Allisonhk

Proximity analysis: Nearest point that occurred at a later date

Discussion created by Allisonhk on Nov 21, 2012
Latest reply on Nov 26, 2012 by bharold-esristaff
Hi,

I have 800 odd instances of pest detections over a period of about 5 years. I want to do a proximity analysis that identifies for every detection (point) the closest subsequent detection. The points are named in chronological order so point number 1 occurred first in May 2007 and point number 800 occurred quite recently.

example of how my data looks....

number                lat        long                    date

2
3
4
.....
....
....
800

What I want to get is something along the lines of

Number                nearest subsequent detection                distance (km)
                         (the nearest detection of a high
                           number or later date than itself)               
1                                        nearest point (2-800)
2                                        nearest point (3-800)
3                                         nearest point (4-800)
4                                         nearest point (5-800)
...
....
...
800

I would really like to know if anyone has done something similar as I have had a look through the forums and only found proximity to any closest point.

Thanks for your time
Regards
Allison

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