Find the points on a polygon that are perpendicular to a line as in the screenshot.
Existing features are the polygon(s) and line A.
Pts a and b are required.
Thanks very much for any help and ideas.
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Have done something like this in the past, where I wanted to determine the start and end positions of road barriers along roads, using measures. I think you can use that technique for this case, given that there are vertices on point a and point b.
Steps would be:
- Generate a distance measure for line A using the MeasureGenerator.
- Explode the polygon to vertices using a Chopper. If not enough points, you can use a Densifier.
- Find the closest line A for each polygon point. The measure from the line will be added to the MatchedBase.
- Expose the measure from the point using a MeasureExtractor.
- Find the min and max measure.
Have done something like this in the past, where I wanted to determine the start and end positions of road barriers along roads, using measures. I think you can use that technique for this case, given that there are vertices on point a and point b.
Steps would be:
- Generate a distance measure for line A using the MeasureGenerator.
- Explode the polygon to vertices using a Chopper. If not enough points, you can use a Densifier.
- Find the closest line A for each polygon point. The measure from the line will be added to the MatchedBase.
- Expose the measure from the point using a MeasureExtractor.
- Find the min and max measure.
Workspace demonstrating this.
Have done something like this in the past, where I wanted to determine the start and end positions of road barriers along roads, using measures. I think you can use that technique for this case, given that there are vertices on point a and point b.
Steps would be:
- Generate a distance measure for line A using the MeasureGenerator.
- Explode the polygon to vertices using a Chopper. If not enough points, you can use a Densifier.
- Find the closest line A for each polygon point. The measure from the line will be added to the MatchedBase.
- Expose the measure from the point using a MeasureExtractor.
- Find the min and max measure.
Hi, Thanks for your reply. I'll have a look at the workspace and methodology you recommend and let you know how it goes.
Z.