Oi Arlindo, Me parece que a versão oficial das fronteiras é a disponibilizada pelo LNCC (http://info.lncc.br), então eu recomendo comparar com essa fonte de dados. O LNCC tem outras coisas interessantes, como a posição dos marcos de fronteira (boundary stones), que também podem ser importados no OSM (mais a título de curiosidade).
Uma das vantagens do LNCC é a descrição textual da fronteira, que permitiria dar nomes a vários elementos geográficos usados para referência (como rios, morros, estradas, lagos, ilhas, etc.). On Tue, Jun 18, 2013 at 5:21 PM, Arlindo Pereira <openstreet...@arlindopereira.com> wrote: > Se alguém quiser trabalhar na importação de fronteiras internacionais, um > órgão governamental dos EUA liberou um arquivo em domínio público com > precisão supostamente maior que o que temos atualmente no OSM. > > []s > Arlindo Pereira > > ---------- Forwarded message ---------- > From: Mikel Maron <mikel_ma...@yahoo.com> > Date: Sun, Jun 16, 2013 at 10:09 AM > Subject: [OSM-talk] Fw: Updated, more detailed international bdy. shapefiles > (US Dept. of State Office of the Geographer) > To: "t...@openstreetmap.org" <t...@openstreetmap.org> > > > Of interest to those of us working on boundaries. Some recent updates > geographers at US State. > -Mikel > > * Mikel Maron * +14152835207 @mikel s:mikelmaron > > ----- Forwarded Message ----- > Sent: Friday, June 7, 2013 5:10 PM > Subject: Updated, more detailed international bdy. shapefiles (US Dept. of > State Office of the Geographer) > > All, > > I have you all on my list of folks interested in detailed international > boundary lines.* > > An update to our worldwide Large Scale International Boundaries (LSIB > version 5) can be found as of today at http://HIU.state.gov (under “data”, > down near the bottom (“June 2013 LSIB v. 5”, 17mb.)) This data set is in > the public domain; no restrictions on its use. It includes update such as > an approximation of last month’s ICJ ruling on Burkina Faso-Niger’s > boundary. > > Also, after many requests, Kate Schaefer (in our sister “HIU” branch) > and I put together last fall a worldwide country polygon file as well, which > most closely matches the Sept. 2012 version (LSIB4b) of our international > lines. It is posted in the same place. > > We’re fortunate in this office (intact here at DoS since 1921) to have > or have easy access to voluminous maps, treaties, and other international > boundary information from the past 150 years. We are also fortunate that > our colleagues in DoD (NGA) and in the UK (DGC) have been researching and > digitizing international boundaries since the late 1990’s; we continue to > work closely today. That’s given us a pretty good head start on quality > control for the world’s 320-some international land boundaries. > > Considering the caveats in the attached doc (i.e., we follow US govt. > policies; certainly anyone else using this data set can change it to conform > to their own policies), we always welcome from professional geographers like > yourselves any corrections, suggestions, questions on international land > (not maritime!) boundaries, their history, alignments, lengths, etc. > > all the best, > Dave > > *if that’s not or no longer the case, let me know > > > > > > _______________________________________________ > talk mailing list > t...@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > > > > _______________________________________________ > Talk-br mailing list > Talk-br@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-br > -- Fernando Trebien +55 (51) 9962-5409 "The speed of computer chips doubles every 18 months." (Moore's law) "The speed of software halves every 18 months." (Gates' law) _______________________________________________ Talk-br mailing list Talk-br@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-br
