Allocating duplicate points and duplicate polygons

Do the polygons have identical geometries? If so, I'd put them through the matcher to compare the geometries (unless you have some other way of identifying they are the same) followed by a counter with a group by of the "match_id". Then I'd use a spatial relator and build a list on each polygon of the point references that fall within it. Finally an attributecreator or a ListIndexer to use the count value to access the reference stored in one of the list elements.

Hi

the geometries of the polygons are exactly the same

I've just reconstructed your workspace, but it hasn't worked but i don't know why, so will have a look at it tomorrow

One question re the SpatialRelator. How do i set the 'Group by Mode'to Process at End (Blocking)?

thanks

Simon Hume

@simonhume​  is it always a pair of points and pair of polygons, or sometime one point and on polygon and another three of each?

@Mark Stoakes​  - No,it could be more, but it's always going to be a minimum of 2. It's actually Flats information, so the Polygon represents the Building and the Point contains the Address and other details. The Point has a unique reference, the UPRN, whilst the Polygon has a randomly generated id. I've received the data from a colleague and am trying to make it more useable before colleague have access to it.

The workflow I suggested presumes that if there are 2 points inside the building polygon, there are always 2 building polygons, 3 points inside, 3 polygons etc.

@simonhume​  It seems that you could safely drop the duplicate polygons and then just match the addresses to the same polygon - unless there is a rule or criteria that you can use to choose a specific polygon to match an address, like the floor number or something

If I'm reading correctly, each polygon has it's own reference and one point must be matched to one polygon, and the other point must be match to the other polygon (but which way round it is does not matter, i.e. point 1 can match to polygon A and point 2 can match to polygon B, or point 1 can match to polygon B and point 2 can match to polygon A, but point 1 and point 2 cannot both match to polygon A)

@ebygomm​  - yes, that's it in a nutshell, apologies if it wasn't clear in my initial post of this enquiry.

The Polygon records are very basic, the important information is contained in the point dataset (address, UPRN etc). Therefore it doesn't matter which polygon is matched to which point.