Discussions

Getting a GPS point based off of current location and a given distance.

Posted by Patrick Mccabe on June 28, 2010 at 8:27pm
Something i would like to add to my AGV is to the ability to tell it to go 100 ft forward on your current heading, or 50 feet at the heading of 60. So i wanted to ask if there was a formula for this before i make it myself. Basically what i am looking for is a formula that given the current gps location, a distance to the next wanted to gps point (say 100ft) and then the heading to get to the point. Instead of finding the distance between 2 points and the heading. I want to find point A knowing point B, the distance, and heading. Do you know of such a formula, it seems like it wouldnt be that hard for me to work backwards to get the formula. Like i said, just asking before i sit down with pad and paper and work on it.

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –
Follow

Replies

  • space_nut June 30, 2010 at 12:03pm
    yeah, this took me a while to figure out, too.

    The ardupilot code has some routines that provide inspiration, I've attached my own (crappy but functional) code that runs on an Ardupilot. It's also got a routine that works out direction and distance.

    The hardest thing I found was visualizing the coordinate system. X coordinates work differently at various latitudes and you have to scale degrees by the Cosine of the Lat. Also, when you work with angles, things like Cos and Tan work from a "zero" that is 90 degrees out from regular North/South bearings. Urgh.

    Anyway, I hope this helps.

    cartest_03.zip

  • 3D Robotics
    Chris Anderson June 28, 2010 at 10:12pm
    All the math you need is here.
    Calculate distance and bearing between two Latitude/Longitude points using haversine formula in Jav…
This reply was deleted.

Activity

DIY Robocars via Twitter
https://pidrogen.com/
Jan 28
DIY Robocars via Twitter
RT @Heavy02011: ⁦@diyrobocars⁩ : A Home-brew computer club* for Connected Autonomous Driving. talk at #piandmore ⁦@PiAndMore⁩ on Jan 23rd h…
Jan 23
DIY Robocars via Twitter
RT @a1k0n: New blog post! Deep dive into my ceiling light based localization algorithm which runs in 1ms on a Raspberry Pi 3: https://t.co/…
Jan 23
DIY Robocars via Twitter
Great new guide to using @donkey_car https://custom-build-robots.com/donkey-car-e-book-en
Jan 23
DIY Robocars via Twitter
RT @chr1sa: The next @DIYRobocars virtual AI race is tomorrow morn at 9:00am PT. You can watch live on Twitch https://www.meetup.com/DIYRobocars/events/275268196/
Jan 22
DIY Robocars via Twitter
New version of Intel OpenBot! This resolves many of the issues with the first version, including a much smoother tr… https://twitter.com/i/web/status/1352395636369313798
Jan 21
DIY Drones via Twitter
Using ArduRover with an RTK GPS https://ift.tt/2N9I3RO
Jan 18
DIY Drones via Twitter
https://diyrobocars.com/2021/01/18/using-ardurover-with-an-rtk-gps/
Jan 18
DIY Robocars via Twitter
https://diyrobocars.com/2021/01/18/using-ardurover-with-an-rtk-gps/
Jan 18
DIY Robocars via Twitter
https://twitter.com/EclipseCyclone/status/1350139283366060032
Jan 15
DIY Robocars via Twitter
https://twitter.com/DARPA/status/1350123937762603015
Jan 15
DIY Drones via Twitter
https://twitter.com/Ivangrov/status/1349777122194321409
Jan 14
DIY Robocars via Twitter
RT @Heavy02011: @diyrobocars : A Home-brew computer club* for Connected Autonomous Driving on Jan 23rd, 2021 https://www.meetup.com/Connected-Autonomous-Driving/events/275728684/ #Meetu…
Jan 14
DIY Robocars via Twitter
https://twitter.com/Ivangrov/status/1349777122194321409
Jan 14
DIY Robocars via Twitter
RT @Heavy02011: ⁦@diyrobocars⁩ Autonomous Driving Assembly at #rC3. join us at https://rc3.world/rc3/assembly/diyrobocars-f1tenth/ ⁦@f1tenth⁩ ⁦@DAVGtech⁩ ⁦@DWalmroth⁩…
Jan 11
DIY Robocars via Twitter
RT @chr1sa: New car designs coming for our next @DIYRobocars @donkey_car virtual race on the 23rd. Choose any one you want at race time Le…
Jan 11
More…