Align feature does not work for country boundaries

Question

Using ArcGIS Pro and ArcPy (https://pro.arcgis.com/en/pro-app/latest/tool-reference/editing/align-features.htm), I was trying to align the Canada border to the USA border, but the tool does not work.

- downloaded the shapefiles of countries from https://hub.arcgis.com/datasets/2b93b06dc0dc4e809d3c8db5cb96ba69_0/explore?location=-2.688200%2C0.000000%2C2.00

- simplify the Canada shapefile by using mapshaper, so the borders between Canada and USA have small gaps: mapshaper ca.shp -simplify 30% keep-shapes -o ca_30.shp

- arcpy.edit.AlignFeatures("ca_30.shp", "us.shp", "0.00005 Decimal Degrees") # I also tried a lot of other search distance

- opened ArcGIS Pro and opened the "Align feature" tool and tried a lot of different search distances

- The results are either wired Canada borders or the gaps are still there

Attached are the shapefiles

ca_us_backup.zip

tonybestpro · Answer

Eventually, two solutions work for me:

https://gis.stackexchange.com/questions/403846/postgis-align-borders-of-countries/404080#404080

DanLee · Answer

Thank you for reporting this problem. Sorry for the inconvenience it may have caused. We have logged a bug and will try to fix it soon.  You can also submit a Tech Support issue; that way you will be able to check the bug fixing status.

tonybestpro · Answer

@DanLee Wow, it works for the above ESRI data after converting to single-part. However, it does not work for my another similar US/CA data, which is attached. Any idea?

Screenshot before align:

Screenshot after align:

usa_can_single_back.zip