Geography Markup Language (GML) is an OGC Standard for expressing geographical features.

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Parse GML with Openlayers

In our project we do a GET request to a WFS service. This service returns some GML. To parse this GML, we are playing with the GML parser of Openlayers. This is working as long the GML isn't ...
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Tutorials related to the transformation of building geometries from CityGML to KML/Collada?

I have some 3D building geometries in CityGML that I want to transform into KML/KMZ. Apparently the way KML works is to build the geometry in Collada and do the georeferencing in the actual KML file. ...
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Tutorials for UML/GML

Do you know any good tutorials or any resources for learning from the beginning UML and GML ? I am asking because (later) i would like to learn how to make a application schemas in context of ...
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80 views

Validate a gml file

I receive a gml-like response from a RESTful Web service. It looks good for me but I can not imported in QGIS. Is there an online validation tool for a valid gml file? Or am I missing something for ...
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1answer
100 views

Simple georeferenced 3D data format for building models

I am looking for a simple georeferenced 3D-data format to store very simple building models. Each building should be represented as a number of poylgons, semantics do not matter. It would be ideal if ...
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2answers
234 views

Remove unneeded columns from geographic data file?

I have some GML data that has some unneeded columns in it. I'd like to remove these columns in order to reduce the file size. (To clarify: I mean that the file has many points in it, and each of these ...
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225 views

FME converter from DWG to Openlayers supported format

FME converter is best software that i found till now to convert DWG to some open format vector data file supported by OpenLayers , but it got very awful convert from DWG to KML/GML it drawing ...
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1answer
443 views

How to use the OGR/GDAL configure options in QGIS python environment

I’m looking for a solution how to use the OGR/GDAL configure options (--config) in the qgis python environment. http://trac.osgeo.org/gdal/wiki/ConfigOptions Setting special configure options is ...
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443 views

OGR-Driver GML axis order handling (GDAL, QGIS)

By default the OGR-Driver will swap the axis order to longitude, latitude for geographic coordinate systems. "Since OGR 1.8.0, the GML driver has coordinate system support. This is only reported ...
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1answer
84 views

How to compose WFS GetFeature link from WMS capabilities definition?

This publication of geoinformation provides download links for GetCapabilities documents via WMS. The platform also runs a WFS service as can been seen here. I wonder if it is possbile to compose a ...
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4answers
1k views

GML Parser for C++/Java/…?

I am looking for a good parser for the latest GML (Geographic Markup Language) version in preferably: C++/Java/Ruby/... I am especially interested in reading the geometry of individual features. Does ...
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1answer
305 views

How to write GML parser with Geotools?

I wrote a Parser for a GML file from the OS Mastermap with geotools 8.4. With one part I still have a problem. This sniplet of the xsd: <complexType name="RoadLinkType"> ...
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2answers
1k views

Storing GML surface in PostGIS

I'm using PostGIS 2.0.0 and would like to store a GML Surface in a way that allows calculating intersections between that surface and various points and lines. In my case, the Surface will have one ...
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2answers
418 views

How to convert gml to geojson using Python and ogr with geometry transformation?

Does anyone have an idea how to convert gml to geojson (with attributes) using Python with ogr bindings? It should be possible to transform geometries to different coordinate system. I can not use ...
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2answers
383 views

Ordnance Survey osgb:BNG spatial reference system not recognized by PostGIS

I'm trying to load an Ordnance Survey GML file into PostGIS using the ST_GeomFromGML function. The problem is that the spatial reference system that is used in the file, osgb:BNG, is not recognized by ...
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4answers
5k views

How do I use ogr2ogr to convert a GML to shapefile in Python

I am trying to convert a GML to an ESRI shapefile using ogr2ogr utility in a python script. I have successfully installed the GDAL/OGR package via osgeo but I am now struggling to find/understand ...
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1answer
213 views

PyShp 1.2 creating Polyline from GML

I have a problem in creating some polylines in one Shapefile with PyShape. The plan is to read a GML file containing LineStrings and create a shapefile. The theory is clear, but the realworld is ...
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47 views

OpenLayers - Get LayerName from GML Response object

I am using the WMGetFeatureInfo control in OpenLayers to select items from my layers and return GML. I use this to get an attribute from the GML; var val = evt.features[0].attributes.UID; //Where ...
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137 views

Linux Tool to visualize CityGML file

I am looking for a linux program that allows me to visualize CityGML models (3D). I have tried a whole bunch so far (most of them via wine but also native ones) but I couldn't get a single one of them ...
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1answer
123 views

What is the best format to encode polygons such as lakes?

