Re: [Geotools-devel] Binding DirectPosition with app-schema

Tara Athan Tue, 05 Oct 2010 11:32:47 -0700

Andrea Aime wrote:

On Tue, Oct 5, 2010 at 10:01 AM, Ben Caradoc-Davies
<[email protected]> wrote:

On 05/10/10 15:57, Andrea Aime wrote:

On Tue, Oct 5, 2010 at 9:51 AM, Ben Caradoc-Davies
<[email protected]>  wrote:

Note that WMS does not yet support any DataAccess or non-simple features.
We
have not even investigated how to use xpaths for complex properties in an
SLD.

This is precisely what I want to look into. If it's not too hard I'll
make the changes myself,

That would be excellent!

otherwise I'll roll our a simple feature equivalent of the complex
featuers that can be used
for web mapping

That is what out app-schema users do at the moment. Not pretty, but it
works. The main problem is that GetFeatureInfo gives simple data. Better
would be if GetFeatureInfo gave a complex (app-schema) WFS response.


Hmm... I don't think that is possible at all with WMS 1.1: even using the GML
output the spec says the output should be GML2.
Maybe WMS 1.3 says GML3, I don't know, but the thing is, as long as thethe WMS
spec says something about the gml version to be used you cannot go out with
an app-schema that uses a different gml version

Cheers
Andrea

-----------------------------------------------------
Ing. Andrea Aime
Senior Software Engineer

E.1 WMS Capabilities XML schema
This Annex contains the XML schema for WMS Capabilities against which service metadata from a server
compliant with this International Standard may be validated. Comments and documentation elements in the
schema are informative; in case of conflict with the main body of this International Standard the main body
takes precedence. The schemaLocation attributes are also informative.
The schema may also be found on-line at <http://schemas.opengis.net/wms/1.3.0/>.
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.opengis.net/wms"
        xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:wms="http://www.opengis.net/wms"
        xmlns:xlink="http://www.w3.org/1999/xlink"
        elementFormDefault="qualified">

<import namespace="http://www.w3.org/1999/xlink"
          schemaLocation="http://schemas.opengis.net/gml/2.1.2/xlinks.xsd"/>
......................
If I am reading this correctly, the standard is GML2 for WMS1.3 .
This also affects my plans to activate more formats for app-schema layers in the Layer Preview webpage.

It sounds like there is an existing tool somewhere to convert a complex feature to GML2, with loss of information.
Is this code available?

-- 
Tara Athan
Owner, Athan Ecological Reconciliation Services
tara_athan at alt2is.com
707-272-2115 (cell, preferred)
707-485-1198 (office)
249 W. Gobbi St. #A
Ukiah, CA 95482

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Re: [Geotools-devel] Binding DirectPosition with app-schema

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