Hello, I thought I should give an update on what I have been doing with the shoreline for Lake Huron.
In May I updated part of the Bruce Peninsula to get a feel for how to do the workflow. The goal was to replace the PGS shoreline with the one from canvec. When it finally got rendered it looked great, so I then worked SW towards Sarnia, eventually getting almost to Lake St. Clair. It got a bit tricky there due to the way some large islands are currently entered so I decided to go back and continue E along the Bruce. Maybe I should have continued towards Windsor as it is much easier than what I have started to tackle. Eastern Georgian Bay has a huge number of islands (I hope the other lakes have a simpler shoreline). By itself this isn't a big deal but a large portion of them have been entered as a monstrous ~760 member multipolygon. Additionally, the inner ways are islands in a large lake, which is not how it should be done. There is also a PGS based coastline. Somehow the renderer has made sense of this and renders something that sort of works (I imagine the code for generating a coastline is very creative). I have started untangling the multipolygon, making the islands coastline. At the same time, the PGS coastline is being replaced with the one from canvec. This is slow work and I have 'only' done about 200 islands so far. It is slowed even more by the desire to have each change set leave everything in a consistent state (ripping everything out in a few change sets and then adding everything back would be much faster). When done, the multipolygon containing all the islands will be empty and will be deleted. The end result should be a much nicer shoreline and a dataset that will be much easier to modify. Don't expect this work to be done until sometime in July. The scary part is that when finished less than 1/4 of one Great Lake shoreline will be done. After that, I'll see if I have the time/energy to continue working up towards the French River (a nice place for canoeing!). -- James (Jay) Treacy [email protected] _______________________________________________ Talk-ca mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-ca
