselot . Will add the ticket to the next release