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After creating a subcatchment polygon, there is a case where the polygon needs to be divided due to reasons such as creating a new road. In InfoWorks CS, there was a tool to divide polygons with line data, but it disappeared in ICM. Without the tool, I have to divide subcatchments in GIS software and re-import them to ICM, and it is quite time-consuming. It would be appreciated if the feature is added to ICM.
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You can also divide the polygons using Ruby, but it is not very straightforward. It would be cool to add this to ICM, as it keeps ICM as a singular integrated tool!
There is still a tool in ICM to split polygon objects, under "Model > Geometry > Crop selected overlapping objects...". (https://help.autodesk.com/view/IWICMS/2024/ENU/?guid=GUID-308E01FD-E942-4C96-B995-EBB0A5292B1F). It can be a little bit clunky to use, but I find it works well enough, and is much faster than exporting then re-importing from external GIS software. You need the object you want to crop against in the model, so sometimes this requires manually creating a temporary "general line" object in the model, using this for the crop operation, then deleting the line object out afterwards. Also note the line object needs to extend beyond the boundary of the polygon object to be cropped - sometimes if you snap the line object to the vertices of the polygon object, the crop will fail, as ICM won't recognise the line and the polygon as properly overlapping.