Re: Not Geography
От | Bob Pawley |
---|---|
Тема | Re: Not Geography |
Дата | |
Msg-id | 002e01c89fa8$4ace8630$6401a8c0@owner обсуждение исходный текст |
Ответ на | Not Geography (Bob Pawley <rjpawley@shaw.ca>) |
Список | pgsql-general |
"In case you are lost with that distinction, geometric data types are based on a flat 2D graph to locate a point, line, rectangle, polygon etc" Yes - this is what I am interested in with the eventual potential of 3D. Bob ----- Original Message ----- From: "Shane Ambler" <pgsql@Sheeky.Biz> To: "Bob Pawley" <rjpawley@shaw.ca> Cc: "Obe, Regina" <robe.dnd@cityofboston.gov>; "PostgreSQL" <pgsql-general@postgresql.org> Sent: Wednesday, April 16, 2008 2:09 AM Subject: Re: [GENERAL] Not Geography > Bob Pawley wrote: >> [GENERAL] Not GeographyI have PostgreSQL, c/w the geometry >> attachment, installed on Win XP. I need to get started using it. I am >> best able to do that by example, however a simple (geometry for >> dummies) description or a tool would also help. > > Are you wanting to use the geometric data types that are included in > postgresql or full GIS types that are added by postgis? > > If you are working with basic geometry instead of geographic data then > this may be somewhat simpler for you. > > In case you are lost with that distinction, geometric data types are based > on a flat 2D graph to locate a point, line, rectangle, polygon etc > > GIS data gets a bit more complex as it accounts for distortions from the > graph being stretched around the roughly circular earth. There are also > several different ways to calculate these distortions and postgis will > translate between them. As well as layering different data and help > deciding what data is viewable at what zoom levels etc. > > postgis is normally only used for geographic data but can be more widely > applied. postgis can also handle 3D data if that is what you are > interested in. > > >> I am on the Postgis list but everyone there seems to be so >> geographically oriented that I wanted to query a larger audience. >> >> Bob >> >> ----- Original Message ----- From: Obe, Regina To: Bob Pawley ; >> PostgreSQL Sent: Tuesday, April 15, 2008 10:50 AM Subject: RE: >> [GENERAL] Not Geography >> >> >>> I have Postgresql database that I would like to link to the >>> geometry side of Postgis. (This has little comparison to geography) >>> >> >>> Does anyone know of a tool or documentation that could get me >>> started?? >> >>> Bob >> >> Bob, I don't quite understand your question. Are you not sure how to >> install PostGIS, how to integrate it in your existing datbase, or >> once you install how to get started using it? How to do it depends >> on the operating system you are using. Once you have it installed >> you may want to join the Postgis newsgroup for further help >> >> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> >> Hope that helps, Regina >> > > > -- > > Shane Ambler > pgSQL (at) Sheeky (dot) Biz > > Get Sheeky @ http://Sheeky.Biz
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