Hi Sarel,
please cc the list since it might be useful for other people searching
the archives one day.
1) AFAIK WMS server does not generate any images in the temp dir when
using Mapserver in CGI mode. The WMS client in Mapserver does (so if you
use remote WMS layers). I don't think WFS and WCS server store temporary
images, but WFS client will store the file.
2) yes, you can use the same MAP file, see the OGC web services workshop.
3) it is not different, it just means the output format differs (so GML
for WFS instead of e.g. image/png for WMS), the source data can be the same.
4) I am unaware of any KML support in Mapserver at the moment.
Best regards,
Bart
Sarel Coetzer wrote:
Thanks for the help Bart
Yes, I do have some questions.
- WMS creates a lot of images in my temp folder (I have a
batch files cleaning this out regularly ), does WCS/WFS create any
temp images?
- Would one mapfile be able to host all tree services?
- For my MS WMS am thinking about using the FWTools to export
my postGIS layers from server to client (clients format choice
shpfile,mapinfo or kml), how would WCS or WFS handle this differently?
- Last one (sorry!) What type of service does KMLMapsever
require, I have tried spitting out KML but I get an error in Google
earth saying it has lost the network connection.
Many thanks
Regards
Sarel
On Tue, May 13, 2008 at 10:27 AM, Bart van den Eijnden (OSGIS)
[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote:
Hi Sarel,
I can probably explain it in a few sentences.
WMS is a web mapping service, so it is meant to render an image of
data, be it vector or raster data. It only gives you back an image
representation of your data.
WFS is a web feature service, it is meant to deliver the features
(in vector format) to the client, so the raw data. The vector
format is mostly GML (Geography Markup Language).
WCS is a web coverage service, it is the raster version of WFS, so
to deliver raster coverages in a raw format to the client.
If you only need images and a query on a point click, stick with
WMS. If you need your users to actually download data, you will
need WFS + WCS.
There is also a thing called SLD WMS (Styled Layer Descriptor),
where the WMS client can change the symbology of the map, and get
an image back in different colors/patterns etc. than the default
one advertized by the service.
Hope this helps. If you have further specific questions, don't
hesitate to ask.
Best regards,
Bart
Sarel Coetzer wrote:
Hi
Is there anywhere a brief explanation of the deferent types of
map services such as WFS, WMS and WCS.
What each service does differently then the other and how to
identify which one would be the correct service to use for a
specific application.
I have read the various how to's on the wiki but I am trying
to find a one page comparison of capabilities/advantages or
disadvantages of these various services.
Regards
Sarel
Regards
Sarel
--
http://sarelgis.blogspot.com/;
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Bart van den Eijnden
OSGIS, Open Source GIS
[EMAIL PROTECTED] mailto:[EMAIL PROTECTED]
http://www.osgis.nl
--
http://sarelgis.blogspot.com/;
--
Bart van den Eijnden
OSGIS, Open Source GIS
[EMAIL PROTECTED]
http://www.osgis.nl
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