Re: [talk-au] Boundary questions.
Hi Liz, Looks ok to my untrained eye so-far: http://www.openstreetmap.org/?lat=-34.6257lon=146.3141zoom=14layers=B000F TF Nice work! Cheers, Ben. -Original Message- From: talk-au-boun...@openstreetmap.org [mailto:talk-au-boun...@openstreetmap.org] On Behalf Of Liz Sent: Sunday, 12 April 2009 9:16 PM To: talk-au@openstreetmap.org Subject: Re: [talk-au] Boundary questions. On Wed, 4 Mar 2009, Nick Hocking wrote: 2) If a suburb follows a road or river should part of the boundary way be deleted and replaced with that part of the road or river. 3) How can we determine if a boundary follows the centre of the road/river or maybe one or other sides of it. I've just been replacing big hunks of Murrumbidgee River with the imported boundaries In the first place most of the Murrumbidgee was imported by vmap, which didn't do a great job with regard to the twists and turns of the river. Some has been handdrawn, and some of that was no better, depending on how tired I was at the time. So where the ABS boundaries show a great improvement (eg the river goes under the bridges and lines up with landsat images, I've now used those for the Bidgee along a section - mostly Narrandera to Darlington Point. I need to know if this doesn't work when it gets to the renderer, and if so what we could do about it. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] Boundary questions.
On Wed, 4 Mar 2009, Nick Hocking wrote: 2) If a suburb follows a road or river should part of the boundary way be deleted and replaced with that part of the road or river. 3) How can we determine if a boundary follows the centre of the road/river or maybe one or other sides of it. I've just been replacing big hunks of Murrumbidgee River with the imported boundaries In the first place most of the Murrumbidgee was imported by vmap, which didn't do a great job with regard to the twists and turns of the river. Some has been handdrawn, and some of that was no better, depending on how tired I was at the time. So where the ABS boundaries show a great improvement (eg the river goes under the bridges and lines up with landsat images, I've now used those for the Bidgee along a section - mostly Narrandera to Darlington Point. I need to know if this doesn't work when it gets to the renderer, and if so what we could do about it. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] Boundary questions.
While we are thinking about alignment etc, I have found another case we should consider. In some areas the ABS data does not line up with the existing coastline which has come from yahoo or landsat., e.g * Yowie Bay in sydney which I assume comes from Yahoo * The Whitsunday islands that I assume comes from landsat Once the upload is done I am inclined align the the existing Whitsunday Islands to the new suburb boundary. But what about the the yahoo based coastline - case by case based on gps traces if available ? what about if we have no traces ? cheers -- Franc ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] Boundary questions.
Agreed, it's not as simple as I was hoping ;-( cheers On Thu, Mar 5, 2009 at 11:01 AM, Ross Scanlon i...@4x4falcon.com wrote: In some areas the ABS data does not line up with the existing coastline which has come from yahoo or landsat., e.g * Yowie Bay in sydney which I assume comes from Yahoo * The Whitsunday islands that I assume comes from landsat Once the upload is done I am inclined align the the existing Whitsunday Islands to the new suburb boundary. But what about the the yahoo based coastline - case by case based on gps traces if available ? what about if we have no traces ? * Yowie Bay in sydney which I assume comes from Yahoo * The Whitsunday islands that I assume comes from landsat Once the upload is done I am inclined align the the existing Whitsunday Islands to the new suburb boundary. The Whitsunday islands are PGS data. Some sections have been aligned to Yahoo but not all. I'd be carefull about aligning to the ABS data without looking at Yahoo or some other sat image. The ABS data cuts across the mouth of some bays and inlets and also extends too far up some of the inlets. Have a look at Whitsunday Island with Yahoo imagery as the background. Part of Cid Harbour (western side) is cut off and Hill Inlet extends all the way up the inlet which probably should be marked as a river. Also have a look at the area of Hamilton Island airport as the ABS data cuts across the runway and follows the original coastline. So this data has obviously not been updated since 1984 when the runway was built. -- Cheers Ross ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au -- Franc ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
