In reply to alvin.
Hi alvin, you’ll need to wait till the final perimeter plan for the new ACS (P) is out as that will then determine the <1km and <2km zone for home-school distance. You’ll also need for this to be updated on OneMap’s SchoolQuery (which demarcates the <1km and <2km zones).
This is because the new home-school distance rule is based on the perimeter of the primary school, not its centre (https://www.99.co/singapore/insider/home-school-distance-new-rule-greater-competition-some-neighbourhoods/).
For the purpose of this article, the current red circle is just an approximation. Hope this helps!