Re: st: spmap & water

[Maurizio Pisati <maurizio.pisati@unimib.it>]

If you have another shapefile defining the polygons that represent 
water, then you can (a) convert it to the -spmap- format using 
-shp2dta-, and (b) add these water polygons to your map using option 
-polygon- (and, possibly, option -polyfirst-).
Best wishes,
Maurizio Pisati




Il 02/07/10 00.06, Carolina Herrera ha scritto:
> Hi everyone,
>
> I'm trying to produce a heat map of the state of California using -spmap- and -shp2data-.  However, when I use the options as described on http://www.stata.com/support/faqs/graphics/spmap.html<http://www.stata.com/support/faqs/graphics/spmap.html>    I have problems producing the county level polygons for the Bay Area.  San Francisco Bay doesn't appear and half the city of San Francisco appears to be floating off the coast. I've checked for missing counties and I don't believe that is the problem.  My GIS savvy colleagues tell me that water is often not in the *.shp and *.dbf files but I'm not sure how to integrate other mapping files into my Stata code. Has anyone else encountered this problem?
>
> There are the relevant bits of code.
> * create my databases from the shapefile
> shp2dta using CA_county, database(cacounty2db) coordinates(cacounty2coord) genid(id)
> *rename county identifier in order to produce merge
> gen fipscd=CNTY_FIPS
> sort fipscd
> save cacounty2db.dta, replace
>
> *merge onto my main dataset
> merge fipscd using cacounty2db.dta, sort uniqusing
>
> *Heat Maps
> foreach x of local yrsthree {
>   foreach y of local sets{
>    spmap u_`y' using cacountycoord if year==`x', id(id) fcolor(Blues2)
> graph export u`y'`x'.tif,replace
>    spmap p_`y' using cacountycoord if year==`x', id(id) fcolor(Blues2)
> graph export p`y'`x'.tif,replace
> }
> }
>
> many thanks in advance,
> Carolina
>
> Carolina Herrera, MA
> The Center for the Health Professions
> University of California, San Francisco
>
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