Austin,
Thanks for the tip. I figured there was a way to complete this
process in a loop, but as I'm not too familiar with the intricacies of
stata code (and don't possess a good text on it) I just waste a lot of
time trying different things based on other code I've seen. At any
rate, allow me to give an example of the data I'm working with
(already nonmatch merged and abbreviated for simplicity).
input gisjoin longitude latitude sch_lon sch_lat unitid
G0600010400100 -124.5746 39.97379 -85.95683 31.80067 102368
G0600010400200 -124.5933 39.95392 -86.25552 31.30878 101107
G0600010400300 -124.5983 39.94619 -86.86419 33.10434 101709
G0600010400400 -124.6022 39.95378 -87.67984 34.73044 101736
G0600010400500 -124.6101 39.95397 -85.94818 32.92472 100760
G0600010400600 -124.6098 39.9473 -86.16864 32.38251 101958
G0600010400700 -124.6177 39.94698 -86.99479 33.36999 100919
G0600010400800 -124.6299 39.95023 -87.55314 33.09406 102067
G0600010400900 -124.6261 39.94432 -85.83498 31.29919 101143
G0600010401000 -124.617 39.93631 -85.68978 32.42277 102216
G0600010401100 -124.6081 39.9358 -87.01451 32.44433 101301
G0600010401200 -124.6017 39.93617 -86.34469 32.34993 102313
G0600010401300 -124.6105 39.9232 -86.31091 32.37661 102359
G0600010401400 -124.6178 39.9257 -86.79467 33.46106 102049
G0600010401500 -124.6257 39.9277 -87.0184 32.42337 101073
end
The first three columns represent information from the master data,
while the remaining three columns represent information from the using
data set. I'm supposing that additional variables can be excluded in
this example since what I need is the total number of unitids--of the
using data set--in a radius of, say, 50 miles of gisjoin--of the
master data set.
Thanks,
Diego
--------------------------------------------
David Diego Torres, MA(Sociology)
PhD Candidate in Sociology
2030D Population Studies Center
University of Michigan Institute for Social Research
Ann Arbor MI 48106-1248
Tel 734.763.4098
Fax 734.763.1428
torresd at umich dot edu
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