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

[Bob Basques]

David,

Some more thoughts.

Instead of a line to be queryied from, how about using a point and 
finding the intersections of the flightpaths witha cylinder out some 
radius from the point picked, this would give a more realistic view of 
things as well as not having to worry about getting the query line 
perpendicular to the majority of flightpaths.  It would also aloow for 
those paths that fly near bu t ove directly over a particular spot.

Ok, I'm heading home now, I'm not going to thik about it anymore till 
Monday, but watch out then . . . .

bobb

>
>Sean, not to worry, this application is for monitoring aircraft noise in the
>neighborhoods surrounding an urban airport.  I won't make your plane crash.
>
>Mapserver would still only be used to create two dimensional maps.  For the
>animations, it would just end up being a series of maps shown sequentially
>(possibly the flights being swf files overlayed on the background image in a
>flash application) that showed where the flight is at a particular time and
>a tail of a certain time length trailing behind it. For the elevation
>profile, I would just want to take the geometry from a line a user could
>draw on the map and query out what the elevations of the flights were and
>then any graph could be made elsewhere.  The main thing is to be able to
>have a database that I can easily query out the elevation and time
>information at points along the flight track as well as looking at the track
>as a whole.  Currently at my hands I have ArcSDE on top of Oracle (without
>the spatial extensions) and am looking to possibly to move to
>postgresql/postgis or oracle spatial to maintain this data.  It sounds like
>LWGEOMs may be able to work for me (would I be able to get the elevation at
>a certain place in the line where it intersects a line in two dimensional
>space?) in postgis, but I am far from locked into anything right now.  The
>basic point is to take a 2-d map, filter it by time, and use the powers of
>the database to drive other queries.
>
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