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Offline ur_naz  
#21 Posted : 26 April 2016 07:54:20(UTC)
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Quote:
You scared me!

Oh! You made my day!Clapping
But why SMath does so? Or was it my fault?
Offline mikekaganski  
#22 Posted : 26 April 2016 08:19:00(UTC)
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Actually, it's your fault.
You should always keep attention on where exactly your input goes. It is indicated by underscore, so if you see that you "selected" not your current block, but whole formula, you should use arrows to go to required block prior to entering next part.

But here, SMath could make it apparent showing bracckets...
Best regards,
Mike Kaganski
Offline ur_naz  
#23 Posted : 26 April 2016 08:44:15(UTC)
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I copied twice corrupted region, made the new one and moved the copied parts to it and get proper result... Clap
I can't reproduce this bug?... Maybe leave it to later days...
Offline mikekaganski  
#24 Posted : 26 April 2016 14:52:29(UTC)
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SS-2331 filed.
Best regards,
Mike Kaganski
thanks 1 user thanked mikekaganski for this useful post.
on 26/04/2016(UTC)
Offline ur_naz  
#25 Posted : 26 April 2016 22:11:31(UTC)
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I ported my code from here

http://stackoverflow.com...-two-points-in-bing-maps

But I can't understand nr & dr. What does they mean? And why they finally gives improper result?
Offline mikekaganski  
#26 Posted : 27 April 2016 01:51:49(UTC)
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Originally Posted by: ur_naz Go to Quoted Post
I ported my code from here

http://stackoverflow.com...-two-points-in-bing-maps

But I can't understand nr & dr. What does they mean? And why they finally gives improper result?


List2.sm (12kb) downloaded 25 time(s).

Their purpose is to compensate the difference between equatorial and pole radiuses of Earth, and displace of your arc from Earth major corcumference. Generally, you measure the distance not over equator, nor ober meridian, but over some arc that is both displaced and rotated. You need to know its radius to be able to measure its length.

But anyway, their source is unclear, and they do give wrong results.
You may simply take average radius of Earth to het descent results.

Edited by user 27 April 2016 04:26:14(UTC)  | Reason: Not specified

Best regards,
Mike Kaganski
Offline Jean Giraud  
#27 Posted : 27 April 2016 02:50:59(UTC)
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Looking at the attached:
1. Wikipedia formula 7777 km is wrong
2. one of those calculator 5050 km is wrong too
3. Haversine [NASA] 5915 km looks probable
Why not give some visible locations [Los Angeles, Moscow]

Angle Data 'j' Earth Distance.sm (47kb) downloaded 24 time(s).
Offline Jean Giraud  
#28 Posted : 27 April 2016 03:46:03(UTC)
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Originally Posted by: ur_naz Go to Quoted Post
I copied twice corrupted region, made the new one and moved the copied parts to it and get proper result...
I can't reproduce this bug?... Maybe leave it to later days...


A "corrupted region" is by the software, not by you. By you: just incorrect.
"Corrupted rgion" creates by hemselves, most annoying. Aslo, sometimes "corrupted region"
doctor by themselves. If you supect "corrupted region", recreate on blank sheet from A..Z.
There is no way to detect the corruption. It may just be within some of the primary
function as simple as missed some coefficients in sin(x), for instance.
Corrupted regions did happen in Mathcad 11 [rarely], mostly on long work sheet, even more
annoying. The wrost case: the backup is not up to date and nothing to recreate .

Offline ur_naz  
#29 Posted : 27 April 2016 04:35:19(UTC)
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Originally Posted by: Jean Giraud Go to Quoted Post
Why not give some visible locations [Los Angeles, Moscow]


Here is Moscow-Kiev distance calculation...
It is still improper.

Moscow-Kiev.sm (13kb) downloaded 22 time(s).
Offline mikekaganski  
#30 Posted : 27 April 2016 04:49:39(UTC)
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Originally Posted by: ur_naz Go to Quoted Post
Here is Moscow-Kiev distance calculation...
It is still improper.


Moscow-Kiev2.sm (15kb) downloaded 26 time(s).
Best regards,
Mike Kaganski
Offline mikekaganski  
#31 Posted : 27 April 2016 06:34:13(UTC)
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Vincenty.sm (30kb) downloaded 29 time(s).

https://en.wikipedia.org...ki/Vincenty%27s_formulae

Edited by user 27 April 2016 06:36:58(UTC)  | Reason: Not specified

Best regards,
Mike Kaganski
Offline Jean Giraud  
#32 Posted : 27 April 2016 14:50:53(UTC)
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Thanks Mike:

Vicenty sanity check very closely with some on-line calculator [5060/5045]
Haversine NASA is quite in eccess 5915 km.

Cheers, Jean.
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