mapping - Converting from longitude\latitude to Cartesian coordinates -

-

I have some earth-centric coordinate points, which are given as latitude and longitude ().

How can I convert them to the Cartesian coordinates (X, Y, Z) with origin in the center of the Earth?

I have recently done something like "Harvison Formula" on WGS-84 data , Which is derived as "the method of Hawrance" with very satisfactory results. Yes, WGS-84 assumes that the Earth is an ellipse, but I believe that you get an average error of 0.5% using an approach like "Harsin Formula", which can be an acceptable amount error Is your case As long as you are not talking about the distance of some feet and still the earth is theoretically curved, you will also get some error ... If you check the more stringent WGS-84 compatible approach "Vincenti Formula " is needed.

I understand where STAR is coming from, but good software engineering is often about the trade off, so it all depends on the accuracy of your Required for For example, "Manhattan Diesel Formula" can be calculated from the "distance formula" as compared to the result, may be better for some situations because it is computational less expensive. Think "which point is closest?" In scenarios, you do not need accurate distance measurements. In relation to this, implementing "Horsine Formula" is easy and it is good because it uses "circular trigonometry" instead of "cosine law" based approach which is based on two-dimensional trigonometry. So, you get a good balance of accuracy from complexity.

Gentleman by the name of Chris Wayne There is a great website on it that tells you some concepts of concepts and shows different programmatic deployment; In this form, your X / Y conversion question should also be answered.


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more