Question

Spatial Join: one to one

T

Hi,

there are lots of qstns about one to many joins.

I want to understand what transformer to use to achieve a one to one spatial join based on geometry?

I have a line in GIS that I want to analyse to see if there a geometry join to a line in CAD. This works fine with the SpatialFilter if there is only one line.

however when GIS and CAD has two lines in close proximity the SpatialFilter is creating a many to one join by joining the Two GIS lines to the same CAD line.

How do I create the one to one join please?

thanks in advance

2 replies

nielsgerrits
Rank
Userlevel 6
Badge +32

Do you want to check if two lines from different sources are the same? One way to do this is to use the Matcher transformer.

 

The ChangeDetector is probably a more intuitive way to do this.

M
Badge +2

@tammydovey​ Did you try SpatialRelator. This will give you a list of all the lines that touch. There's a article on Spatial Joins that give the options for joining spatial data and also a nice webinar

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