[925] GDA2020_MGA and change the spatial reference in ArcGIS Pro

ZONE50: 114.0 120.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_50")
ZONE51: 120.0 126.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_51")
ZONE52: 126.0 132.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_52")
ZONE53: 132.0 138.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_53")
ZONE54: 138.0 144.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_54")
ZONE55: 144.0 150.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_55")
ZONE56: 150.0 156.0 - arcpy.mp.spatialReference("GDA2020_MGA_Zone_56")

---

import arcpy
 
# Set the path to your ArcGIS Pro project file (.aprx)
project_path = r'C:\Path\To\Your\Project.aprx'
 
# Load the project
aprx = arcpy.mp.ArcGISProject(project_path)
 
# Specify the map that you want to change the spatial reference for (by its index)
map_index = 0  # Replace with the index of your map
map_obj = aprx.listMaps()[map_index]
 
# Specify the new spatial reference using a well-known ID (WKID)
# You can find WKIDs for various spatial references in ArcGIS documentation
new_spatial_reference_wkid = 4326  # For example, WGS 1984
 
# Change the map's spatial reference
map_obj.spatialReference = arcpy.SpatialReference(new_spatial_reference_wkid)
 
# Save the changes to the project
aprx.save()
 
# Clean up
del aprx

another one

aprx.listMaps()[0].spatialReference = arcpy.SpatialReference("GDA2020_MGA_Zone_55")
aprx.listMaps()[0].spatialReference