[mapserver-users] Asking for guidelines about a project

[Saka Royban]

Thanks a lot for your informative answers.
As u mentioned, it's going to be off topic (of mapserver, Postgis list sounds a 
better place for it), but unfortunately I'm still confused.
According to what i understood from your Select(s), you are saving all vehicles 
with their points and timestamps in one table. Why not to partition this into 
some tables for preventing a large table?
(because i have to deal a growing number of vehicles, this is of importance to 
me)

Dear Ben
Also, I'm so sorry, but i didn't find Regina Obe comments on running tracks in 
internet. Do u have any more information?

With best wishes
Best Regards




________________________________
From: Ben Madin <lists at remoteinformation.com.au>
To: mapserver-users at lists.osgeo.org
Sent: Tue, June 21, 2011 8:59:46 AM
Subject: Re: [mapserver-users] Asking for guidelines about a project

Brent et al,

Becoming off topic, but ours went something like :

DATA "the_move FROM (select ST_MakeLine(the_geom) as the_move, sq.polltime
FROM (SELECT the_geom, CAST(polltime AS date) as polltime
FROM vms
WHERE vesselname like '%pg_sql%'
ORDER BY polltime LIMIT 36) sq
GROUP BY sq.polltime) AS foo USING UNIQUE polltime USING SRID=4326"

but all credit for the concept goes to Regina Obe  - I think she was showing 
running tracks! try postgresonline or the postgis list.

cheers

Ben




On 21/06/2011, at 11:15 AM, mapserver-users-request at lists.osgeo.org wrote:

From: Brent Fraser <bfraser at geoanalytic.com>
>
>Date: 20 June 2011 11:43:52 PM AEST
>
>To: Ben Madin <lists at remoteinformation.com.au>
>
>Cc: mapserver-users at lists.osgeo.org
>
>Subject: Re: [mapserver-users] Asking for guidelines about a project
>
>
>Ben,
>
>  Our setup was similar.  We had a current_location table and a archive_location 
>table.  To filter the archive_location for positions in the last 24 hours we had 
>a view:
>
>CREATE VIEW archive_v AS
>            SELECT 
>                   archive_location.vessel_id,
>                   archive_location.time_fix,
>                   archive_location.speed,
>                   archive_location.heading,
>                   archive_location.vessel_coordinate,
>                   archive_location.archive_sequence,
>                   vessel_cfg.vessel_name,
>                   owner.org_name
>            FROM archive_location,owner,vessel_cfg
>            WHERE archive_location.owner_id=owner.org_id AND
>                  archive_location.vessel_id=vessel_cfg.vessel_id AND
>                  ((now() AT TIME ZONE 'utc') - (archive_location.time_fix)) <=  
>'24 hour';
>
>I can't recall how we created linestrings for the tracks from the above view, 
>but I think we used the archive_sequence number (this was assigned at insert 
>time, per vessel) to order the points into lines.
>
>Best Regards, Brent Fraser
>
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