[OSM-newbies] coastline, nyc

[David Groom]

  ----- Original Message ----- 
  From: Eric Brelsford 
  To: newbies at openstreetmap.org 
  Sent: Monday, January 07, 2008 3:14 PM
  Subject: [OSM-newbies] coastline, nyc


  I've seen some chatter about using scripts to upload coastline data.  Is this still the preferred method, or is it okay to trace sat imagery?  I'd like to fix the coast around my home:

  http://www.openstreetmap.org/?lat=40.6789&lon=-73.9664&zoom=13&layers=0BFT

  as it's a little annoying being under water in osmarender.

  Any tips?



In the above area I'd trace directly from the Yahoo imagery.  The PGS import script would generate a coastline, but it would need a lot of tidying up to get the jetties and wharfs correctly shown as nice straight lines, with angular corners.

Be aware that some of the area does already seem to be have an OSM coastline, check at:

 http://tile.openstreetmap.nl/coastlines.html?lat=40.6789&lon=-73.9664&zoom=13

When tracing remember that the water needs to be on the right of the way, and that  a coastline needs to be a complete series of ways ( so if at some stage when going up one side of a river you decide to stop and go back down the other side then the coastline needs to be "closed" with the two sides if the river joined.  (hope this makes sense - it reads badly to me ).

David
  

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