I am looking for a standard format to encode polygons, such as lakes, in one file that is easy to create and common so that others can use it in different GIS systems. Every file will contain data on ...
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0answers
41 views

Problem with taverna

I want to use taverna to call OGC WFS,and the file returned from WFS is GML, but what I want is SVG,so I have to convert GML to SVG by using taverna.The Method I used ExecuteProcess_gml2svg,which ...
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1answer
418 views

GML - Multi-geometry validation

I'm doing the test to introduce multiple geometry in a WFS service using GML. For now the simple geometry is functional, but I still have some bugs with multiple geometry. I think it may come from my ...
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250 views

GML v3 loading with OpenLayers

I rewrote the question to be more readable: I saw GML format is just a little more 'evolved' than KML. Am I right? Which format is to be considered more standard, more supported and convenient to ...
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2answers
3k views

Convert GML to GeoJSON

I have downloaded a GML file from Statistics Canada and would like to convert it into GeoJSON to use parts of it in a D3 visualization on the web. However, I did not find a converter that would do ...
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1answer
50 views

GML Simple Feature compliance test

I'm in the process of defining a GML schema from a database schema, the idea is for it to be GML simple feature compliant. However I can't find a way to confirm this compliance other than reading the ...
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1answer
550 views

Programmatic conversion between GML and GeoJSON

I am modifying a .Net (C#, MSSQL) system to add some geography that I'd like to display on a leaflet map. I had originally expected to save GeoJSON directly into text strings in the DB, but after ...
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1answer
897 views

OS Vectormap GML files into PostGIS

I am having difficulty in efficiently dealing with OS Vectormap data that comes in GML format. In the past I used the Plugin for QGIS (OS GML Tools) to batch convert folders of compressed GML (.GZ) ...
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1answer
218 views

Can I append to different tables using ogr2ogr?

I have been through many related questions and links but I am still confused as to how/if this is achievable. So, I have defined tables in my postgis database and I would like my ogr2ogr commnand to ...
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1answer
905 views

What does “Error when writing Schema: A unique destination featuretype name could not be generated for” mean?

I have a bunch of GML datasets which I need to import to Esri featureclasses. I am using the Data Interoperability extension for ArcGIS, which should support this. However when trying to import my ...
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2answers
592 views

How to create shapefile from OS MasterMap data using ArcGIS Desktop 10?

How do I create a shapefile from OS MasterMap data in Arcgis 10? I have tiles from the Ordnance Survey Site and would like to create a topomap from the existing tiles. These tiles contains the ...
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0answers
251 views

GeoServer WMS OGC-filter fails with “I dont understand the tag: gml:Polygon”

I'm trying to construct an OGC filter to pass to a WMS GetMap request to GeoServer but I can't seem to do it. The goal is to show the parts of the layer that intersects with a supplied polygon. ...
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119 views

Issue loading GML with Openlayers no obvious error

i'm newbie using openlayers, there are no error in my firebug, but, my GML can't show in my browser, what should i do? this is my GML from result of converting my shapefile with ogr2gui : ...
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58 views

How to obtain the center of Vector layer created using WFS query?

I created a vector GML layer using a WFS query with a filter. The layer renders fine . However, the layer does not appear to have any features associated with it (layer.features.length is 0 ) I need ...
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2answers
1k views

Using Python to parse an XML containing GML tags

I am trying to write a python script which pulls GML tags out of an XML file and formats them into WKT for inserting into a PostGIS database. I have been successful in doing so for an XML containing a ...
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1answer
207 views

How to modify gml using openlayers?

i have to edit GML file in openlayers but i am not able to do same. please guide me with some code if possible. i also have to save edited data to hard disk using openlayers Thanks for any help.... ...
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619 views

What is the best way to convert WKT String to GML String

What is the best way to programatically convert WKT String to GML String? Every reasonable library (at best available in some Maven repository) can be used. Till now I came up with this solution ...
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3answers
4k views

How to write GML with Geotools?

