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Re: st: spmap and ysize


From   "Sergiy Radyakin" <serjradyakin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: spmap and ysize
Date   Thu, 17 Apr 2008 13:14:26 -0400

Hello Conner

1) summarize x_coord and y_coord and see if the span of x (y) is >20
times the span of y (x).

2) build a scatter of your points and see how it works

3) I don't think you can specify xsize and ysize since this will
distort the map (squeeze it or stretch it), so this would be probably
not the best way to go.

4) check the missings, I don't know if spmap supports missing values
of  coordinates (one or both missings).

5) if your coordinates also come from a shapefile - make sure the
projections are the same. Oftentimes you bump on the military data,
where coordinates range in the order of hundreds of thousands (meters,
not degrees).

Hope anything of the above helps.

Sergiy Radyakin

On 4/17/08, Conner Mullally <mullally@primal.ucdavis.edu> wrote:
> Hello,
> I am attempting to draw a polygon basemap with a point map
> superimposed on top of it.  I don't have any problems
> drawing the polygon map by itself, but when I try to add the
> point map, I get an error message stating "ysize must be
> between 1.000 and 20.000."  When I try to specify the y
> size, I am told this option is not allowed. It was my
> understanding that in the current version of spmap, this
> option IS allowed.  Any of you spmap users/creators have a
> suggestion?
> Thanks,
> Conner
> output from stata:
> . *spmap using "piscocoor.dta", id(id)
> . spmap using "piscocoor.dta", id(id) point(xcoord(x_coord)
> ycoord(y_co
> > ord) prop(poblacion_por_centro) data(mapa_censo_merge))
> ysize must be between 1.000 and 20.000
> . spmap using "piscocoor.dta", id(id) point(xcoord(x_coord)
> ycoord(y_co
> > ord) prop(poblacion_por_centro) data(mapa_censo_merge))
> ysize(5)
> option ysize() not allowed
>
>
>
>
>
>
> **********************************************************
> Conner Mullally
> Ph.D. Candidate
> Department of Agricultural and Resource Economics
> University of California, Davis
> office: (530) 752-1048
> cell:     (530) 902-7484
> mullally@primal.ucdavis.edu
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