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76 views

St_OffSetCurve with self-crossing lines

I have about 50,000 linestrings in PostGIS. They represent routes along roads. But I want them to be (roughly) pavements (aka sidewalks) instead. So I need to move all the lines 3 metres to the left ...
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30 views

How to select the longest vector in a couple of parallel polylines?

I work with ArcGis 10.2. I need to find the longest vector in a couple of parallel vectors. They are extracted from an Intersect of Streets buffer and a flooding limit. So I have sometimes only one ...
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70 views

Creating Parallel Road Lines

I am aware of the "Copy Parallels" option from the editing toolbar. It works fine when I'm dealing with 1000 roads or so, but when I need to create parallels for 300,000 roads it takes a long time, as ...
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92 views

copy parallel error (the features couldn't be copied)

I have a problem with copy parallel. it gives me an error saying "the features couldn't be copied". I already have the new feature layer. The thing is when i select very few lines for example 2 or 3 ...