I'd like to write GML using Geotools. Unfortunately, I can't find documentation on a GML Writer (except for this one from 2006: http://docs.codehaus.org/display/GEOTOOLS/WFS+++GML+DataStore). Could ...
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0answers
216 views

PostGIS 2.0 st_geomfromgml using LineString fails with invalid GML representation

I am attempting to insert a geometry into a table using the st_geomfromgml function. The GML is being sourced from a Geoserver WFS request. The function call looks like this ...
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1answer
290 views

How to convert WFS request to GML

I have the following: var popProto = new OpenLayers.Protocol.WFS({ url: WFS_HOST, version: "1.1.0", featureType: layerName, featureNS: namespace, srsName: "EPSG:4326", ...
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2answers
158 views

postgis st_geomfromgml error on point

In PostGIS 2.0 I try: select ST_GeomFromGML( '<gml:Point srsName="urn:ogc:def:crs:EPSG::28992"> <gml:pos>275466.0 565559.0 0.0</gml:pos> </gml:Point>'); This ...
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1answer
467 views

How to debug ogr2ogr ERROR 1: Did not get at least 2 values or invalid number of set of coordinates?

I'm trying to convert a government data contour GML (http://geo.data.linz.gv.at/katalog/geodata/hoehenschichten/2011/1m-Hoehenschichten.gml) to Shapefile. It seems like it was created by FME: ...
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2answers
419 views

Applicable OpenLayers settings for WFS layer

I am trying to display a WFS layer on an OpenLayers map. Here are the appropriate portions of GETCAPABILITIES response. <ows:Operation name="GetFeature"> <ows:DCP> <ows:HTTP> ...
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1answer
376 views

WFS Layer in OpenLayers queries server for data but doesn't display the data

I have added a WFS layer to a map and can see (using Fiddler) a request being made to the server for the layer data. The server uses GML as the data format and the data being returned is valid. ...
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5answers
3k views

GML, KML, GeoJSON - Speed rendering 3109 polygons?

I am working with Geoserver, serving U.S. Lower 48 counties to openlayers (3109 polygons - lots more vertices). The counties are loaded into a postgis database. I am curious about developer ...
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384 views

How to couple GeoTools GML bindings for encoding to GML 3.1.1

I've successfully created GeoTools (8.3) bindings for parsing and encoding XML bindings as described in their tutorial: http://docs.geotools.org/latest/userguide/library/xml/internal/bindings.html I ...
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1answer
240 views

How can I get KML into JTS TestBuilder?

JTS Topology Suite TestBuilder supports WKT, WKB and GML inputs. What's a quick and easy way to get the geometry for a KML feature into one of these formats for input into JTS TestBuilder? For ...
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1answer
346 views

how can i render geojson format and gml format?

I can show wms png format my map but i didnt render jeojson and gml format by the way my url is correct service. İn additonal i used same code in my local and i can render local geoserver . plz show ...
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2answers
4k views

How to convert GML Surface to SHP Using OGR?

I have a very large .gml file with multiple layers in it. I would like to export one of these layers to .shp. It is a polygon layer (of lakes). However, I am getting the error: ERROR 1: ...
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1answer
479 views

Is it possible to have self intersecting polygons in GML or shapefile?

GIS vector data for example GML or shapefile contains polygonal data. Lets assume, we have polygon A which has self-intersection which means that the edges in this polygon intersect with each other. ...
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1answer
614 views

GML and GeoJSON vector layer can not display in Firefox and Chrome

I have following codes. It works perfectly in IE (GML and GeoJSON vector layer was loaded), but not in Firefox and Chrome without any errors noticed. Please help me to fix this problem. Here is the ...