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

learn more… | top users | synonyms

2
votes
1answer
716 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 ...
3
votes
1answer
492 views

OSS java approach to convert Shapefile to GML

We've got a project coming up where we need to upload .zip of a shapefile, join the .dbf to some lookup tables, join to other tables also uploaded (one to many attributes for each feature), and ...
8
votes
4answers
6k 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 ...
4
votes
1answer
609 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 ...
0
votes
1answer
319 views

Does a polygon in a layer intersect with another polygon in the same layer [closed]

I am a CS major with little experience in GIS. I am working on vector polygon overlay. Looking at GML and shapefile data, I realized that a map is made up of a large number of polygons. Does a polygon ...
4
votes
1answer
661 views

Why are the polygons in my GML not rendered?

I tried to view GML files from download services ( http://services.cuzk.cz/gml/inspire/cp/epsg-5514/ ) and I have a problem with viewing of polygons from layer "CP:CadastralParcel". This Layer ...
1
vote
1answer
363 views

How can I import geometries from an invalid GML quickly?

I have the following gml geometry : <gml:Polygon xmlns:gml="http://www.opengis.net/gml" srsName="EPSG:2154"> <gml:exterior> <gml:LinearRing> <gml:posList ...
1
vote
1answer
736 views

Converting a shp file to a list of latitudes and longitudes

I have a shp file with the latitudes and longitudes for the boundaries for various geographic regions. I'd like to convert the shp file into lists of just latitudes and longitudes for the regions. ...
1
vote
1answer
465 views

How to convert a CompositeCurve to a NetTopologySuite MultiLineString?

I would like to use NetTopologySuite to convert a CompositeCurve to a MultiLineString. I would like to find some code which shows how to convert this to a MultiLineString: <gml:CompositeCurve ...
1
vote
1answer
386 views

Can use of GML Simple Features profile by Web Feature Service (WFS) be advertised?

The ArcGIS 10.1 documentation on Working with WFS services says: The GML Simple Features profile is recommended for use with ArcGIS and is the basis for WFS support in ArcGIS. Is there an easy ...
4
votes
8answers
5k views

How to get OS Mastermap data into QGIS?

I have been tasked with getting OS Mastermap topography data into QGIS system to compliment our other map layers. The data comes in .gz format. Which I am told needs to be decompressed before I can do ...
2
votes
1answer
337 views

Service URL for Web Feature Service (WFS) using GML Simple Features profile?

Does anyone know of an "almost always available" Service URL for a Web Feature Service (WFS) using GML Simple Features profile? I'm keen to test WFS client capabilities without having to configure a ...
5
votes
1answer
323 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", ...
2
votes
3answers
1k views

How to merge several GML files into one

I have a folder of GML files that I want to be able to merge to create one GML file that I can then view. I have tried this using the code described but searching for GML in this website without ...
3
votes
1answer
658 views

PostGIS: ST_Transform function conversion problem

I'm inserting map data from a GML file with srid EPSG:27700 into a PostGIS database table with srid EPSG:4326. I'm using the ST_Transform function as in this snippet: ...
2
votes
2answers
433 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 ...
1
vote
3answers
577 views

How can I translate a GML definition of SRS to a usual format (e.g. WKT or PROJ.4)?

From GDAL 1.9.0 a new utility is available: gdalsrsinfo. Although it can yield an XML (GML-based) definition from a source equivalent format or file, it seems that it can only read usual GDAL/OGR ...
3
votes
1answer
439 views

Python: shp file to GML using OGR

I am trying to convert a shapefile to GML 3.1.1 . I am using gdal 1.9.1 however the GML conversion it generates for a geometry feature is GML 2 and it also swaps the long/latitude coordinates. Are ...
1
vote
2answers
171 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 ...
1
vote
1answer
1k views

OpenLayers.Format.GML parser problem

I'm trying to parse WFS reponse using OpenLayers.Format.GML parser. However, an exception thrown in my try-catch block is TypeError: a is undefined. Any pointers as to what I may be doing wrong will ...
1
vote
2answers
2k views

How to batch convert Shapefiles to GMLs?

