Concerning, mapshaper.org, when I tried to upload a shpfile from my Firefox or Safari on my OS X 10.5.5 it just hangs there at the screen where it reports it uploaded 100% and then just sits there even overnight.
On Dec 9, 10:56 pm, "Michael Geary" <[EMAIL PROTECTED]> wrote: > Thanks for the tip, John - that sounds like a good one. > > Do you know if it takes care of the common border problem? That is, if you > have a shapefile for, say, the 48 contiguous states, does it make sure that > common borders follow the same path for each polygon? A while back I tried a > standalone D-P algorithm written in Python, but it simplified each polygon > independently from the rest, so common borders ended up with all sorts of > gaps and overlaps. Not good at all. > > Here's a program that does claim to handle this correctly and also uses > PostGIS. I haven't tried it out, though - no idea how it compares with the > built-in D-P code that you mentioned: > > http://www.cartoweb.org/downloads/vertexsimplification/documentation.... > > Also, for the OP,www.mapshaper.orgseems to be back up now. It's a nice way > to do this interactively in just a few minutes, and it does handle common > borders well. > > -Mike > > > From: maps.huge.info [Maps API Guru] > > > I would suggest loading Postgresql 8.3.5 and PostGIS 1.3.3 on > > your system, load in the shapefile and use the built in D-P > > functions to do the task. There's a new function just added > > to 1.3.3 called "ST_SimplifyPreserveTopology" that prevents > > splinters and invalid polygons being formed by the D-P > > process. Very cool! It's free to use and runs under virtually > > any OS. To import a shapefile, use the shp2pgsql function and > > to create shapefile from the database use pgsql2shp. > > > -John Coryat > > >http://maps.huge.info > > >http://www.usnaviguide.com --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Maps-API?hl=en -~----------~----~----~----~------~----~------~--~---
