Hi Peter, Thanks for your detailed response. One thing we decided since my original query was to move the YANG geo-location type out of the ietf-routing-types.yang model since we thought that we didn’t have enough review and experience to model it correctly. We are going to put it in a separate YANG model and, based on your response, there may be more than one YANG type.
We will be discussing this in the future. Thanks, Acee On 8/23/17, 10:40 AM, "Peter Lothberg" <[email protected]> wrote: >Acee, > >I missed this message as it was just text encoded, no attachments, my >obsolete mail ui can't handle it... > >>Hi Peter, >> >>We wanted to assure that milliseconds of latitude/longitude offer >>enough granularity for your applications. This slightly more than 3 >>cm granularity for latitude and slightly less the 3 cm granularity >>for longitude. >> >>Thanks, >>Acee > >We have Geo coordinates to form a graph over the network, from cables >and ducts in the ground to the wiring inside a CO/POP/Datacenter. > >As Vint Cerf says we need to bring IPv6 to the planet as soon as >March, what we need to future proof this is a format that allows for >the following; > >([Galaxy,Solar System,Planet],)* [Operator], [World], [Lat, Long, >Height], [Time of Observation UTC in MJD with decimals] > > (MJD - Modified Julia Date) > (Operator is the originator/maintainer of the data.) > >The proposal is a good start but you lack some important things; > > - You need to be ale to express arbitrary resolution for Lat/Long. > > Depending on the use, you might want to truncate the resolution to > not reveal the exact location of infrastructure, and then again you > may want to express exactly where things are. > > You need to be able to express what we can measure for lat/long > as an example, so you have to be able to represent this in your > format: > > LAT 59.317647949 North > LON 18.023390835 East > >- When it comes to height, we really have a problem; > > - Different countries have different ways of measuring the "sea > level". > - The sea level are rising > - The land is also rising, like our Stockholm location is moving > about 11mm up and 7mm NE in average every year, so you need to > have a date on the observation of the position. > - The local observations have different ages > - GPS presented height is done with a theoretical model of the earth > and calculated based on the distance from the GPS satellite. > > (Neighboring countries in some cases have more than 100cm > difference in their definition of sea level.) > >Height is a signed value, 1mm resolution, with a source identifier >(you need way to add new identifiers for the future); > - WGS84 > - Local official survey > - Local height (maybe from basement of building) > - Local sequence number > >- In some cases you want to describe something other than the natural >world > itself. e.g., a VPN described as a flat plane, or military / private > tectical graph that is a different "plane" / "overlay" etc. > > So we ended up with a Integer that represents the "world" you are > describing and the vale of 0 represent the natural world we all live in > and have as a common reference. > >(*) - The astronomers refers to planets in our solar system with a >coordinate system with the sun as 0,0,0. Everything moves, continental >drift to ephemerides of planets and satellites. I chose to leave those >models out of scope as there is enough data in the proposed format to >go to other sources and augment the positions. > > >-Peter > > > >> --_000_D576E8B0B65A3aceeciscocom_ >> Content-Type: text/plain; charset="utf-8" >> Content-Transfer-Encoding: base64 >> >> >>SGkgUGV0ZXIsDQoNCldlIHdhbnRlZCB0byBhc3N1cmUgdGhhdCBtaWxsaXNlY29uZHMgb2Ygb >>GF0 >> >>aXR1ZGUvbG9uZ2l0dWRlIG9mZmVyIGVub3VnaCBncmFudWxhcml0eSBmb3IgeW91ciBhcHBsa >>WNh >> >>dGlvbnMuIFRoaXMgc2xpZ2h0bHkgbW9yZSB0aGFuIDMgY20gZ3JhbnVsYXJpdHkgZm9yIGxhd >>Gl0 >> >>dWRlIGFuZCBzbGlnaHRseSBsZXNzIHRoZSAzIGNtIGdyYW51bGFyaXR5IGZvciBsb25naXR1Z >>GUu >> DQoNClRoYW5rcywNCkFjZWUNCg== >> >> --_000_D576E8B0B65A3aceeciscocom_ >> Content-Type: text/html; charset="utf-8" >> Content-ID: <[email protected]> >> Content-Transfer-Encoding: base64 >> >> >>PGh0bWw+DQo8aGVhZD4NCjxtZXRhIGh0dHAtZXF1aXY9IkNvbnRlbnQtVHlwZSIgY29udGVud >>D0i >> >>dGV4dC9odG1sOyBjaGFyc2V0PXV0Zi04Ij4NCjwvaGVhZD4NCjxib2R5IHN0eWxlPSJ3b3JkL >>Xdy >> >>YXA6IGJyZWFrLXdvcmQ7IC13ZWJraXQtbmJzcC1tb2RlOiBzcGFjZTsgLXdlYmtpdC1saW5lL >>WJy >> >>ZWFrOiBhZnRlci13aGl0ZS1zcGFjZTsgY29sb3I6IHJnYigwLCAwLCAwKTsgZm9udC1zaXplO >>iAx >> >>NHB4OyBmb250LWZhbWlseTogQ2FsaWJyaSwgc2Fucy1zZXJpZjsiPg0KPGRpdj5IaSBQZXRlc >>iwm >> >>bmJzcDs8L2Rpdj4NCjxkaXY+PGJyPg0KPC9kaXY+DQo8ZGl2PldlIHdhbnRlZCB0byBhc3N1c >>mUg >> >>dGhhdCBtaWxsaXNlY29uZHMgb2YgbGF0aXR1ZGUvbG9uZ2l0dWRlIG9mZmVyIGVub3VnaCBnc >>mFu >> >>dWxhcml0eSBmb3IgeW91ciBhcHBsaWNhdGlvbnMuIFRoaXMgc2xpZ2h0bHkgbW9yZSB0aGFuI >>DMg >> >>Y20gZ3JhbnVsYXJpdHkgZm9yIGxhdGl0dWRlIGFuZCBzbGlnaHRseSBsZXNzIHRoZSAzIGNtI >>Gdy >> >>YW51bGFyaXR5IGZvciBsb25naXR1ZGUuJm5ic3A7PC9kaXY+DQo8ZGl2Pjxicj4NCjwvZGl2P >>g0K >> >>PGRpdj5UaGFua3MsPC9kaXY+DQo8ZGl2PkFjZWUmbmJzcDs8L2Rpdj4NCjwvYm9keT4NCjwva >>HRt >> bD4NCg== >> >> --_000_D576E8B0B65A3aceeciscocom_-- >> > > _______________________________________________ Isis-wg mailing list [email protected] https://www.ietf.org/mailman/listinfo/isis-wg
