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Is there an easy effective way to determine an objects x/y location in an outdoor setting that is accurate to within 25mm-50mm, preferably <25mm, @ at least 1000M?

I can't help you on this, someone else might.

(04-30-2017, 07:47 PM)Wolfsfriend Wrote: [ -> ]Is there an easy effective way to determine an objects x/y location in an outdoor setting that is accurate to within 25mm-50mm, preferably <25mm, @ at least 1000M?

Not sure if it would be that accurate but you could use a gps device that has google maps and enable its high accuracy mode

you could then place it near the object, get the location and derive the coordinates

Partha the Science nerd partha the giggly nerd LOL

just kidding with you partha good to know we have a science guy on forum

(05-01-2017, 11:54 PM)Compton Wrote: [ -> ]Partha the Science nerd partha the giggly nerd LOL

just kidding with you partha good  to know  we have a science  guy on forum

Cheers!

You could try  GPS Waypoint For Android

This may give you what you are looking for or there are other similar apps.

(05-02-2017, 12:48 PM)Timster Wrote: [ -> ]You could try  GPS Waypoint For Android

This may give you what you are looking for or there are other similar apps.

Well, this GPS-based APP does not state it's resolution so there is no way to know if it would be applicable or not. It was my understanding that GPS is accurate to within 2-4m, and if this is the case it would be useless. Can not something be set up that, let's say a robot could know where it is, not using GPS? Also, GPS will not work if said robot had to go indoors.

Well, Android's high accuracy mode doesn't only use the gps but other means as well to calculate more precisely. Of course, the device needs to have all the required hardware to take full advantage

https://www.androidcentral.com/location-services-whats-difference-between-choices-and-which-should-i-pick#comments

(05-02-2017, 08:49 PM)Wolfsfriend Wrote: [ -> ]Can not something be set up that, let's say a robot could know where it is, not using GPS? Also, GPS will not work if said robot had to go indoors.

If you specifically want to locate the object indoors, you can make use of an indoor positioning system which would include physical transmitters called beacons.

For more information, you may check the article at https://senion.com/indoor-positioning-system/#how