Do Mapserver enables distributed processing spatial data?
karsten at TERRAGIS.NET
Thu Dec 6 03:00:47 EST 2007
If you want to use your data in may different clients and/or from a variety
of distributed locations - you can look into serving them with as Web
Mapping Services (WMS for raster output) or Web Feature Services WFS (for
vector output) using an engine like mapserver or geoserver. The data can
then be accessed over the web via a lot of different clients, mapserver
itself, GGIS, Udig, ArcGIS etc.
Take a look at
Mapserver and WMS
Mapserver and WFS
OGC web services workshop
Practical mapfile sample snipplets
From: Luis Angel Monge De La Cruz [mailto:boommonge at GMAIL.COM]
Sent: Monday, December 03, 2007 13:48
Subject: Re: Do Mapserver enables distributed processing spatial data?
Thanks for the suggestions. These options sound good.
But the reason to have the database in more than one computer, is that
really so are available, it is unlikely that the information is integrated
into a single site, the application is for risk management, where there are
layers of information disseminated in several locations, including various
sources, such as graphics files, dbf, and postgresql. I am currently
studying for a master and my idea is to propose improvements to mapserver in
this regard. ¿how? Developing a mechanism to be included in the file. Map
more than one source to a layer, so something like a mirror, and that the
choice of the server is based not only on the availability of the source,
also the bandwidth , reliability and others.
On Dec 3, 2007 6:49 PM, Milo van der Linden < mlinden at zeelandnet.nl
<mailto:mlinden at zeelandnet.nl> > wrote:
No, mapserver cannot switch automatically unless you tell it to in a php
script or something.
But why put these databases on two computers? Why not use a single server
that is always on and holds the database?
There are many ways to achieve this, but that is basically no mapserver
First of all, storing gis data on a single computer always makes it stand
alone. Storing it on a server makes it available to the server and to
servers with rights on that particular server via the network.
Best thing I would do if I where you:
- Set up a postGIS spatial database and provide both workstations with
access. If you use qGIS or openJump as the GIS client, this is a very
- If you want to do the same, but with a more commercial solution; consider
MapInfo with SQL-server Spatialware or ArcView with SDE.
Databases have the advantage that they are designed to be multi-user where
as GIS data most of the time is not.
Luis Angel Monge De La Cruz schreef:
This is my question. Do Mapserver enables distributed processing spatial
- Two computers
- Each computer has a spatial database
- What happen?. If I want to obtain a spatial data from the computer # 1
through mapserver and is not available this database. Can mapserver look so
automatic that spatial data in the database from the computer computer # 2?
Milo van der Linden
mlinden at zeelandnet.nl
milovanderlinden at gmail.com
milo at 3dsite.nl
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