[Mapserver-users] postgis and 4d data in mapserver

[Sean Gillies]

On Jun 25, 2004, at 2:46 PM, David Blasby wrote:

> David Bitner wrote:
>
>> Off topic at first, but there are a number of PostGIS folks here too:
>> I am looking at using postgis to work with airport traffic data.  As 
>> part of
>> this I need a time and elevation component.  What is the best way to 
>> work
>> with four dimensional data in postgis?  What is an example of a query 
>> that
>> would access either the elevation or the time component of the 
>> geometry?
>> The next step of course, is creating a mapserver app. perhaps with 
>> flash, to
>> display an animation of flights going over an area over a certain 
>> period of
>> time.  And also to be able to select the flight tracks by a line to 
>> get a
>> cross section of the elevations the planes are at a certain point.  
>> But,
>> it's sometimes best to take things one step at a time.  Any and all 
>> pointers
>> of course would be greatly appreciated.
>
> The new "LWGEOM" PostGIS type support (x,y), (x,y,z), and (x,y,m,z) 
> points, lines, polygons, and mulit* geometries.
>
> See the postgis mailing list for more details.
>
> NOTE: LWGEOMs are still in BETA (not many people are using them, so 
> they are not well tested).
>
> dave

Hey, I fly on planes!  I *demand* maximum precision. :)

David, mapserver is for drawing pictures of spatial data.  It's
great at what it does, but it's not an N dimensional visualization
environment.

cheers,
Sean

--
Sean Gillies
sgillies at frii dot com
http://users.frii.com/sgillies