[postgis-users] Standard projection for continental US?

[David Jantzen]

Thanks Regina, that looks like a good option.  Distance from Seattle to
Miami is 2717 miles under SRID 2163 versus 2730 miles under the custom
projection.  Definitely close enough for what I'm doing.

On Fri, 2008-10-17 at 15:47 -0400, Obe, Regina wrote:
> I usually us US National Atlas Equal Area - Meters (SRID 2163) 
> 
> Though maybe I should try the below and see how my numbers match up.
> 
> -----Original Message-----
> From: postgis-users-bounces at postgis.refractions.net
> [mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
> David Jantzen
> Sent: Friday, October 17, 2008 3:35 PM
> To: postgis
> Subject: [postgis-users] Standard projection for continental US?
> 
> Hey All,
> 
> I'm wondering if there's an official or standard projection that covers
> the continental US?  When I first joined the list, Paul kindly provided
> this:
> 
> INSERT INTO SPATIAL_REF_SYS VALUES (1000000,'ME',1000000,'','+proj=aea
> +lat_0=23 +lon_0=-96 +lat_1=29.5 +lat_2=45.5 +datum=NAD83
> +ellps=GRS80');
> 
> It seems to work accurately enough, I'm just curious if there's a
> standard definition like those in spatial_ref_sys.sql.
> 
> Thanks,
> David
> 
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