Hi, We have a river polygon of several miles labeled as riverbank, yet the polygon and river linear data were obviously obtained from USGS NHD which is over 40 years old and not even close to where the river currently exist. A river linear is appropriate and easy enough to digitize using the aerial imagery. My goal is to delete the polygon and then edit/re-digitize the river.

When I select the river polygon and try to delete it, I receive the message the entire selected polygon is not visible and cannot be deleted. How do I cut the polygon to be within the visible editing range and/or cut the river polygon into editable sizes so I can correct this. Thanks for your help.

Bob812Many

asked 28 Jun '18, 17:26

bob82many's gravatar image

bob82many
26114
accept rate: 0%


This sounds like you are trying to do this in iD, which given the size of the object is not a good idea.

I would typically recommend using JOSM for such work (this is not in the context of editor wars, if an object is so large that it can't be viewed in editing mode in iD it is simply a practical concern), which should have the added advantage of allowing you to modify the existing geometries easy and fast enough that wholesale deletion is not necessary (if possible we always try to preserve an objects history, naturally if it is an untouched import there is little to be gained from that).

permanent link

answered 28 Jun '18, 20:27

SimonPoole's gravatar image

SimonPoole ♦
37.1k13279591
accept rate: 19%

edited 28 Jun '18, 20:29

A simple short term solution without using JOSM would be to retag the riverbank polygon by prefixing the waterway value, for instance disused:waterway=riverbank or similar (see Lifecycle prefix, although most are for man made features, the concept is fine). Perhaps add a fixme too.

You can then draw the river centre line (or perhaps preferably the flowline or thalweg) in its current position (or as current as aerial imagery allows).

The net effect is that the old polygon will no longer be rendered and the new centre line will show up. The polygon can then be cleaned up at your leisure.

permanent link

answered 29 Jun '18, 13:30

SK53's gravatar image

SK53 ♦
21.5k44221338
accept rate: 20%

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×67
×61
×23
×11

question asked: 28 Jun '18, 17:26

question was seen: 583 times

last updated: 29 Jun '18, 13:30

powered by OSQA