Followers 0

# waypoint projection down to cm possible?

## Recommended Posts

Hello,

just a question:Iis waypoint projection down to cm possible?  I know the common apps round it up to meters and it is not really necessary for everyday geocaching. It is just a general question. For example I have the coordinate N 45° 28.888 W 100° 01.111  and walk 17.35 meters north, that is 1735 cm.

Edited by Catanserg

Yes. it's possible. ;-)

Hans

Yes, there are tools out there that can do this. One that was created by a cacher is FizzyCalc. I recently used it to do a projection using a distance in metres to 6 decimal places (micrometres). HHL showed that GSAK can do it, and I also use this US National Geodetic Survey tool sometimes (though it's less friendly to use than FizzyCalc).

Here's a nice online tool:

Hans

Edited by HHL

This luddite needs help in understanding in what situation/s this can be useful or is it just academic discussion?

8 hours ago, colleda said:

This luddite needs help in understanding in what situation/s this can be useful or is it just academic discussion?

Reread the first post more carefully and you will know.

Quote

just a question [...] it is not really necessary for everyday geocaching. It is just a general question.

Happy Learning

Hans

9 hours ago, colleda said:

This luddite needs help in understanding in what situation/s this can be useful or is it just academic discussion?

Try high-D mystery caches. Some may require micrometer resolution.

1 hour ago, HHL said:

Reread the first post more carefully and you will know.

Happy Learning

Hans

Thanks Hans. My mind got tied up from overthinking the question.

21 minutes ago, arisoft said:

Try high-D mystery caches. Some may require micrometer resolution.

Thanks arisoft. I have trouble enough with D2 mysteries. Some day I may progress. Math was my favourite subject in school but I wasn't real good at it though I loved solving quadratic equations.

1 hour ago, colleda said:

In Geocaching we need to solve spheroidic equations, in practice, you need a set of tools for iterative calculations.

Here is an example https://coord.info/GC15000

16 minutes ago, arisoft said:

In Geocaching we need to solve spheroidic equations, in practice, you need a set of tools for iterative calculations.

Here is an example https://coord.info/GC15000

Whoa! Way above my pay scale. I kinda got the spheroidic stuff but the example cache had me staring blankly at the screen interspersed with Finnish Google translations.  I was quite chuffed that I recognised it was Finnish even though I don't know any Finnish words. I was in Finland last year, but only in transit for a couple of hours, flying from Japan to Budapest.

54 minutes ago, colleda said:

Whoa! Way above my pay scale. I kinda got the spheroidic stuff but the example cache had me staring blankly at the screen interspersed with Finnish Google translations.  I was quite chuffed that I recognised it was Finnish even though I don't know any Finnish words. I was in Finland last year, but only in transit for a couple of hours, flying from Japan to Budapest.

The description is written in english. Did you forget to shut down your automatic Google translator?

On 12/20/2019 at 4:18 PM, Catanserg said:

Hello,

just a question:Iis waypoint projection down to cm possible?  I know the common apps round it up to meters and it is not really necessary for everyday geocaching. It is just a general question. For example I have the coordinate N 45° 28.888 W 100° 01.111  and walk 17.35 meters north, that is 1735 cm.

Negative. Because the N XX XX.xxx format can not be within a centimeter of being accurate on it's own,  it would have to be N XX XX.xxxxxx (6 digits) format to start with to have centimeter accuracy.

Example

N 45° 28.888 W 100° 01.111 to N 45° 28.889 W 100° 01.112 is about 2 meters or 200 centimeters.

N 45 28.8885 would be about 100 centimeters from N 45 28.888 ....

6 hours ago, gpsblake said:

Negative. Because the N XX XX.xxx format can not be within a centimeter of being accurate on it's own

Not so fast. In many cases the distance and bearing will project exactly to the milliminute grid which is used as an implied geochecker.

## Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

×   Pasted as rich text.   Paste as plain text instead

Only 75 emoji are allowed.