Hi Justin, thanks for clarification. To better specify my situation, I have a collection of features (all Polygon, possibly with holes). I was only specifying the output as MultiPolygon as I wanted a single Geometry element for my output. I am travelling now and cannot explore the options you drafted, I will test and respond next week. Thanks you very much again, Martin
> Hi Martin, > > Just so I understand. You are saying that you have a feature collection > made up of multi polygons, with some attributes. And those attributes > may be different from feature to feature? I guess you have a couple of > options. > > The first would be if the set of attributes is well known and a closed > set, you can just declare a feature type in XML schema with all the > attributes, marking them as optional. Example: > > <xsd:complexType name="myType"> > <xsd:complexContent> > <xsd:extension base="gml:AbstractFeatureType"> > <xsd:sequence> > <xsd:element name="geometry" > type="gml:multiPolygonPropertyType"/> > <xsd:element name="e1" type=".." minoccurs="0"> > <xsd:element name="e2" type=".." minoccurs="0"/> > ... > </xsd:sequence> > </xsd:extension> > </xsd:complexContent> > </xsd:complexType> > > The second would be to declare a feature with some dynamic content, > using the xs:any construct. I don't know off hand exactly what this will > look like. > > The third would be to just hope that the parser can parse the attributes > dynamically. The geotools GML parser will do this in the case where the > GML document being parsed does not properly specify its schema. I > believe the OGR gml parser does this as well. > > Hope that helps. > > -Justin > > > Martin Tomko wrote: >> Hi Justin, all >> thanks for that, my mistake I did not notice that. I will give it a try, >> although in the meantime I solved the issue using some local >> workarounds. >> Now I have a different problem - I am acquiring a FeatureCollection as a >> result of some processing, where features included have some attributes. >> I need to output the Features in GML. I was using MultiPolygon for my >> needs, as ultimately the result IS a MultiPolygon. I however, don't know >> how best to handle the attributes. My understanding is that I need to >> declare a new complex XML element that will have GML geometry and any >> other attributes. The problem is that there may be different values for >> the attribute for each of the Polygons contained. Hence, it would >> probably be better to declare the geometry as a collection of Polygons >> somehow. >> Does anyone have a GML 3.1.1 example doing something like that? I find >> it incredibely difficult to find examples for GML3.1.1, and the schemas >> are much more complex then anything in GML2. >> >> Thanks >> Martin >> >> >> Justin Deoliveira wrote: >>> Nope, it does gml 3 as well, you just have to use a different >>> configuration. >>> >>> org.geotools.gml2.GMLConfiguration vs >>> org.geotools.gml3.GMLConfiguration >>> >>> -Justin >>> >>> Martin Tomko wrote: >>>> Hi Justin, >>>> thank you for the suggestion. Unfortunately, I think the parser in >>>> Geotools (as per 2.5. documentation) is only fit for GML 2.X, is >>>> that right? >>>> Thanks >>>> Martin >>>> >>>> Justin Deoliveira wrote: >>>>> Hi, >>>>> >>>>> Looks like you are running up against the property reference pattern >>>>> in GML, it is used quite extensively. I can't really comment on the >>>>> XMLBeans stuff, our GML parsing uses a different engine. If >>>>> interested here is the way you could parse a geometry: >>>>> >>>>> import org.geotools.gml3.GMLConfiguration; >>>>> import org.geotools.xml.Parser; >>>>> >>>>> GMLConfiguration gml = new GMLConfiguration(); >>>>> Parser p = new Parser(gml); >>>>> >>>>> Polygon p = (Polygon) p.parse( ... ); >>>>> >>>>> -Justin >>>>> >>>>> Martin Tomko wrote: >>>>>> Possibly a topic not fitting well to Geotools, but I thought that >>>>>> people here may know... >>>>>> >>>>>> I need to get from GML geometry to JTS geometry, and I am using >>>>>> custom XML beans generated from GML and a custom parser. It works >>>>>> fine most of the time, but today I run into a wall: I have a GML >>>>>> element in my xsd, importing GML (feature.xsd) in order tohave an >>>>>> element as follows: >>>>>> >>>>>> <xsd:element name="MyGeometry" type="gml:GeometryPropertyType" >>>>>> minOccurs="0"> >>>>>> >>>>>> When reading this element in XML beans, tI can extract the >>>>>> GeometryPropertyType gpt, and from it I can do >>>>>> AbstractGeometryType ageom = gpt.getGeometry >>>>>> I have troubles to cast from the AbstractGeometryType to a >>>>>> PolygonType (I am certain that what comes in is a polygon). >>>>>> I wonder if this is a more common problem with GML 3.1.1 ( I seem >>>>>> to have found some indications in that respect) or my problem in >>>>>> the declaration of the geometry. >>>>>> >>>>>> Thanks, and apologies if this is not the appropriate forum. >>>>>> Martin >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> >>>>>> Stay on top of everything new and different, both inside and around >>>>>> Java (TM) technology - register by April 22, and save >>>>>> $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. >>>>>> 300 plus technical and hands-on sessions. Register today. Use >>>>>> priority code J9JMT32. http://p.sf.net/sfu/p >>>>>> _______________________________________________ >>>>>> Geotools-gt2-users mailing list >>>>>> [email protected] >>>>>> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >>>>> >>>>> >>>> >>>> >>> >>> >> > > > -- > Justin Deoliveira > OpenGeo - http://opengeo.org > Enterprise support for open source geospatial. > ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
