problem plotting latitude and longitude using grmap

[Giovanni Primativo]

Dear Statalists,
I am having some problem in plotting latitude and longitude on a map
I have performed the following code

 grmap using lazioc, t(2000) id(sh_asl) point(data("lazio_hosp_balanced.dta") x(xc) y(yc))

where:

 lazioc.dta

is the coordinates shapefile,

 lazio_hosp_balanced.dta

is the dataset where I have stored latitude and longitude

 xc  xy

are the converted latitude and longitude variables that have been projected the same way as "lazio_hosp_balanced" (web_mercator)


What I have reached is only this:Graph.gph