Hi everyone,
I am currently comparing lines in database A and database B, and I want to categorize them based on distance from each other:
If line A < 10cm line B → class 1
If line A 10 - 30cm line B → class 2
If line A < 30cm line B → class 3
I thought I'd do this using the Clipper transformer: if part of line A is within 10cm of line B, and another part of line A is 12cm from line B, I want line A to be split. See my workflow below:
I have my Clippers grouped by ‘type’ and ‘level’, so drailroads on level 1] are compared to ]railroads on level 1] and sroad lines on level 2] are compared to ]road lines on level 2].
I have Overlapping Clippers set to ‘Clip Interim Results’ and I am generating a list of IDs from line B on line A.
This is the situation im currently facing:
Database A in red, database B in black and a 10cm buffer around database B in grey. The darker grey area is where the two database B buffers overlap.
In the situation above I want to compare ID_A = 1 to ID_B = 1, but ID_B = 2 also crosses ID_A = 1, resulting in my problem. Line A will be clipped into three parts:
| ID_A | list{0}.ID_B | list{1}.ID_B |
| 1 | 1 | <missing> |
| 1 | 1 | 2 |
| 1 | 1 | <missing> |
In the example above I could just take list{0}.ID_B and drop list{1}. But how can I be sure that, ID_B = 1 is in list{0}.ID_B, and not in list{1}.ID_B?
Are there other methods that would work for my project? Am I not reading some very important Clipper documentation? I am using FME 2023.2
Kind regards and thanks in advance!
Joep