hoangdiep Posted March 19, 2020 Report Share Posted March 19, 2020 When we are use function area and When we are use function Cartesian area in the mapinfo . Help me please ! Quote Link to comment Share on other sites More sharing options...
Lurker Posted March 21, 2020 Report Share Posted March 21, 2020 did you mean for function area is Spherical function area? 1 Quote Link to comment Share on other sites More sharing options...
hoangdiep Posted March 21, 2020 Author Report Share Posted March 21, 2020 (edited) Thank Pro, Is here, but i can't insert picture: https://imgur.com/a/wejXC97 Edited March 21, 2020 by hoangdiep Quote Link to comment Share on other sites More sharing options...
Lurker Posted March 22, 2020 Report Share Posted March 22, 2020 sorry i cant see your picture, our country block imgur, really suck 😷 1 Quote Link to comment Share on other sites More sharing options...
juliusmall Posted March 23, 2020 Report Share Posted March 23, 2020 I think is related to the two main option for surfaces calculus from MI. They are exposed , as an example, at general settings in older MI: you have the option to calculate a surface in "cartesian" or "spherical" . In the new versions this is more hidden. In your case, I think that you are working in a long/lat system, perhaps WGS84; this one is entering in the so called spherical calculus, and you have this as implicit (the screen capture). The cartesian calculus are exposed as options. You must chose, evaluate carefully what you need, what you are targeting in the project. You will make unhappy an engineer if you are offering him a map with degrees... m.....seconds. In reverse, a sailor if you are offering him metric coordinates.... Quote Link to comment Share on other sites More sharing options...
PeterHM Posted March 26, 2020 Report Share Posted March 26, 2020 The Area, and SphericalArea, functions are to be used on lat/long data. Here you are using degrees for coordinates CartesianArea is to be used on projected data, that's typically data stored in a local (cartesian) projection. Here you would be using meters for coordinates. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.