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# The standard of taking the elements of street in Database

 0 In the database, the streets are expressed as a vector of nodes {points(lat, long)} ... So would you please explain the standards and methods which are depended on taking these specific points to forming the way? what about the distance between two points, and the number of nodes in each vector... Many thanks. asked 23 Apr '18, 15:18 WijdanMTak 11●1●1●2 accept rate: 0% 1 It might help if you can give a bit of context to your question - what sort of answers were you expecting to get? What's the context in which you were asking it? (19 Jun '18, 14:40) SomeoneElse ♦

 2 There can be a maximum of 2000 nodes in a way. That is about it. answered 24 Apr '18, 12:44 SimonPoole ♦ 44.7k●13●326●701 accept rate: 18% Thank you for your time, I really appreciate that. That was helpful, but I want to know the minimum distance between two consecutive points. I would be grateful if you give me some details or references. Best regards. (19 Jun '18, 12:39) WijdanMTak See https://wiki.openstreetmap.org/wiki/Node. Lat and lon both have 7 decimal places. Quoting from there: "The 7 rounded decimal places for coordinates in degrees define the worst error of longitude to a maximum of ±5.56595 millimeters on the Earth equator". So if I understand correctly the minimum distance is 5.5 millimeters and lower, depending on the specific longitude. There is a similar question at https://help.openstreetmap.org/questions/7307/how-precise-can-osm-get which has a slightly different answer: around 1 centimeter. According to https://en.wikipedia.org/wiki/Decimal_degrees 1 centimeter is correct for 7 decimal places. (19 Jun '18, 12:47) scai ♦

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question asked: 23 Apr '18, 15:18

question was seen: 2,421 times

last updated: 19 Jun '18, 14:40

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