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st: Randomize points to map polygons using -spmap- ?


From   [email protected]
To   Statalist <[email protected]>
Subject   st: Randomize points to map polygons using -spmap- ?
Date   Tue, 16 Jul 2013 16:25:48 +0800

Hello Sergiy,

Yes, I would certainly prefer to use Stata; however there appear to be
quite a few options in R, eg -spatstat- and -rgdal- among others.

I am stymied on how to a) form a grid  and b) assign properly
randomized points as you suggest. My sample frame is city data (at the
ADM3+ (commune) level).

Some typos in previous example.

******** Revised example starts here  ********

* cd "User/Data/"

* open-source shapefile for Andorra(AND)

copy "http://gadm.org/data/shp/AND_adm.zip"; AND_adm.zip, replace
unzipfile AND_adm.zip, replace

shp2dta using "AND_adm1", database(ADMdb) coordinates(ADMcoord) replace

use ADMdb, clear

gen cases = ceil(uniform() * 25)
desc

* use ADMcoord, clear
* desc

******** Example ends here  ********

thanks for the suggestions and the Ukraine example-

cheers
Andrew Lover
___________________________________________________________
Epidemiologist
Centre for Infectious Disease Epidemiology Research (CIDER)
Saw Swee Hock School of Public Health
National University of Singapore
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