Hello! I used Clipper to divide the lines with the areas. In some places as a result of "outside" I got lines consisting of two elements.
How can I remove parts of lines that do not get red line? I used Chopper to separate the lines and then I wanted to filter the data through Spatial Filter (by "filter intersects candidate" where Filter is a red line) but it doesn't take into account Chopper's separation..
Thanks for your help
Best answer by gio
Hi @tramm
Your input data seem topologically not healthy.
Clipper totally fails. as does the spatialfilter. Indeed objects mysteriously disappear.
1 LineOnAreaOverlayer.Tester for overlaps>0
2 Create a area (drop hole) with 22344 and 22345.
3 Geometrycoerce those 2, because they are lines but have fme_type polygon.
4 Use these as anchor in a AnchoSnapper with the lines from step 1 as candidates. I uses 0.1 as tolerance (0.2 is too much)
5 Output from anchorsnapper to Spatialrelator (anchors as suppliers)
6 listelementcount on SpatialRelator output.
Test _element_count > 1
result:
I uploaded the workbench.
+50So if I read you correctly you want to remove the circled lines and they're aggregated with their corresponding parts on the other side of the clipper feature. Deaggregating them (with a Deaggregator) and then your SpatialFilter should do the trick.
+50So if I read you correctly you want to remove the circled lines and they're aggregated with their corresponding parts on the other side of the clipper feature. Deaggregating them (with a Deaggregator) and then your SpatialFilter should do the trick.
So if I read you correctly you want to remove the circled lines and they're aggregated with their corresponding parts on the other side of the clipper feature. Deaggregating them (with a Deaggregator) and then your SpatialFilter should do the trick.
by the way: short lines were created using 2DVectorCalculator
+50
by the way: short lines were created using 2DVectorCalculator
Can you share a small sample dataset? Clipper, Clippee and Filter features.
+15@tramm
When you use the filter predicate "intersects", touching lines will be selected as well.
A way to filter those out is to use a spatialrelator instead of a spatialfilter.
Activate the option "calculate cardinality" (spatial filter does not offer this option)
List concatenate, without a separator, the attribute "relationships{}.card_line". If the result is 0, then there is just a touching relationship. You can filter those out using a tester.
"relationships_card_line" is created by the spatialrelator.
(Also you could consider using a LineOnAreaOverlayer instead of a clipper. Then testing for overlaps >0 would possibly suffice)
@redgeographics i tried "Filter Touches Candidate" and it doesn't work too. Some of Clipee have been "eaten" by SpatialFilter translator...I would like to receive only this part of Clippee lines that begin on the Filter(becouse Filter-lines were created by 2DVectorCalculator with Filter)
Outside Clippee:
that's my data:
I used GeometryCoercer to turn areas into lines
@tramm
When you use the filter predicate "intersects", touching lines will be selected as well.
A way to filter those out is to use a spatialrelator instead of a spatialfilter.
Activate the option "calculate cardinality" (spatial filter does not offer this option)
List concatenate, without a separator, the attribute "relationships{}.card_line". If the result is 0, then there is just a touching relationship. You can filter those out using a tester.
"relationships_card_line" is created by the spatialrelator.
(Also you could consider using a LineOnAreaOverlayer instead of a clipper. Then testing for overlaps >0 would possibly suffice)
+15Hi @tramm
Your input data seem topologically not healthy.
Clipper totally fails. as does the spatialfilter. Indeed objects mysteriously disappear.
1 LineOnAreaOverlayer.Tester for overlaps>0
2 Create a area (drop hole) with 22344 and 22345.
3 Geometrycoerce those 2, because they are lines but have fme_type polygon.
4 Use these as anchor in a AnchoSnapper with the lines from step 1 as candidates. I uses 0.1 as tolerance (0.2 is too much)
5 Output from anchorsnapper to Spatialrelator (anchors as suppliers)
6 listelementcount on SpatialRelator output.
Test _element_count > 1
result:
I uploaded the workbench.
+15Hi @tramm
Your input data seem topologically not healthy.
Clipper totally fails. as does the spatialfilter. Indeed objects mysteriously disappear.
1 LineOnAreaOverlayer.Tester for overlaps>0
2 Create a area (drop hole) with 22344 and 22345.
3 Geometrycoerce those 2, because they are lines but have fme_type polygon.
4 Use these as anchor in a AnchoSnapper with the lines from step 1 as candidates. I uses 0.1 as tolerance (0.2 is too much)
5 Output from anchorsnapper to Spatialrelator (anchors as suppliers)
6 listelementcount on SpatialRelator output.
Test _element_count > 1
result:
I uploaded the workbench.
btw, using cardinality on the spatialrelator yields the same result in this case. But only after snapping.
Without snapping almost all interior lines fail.
btw, using cardinality on the spatialrelator yields the same result in this case. But only after snapping.
Without snapping almost all interior lines fail.
Clippee should be placed at regular intervals on each section between vertexes of Filter area.
+15@tramm
It is not die to filtering that incorrect ones are filtered or not.
It is due to the prior process that creates the lines. Most do not intersect with the border of the polygon (that is why is snapped at 0.1).
The ones that are unwantedly filtered only (segment) snap at 0.2 or higher. Segmentnapping at 0.2 creates new problems.
You need to do something about your previous process (which I don't know).
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