Active Oldest Votes. Improve this answer. Don Meltz Don Meltz 4, 1 1 gold badge 27 27 silver badges 31 31 bronze badges. And as for why x is usually referenced before y, that has to do with the mathematical convention: when referencing Cartesian coordinates i.
I really think the second part is as relevant as the first, unless you have a reason to disagree. I disagree. I believe historically, Lat could only be derived after accurately establishing Lon. I'm afraid I have to downvote this reply as a result of the edit, Don.
A natural reading of your phrase "longitude is based on latitude" is that finding longitude historically required knowing the latitude, but that assertion is wrong. Some clarification of what you mean by "based on" therefore is in order here. OK, a little more research says I was wrong. When I answered 9 months ago, I had just read "The Story of Maps" by Lloyd Brown, and mistakenly concluded lat had to be determined before lon could be calculated.
However, lon can be determined using only time dif from UTC. No need to know lat. I re-rolled back to revision - 2.
Llaves Llaves 5, 4 4 gold badges 25 25 silver badges 47 47 bronze badges. Engineering, geography, mathematics, astronomy, and physics use several different conventional orderings and names for spherical coordinates.
This suggests there is something arbitrary about your reasoning. I guess I wasn't clear. Lurking here is the concept of orientation : the x-y convention establishes an orientation for the plane. Similarly, lat-lon establishes an orientation for the sphere's surface. With such conventions in effect, all projections that look orientation-preserving that is, they do not turn shapes into their mirror images require orientation- reversing calculations.
Thus there is a strong reason to prefer long-lat as the order. A good answer therefore would adduce information, probably historical in nature, that clarifies why a contrary convention ever became popular. The GeoJSON standard is fairly typical and succinct: The order of elements must follow x, y, z order easting, northing, altitude for coordinates in a projected coordinate reference system, or longitude, latitude, altitude for coordinates in a geographic coordinate reference system.
Brandon Rhodes I see some disagreement here :I TWo choices to pick - too many! Readers should note that ISO explicitly states you should always use [lat, lon] format in any UI and it's not - as might be inferred - merely a matter of personal preference.
The ISO standard specifically only applies to form inputs, not storage mechanisms, software or formats. This is a handy summary. Add a comment. Jiri Kriz Jiri Kriz 8, 3 3 gold badges 27 27 silver badges 36 36 bronze badges. Except in KML files. There coordinates are stored as lng,lat,alt; probably because that can be translated to x,y,z — Wouter van Nifterick.
ChrisW ChrisW 4, 6 6 gold badges 49 49 silver badges 85 85 bronze badges. Personally I've never seen anything but latitude followed by longitude. Hopefully you'll not have to be dealing with applications that old. Terry Terry 1, 2 2 gold badges 11 11 silver badges 25 25 bronze badges.
It's easily observable when you work with worldwide applications. Just type any pair of longitude and latitude coordinates into Google maps and you'll see it interprets it as long, lat , not vice versa.
That's an example of a very widely-used system. For example, my hometown of Eugene, Oregon is at approximately N If in maps. If I enter Interestingly, though, if I enter Also reference. So the preferred order depends on personal preference! Graham Graham 91 1 1 silver badge 1 1 bronze badge. I think he means programmatically and with a technical reference but I could be mistaken.
The history lesson was interesting, though. This not related to the question, but definitely interesting. Thanks : — Mikko Ohtamaa. But it does make sense, for if only map coordinates would be used, it would be without question that the order would be longitude, latitude, as in X, Y; the confusion only exists because of the hundreds of years of precedence of saying and hearing latitude, longitude everywhere.
The doc itself says it's Especially important in the UI. Historical conventional usage gives the latitude value before the longitude value. Users in the marine and air navigation fields, and involved with emergency response are used to seeing latitude and longitude given in this order. If the height or depth is also given, it follows longitude. Presenting coordinate values in another order has life-safety implications. The great thing about standards is that there are so many of them The OP asked of the "preferred order".
Aleksander Adamowski Aleksander Adamowski 9 9 silver badges 8 8 bronze badges. Longitude then Latitude lon, lat. David David 11 11 silver badges 23 23 bronze badges. Basically, it's that navigators have traditionally used the lat-lon ordering, so if you messed with that ordering you might screw up your navigations.
So google is using the traditional for a blog and the 2D plane ordering for their data structure. Sign up or log in Sign up using Google. Common coordinate systems Number line. Cartesian coordinate system. Polar coordinate system. Cylindrical and spherical coordinate systems. Homogeneous coordinate system.
Other commonly used systems. Relativistic coordinate systems. The following are some reasons for using a projected coordinate system : Latitude-longitude is a good system for storing spatial data but not as good for viewing, querying, or analyzing maps. Degrees of latitude and longitude are not consistent units of measure for area, shape, distance, and direction.
A coordinate graph is a set of two number lines that run perpendicular to one another. These number lines are called axes. The horizontal number line is the x-axis, and the vertical number line is the y-axis. The two axes intersect where each of them are equal to zero, and this intersection point is called the origin. Choose the Projected Coordinate System folder or the Geographic Coodinate System folder, depending upon the Coordinate Systems of your other files and how you want to match them.
This gives cartographers a map to work with always in meters. Why does Latitude come before longitude? Category: science geography. Latitude was first used as a measurement in around BC by the Phoenicians using the pole star as a reference. Which is longer latitude or longitude? What is latitude and longitude in simple terms? What is the proper way to write coordinates?
How do you remember the difference between latitude and longitude? What is the difference between latitude and longitude and GPS coordinates?
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