[postgis-users] Selecting geocoded postal codes within a given distance ( miles for example )

[Hugh W. O'Brien]

I probably should have posted that I am a noob to not only using PostGIS 
but also using a spatial engine in general.  So I am not familiar with 
the terms UTM, state place. etc...  So, how would one go about 
projecting their longitude/latitude data into UTM for example. Would 
doing so convert my degrees long/lat to actual distance units such that 
the standard bounding box example in the FAQ would be applicable?

-- Hugh O'Brien

Sung-Gheel Jang wrote:

>Hello,
>
>You had better project your dataset first according to a proper projection
>such as UTM, state plane etc. I believe the decimal degress can't deal with
>the surface distance. It's only for a location of the earth sphere.
>
>Sung-Gheel
>
>-----Original Message-----
>From: postgis-users-bounces at postgis.refractions.net
>[mailto:postgis-users-bounces at postgis.refractions.net]On Behalf Of Hugh
>W. O'Brien
>Sent: Monday, December 16, 2002 1:42 PM
>To: postgis-users at postgis.refractions.net
>Subject: [postgis-users] Selecting geocoded postal codes within a given
>distance ( miles for example )
>
>
>Dear List,
>
>How would one go about selecting the geocoded postal codes within given
>a distance ( say in miles ) of another geocoded postal code.  Finding
>the long/lat of the postal code we are searching around is simple ( no
>help is needed there ). I have read/seen the faq for postgis.  The
>example given  there using a bounding box doesn't really fit what I am
>trying to do exactly because I will be dealing with degrees
>longitude/latitude and miles ( the example in the faq uses meters
>exclusively ).
>
>Thanks in advance for any help you can give.
>
>-- Hugh W. O'Brien
>
>
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