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Procedure for locating nearest site on X & Y Axis
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00539725
Message ID:
00539986
Vues:
10
>I have a situation where I have X-Axis and Y-Axis coordinates for various sites in a geographical region. From one of those sites, I need to create a list of the other sites, beginning with the nearest one, and continuing out with the next nearest one, and so on, in that order.
>
>I am using a set of cursors, and manipulating them into a table that I actually display, but the final sort order is not quite there. If I manually measure some of the distances on the map as compared to the resulting list, they are still a little jumbled.
>
>Has anyone ever created a procedure that will do anything close to this? I am almost out of ideas, and need some help. ANY suggestions would be greatly appreciated.
>
>Thanks in advance...

See Thread #422168 Message #422256 for the formula for longitude/latitude distances. You may be able to use it for one of your columns and then use it for sorting.
Larry Miller
MCSD
LWMiller3@verizon.net

Accumulate learning by study, understand what you learn by questioning. -- Mingjiao
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