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Re: st: -spmap- reason for no aspect() option?


From   "Dan Weitzenfeld" <dan.weitzenfeld@emsense.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: -spmap- reason for no aspect() option?
Date   Wed, 27 Aug 2008 10:12:50 -0700

Thanks, all, for the feedback.  I hadn't noticed the -freestyle-
option.  My graphs are now lining up perfectly.

On Wed, Aug 27, 2008 at 12:26 AM, Maurizio Pisati
<maurizio.pisati@unimib.it> wrote:
>
> Dear Dan,
> the reason why option -aspect()- is preset in -spmap- is exactly that outlined by Sergiy. However, as Scott has correctly pointed out, by specifying option -freestyle- (introduced in the latest version of -spmap) you can gain control over most of the -graph twoway- options. Quoting from the -spmap- help file:
>
> freestyle requests that, when drawing the graph, all the formatting presets and restrictions built in spmap be
>   ignored. By default, spmap presets the values of some graph options and restricts the use of some others,
>   so as to produce a "nice" graph automatically. By specifying option freestyle, the user loses this feature but
>   gains full control over most of the graph formatting options.
>
> Best wishes,
> Maurizio
>
>
>
>
> At 03.58 27/08/2008, you wrote:
>>
>> Hello Dan,
>>
>> 1. Correct me if I am wrong, but the most probable reason that
>> aspect() option is not implemented is the following:
>> http://en.wikipedia.org/wiki/Map_projection
>>
>> E.g. Americans commonly use Mercator, while Russians prefer Albers
>> projection. The difference can be very large and depends on the
>> distance from the equator. The transformation between most (all?)
>> projection pairs is non-linear and can't be implemented as
>> stretching/squeezing maps. -spmap- (and -tmap-) were developed for GIS
>> graphs in Stata.
>
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