I know how to do this within Quantum GIS but I have 30+ shapefiles that need to be converted to GML. Is there a Python script sample or plugin for Quantum GIS that I can use to convert my shapefiles ...
5
votes
3answers
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 ...
1
vote
1answer
679 views

How does ArcGIS Desktop recognize WMS CRS?

I'm using ArcGIS Desktop 10 and working on a WMS service with Mars data. Currently the GetCapabilities shows <SRS>EPSG:4326</SRS>. I assume ArcGIS 10 reads this and therefore the WMS has ...
1
vote
0answers
243 views

PostGIS reports invalid Curve GML

PostGIS version POSTGIS="1.5.3" GEOS="3.3.1-CAPI-1.7.1" PROJ="Rel. 4.7.1, 23 September 2009" LIBXML="2.7.3" USE_STATS Postgresql version PostgreSQL 9.1.2 I'm having issues inserting Curves into a ...
4
votes
2answers
5k views

WFS Request Layer (GML) with Filter

Is there a solution to request the GML layer from Geoserver with filter like using bbox: http://localhost:8080/geoserver/tiger/ows?service=WFS&version=1.0.0 ...
2
votes
1answer
534 views

How to add more than one xml file per layer

I'm using this code to add xml (osm relations) files to my map. osm_layer = new OpenLayers.Layer.GML("Polygon", relation.xml, { format: OpenLayers.Format.OSM, style: {strokeColor: "blue"}, ...
4
votes
0answers
316 views

Can GeoTools parse GML CRS definitions?

A kind of branching of this question. Soon I will need to handle GML Coordinate Reference Sysyem definitions in a Java servlet. Links: GML OGC reference. Concrete example. I know that GeoTools ...
1
vote
1answer
1k views

Anyone try generating C# classes from http://schemas.opengis.net?

I'd like to generate gml/wfs/wms classes from the OGC schemas. Using xsd2code I receive numerous errors, one of them being "Invalid particle derivation by restriction". I'm curious is anyone has ...
2
votes
1answer
444 views

OpenLayers WPS function fails in IE

I am making a WPS call in OpenLayers which works successfully in Chrome and Firefox but not in IE9. The response from IE tells me "Process failed during execution\nCould not convert to target type ...
8
votes
2answers
3k views

Why can't I edit KML/GML layers?

Newbie here confused by my first experience in QGIS I have a handful of lines defining a bike route. Originally they were saved in a .gml file and later translated into .kml so they could be viewed ...
10
votes
3answers
408 views

What does it mean “GML is an XML grammar”?

I'm trying to get my head around the theoretical side of XML and GML. The OGC web page for GML states that: The Geography Markup Language (GML) is an XML grammar for expressing geographical ...
4
votes
1answer
617 views

Is there an XML equivalent to GeoJSON?

In my web application, I am retrieving geospatial data from a server backend (Java) to the browser frontend (JavaScript). I am considering two options of how to serialize the data in this ...
1
vote
1answer
616 views

OpenLayers GML Polygon Performance

I'm working on a project where we have a large number of very detailed polygons being displayed on a image using Openlayers. The polygons are added to the map through a GML feed. We are having end ...
2
votes
1answer
958 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 ...
3
votes
2answers
8k views

How do I convert GML to ESRI featureclasses?

I have a series of xml files containing gml tags such as : <gml:posList srsDimension="2">454780.3125 525867.9375 454762.0625 525994.5625 and I need to convert these into esri featureclasses. ...
1
vote
3answers
212 views

Looking for large GML files containing vector polygon data

I have few vector data files with 500 to 700 MB GML files. But I am looking for files larger than these preferably 1 GB, 2 GB. It would be helpful if somebody can provide some pointers regarding the ...
4
votes
4answers
651 views

Looking for web and desktop tools with GML support

I am a graduate student and a novice in GIS field. I have few GML files that contain vector polygon data and I want to see them in a map format. The problem is that I do not have access to ...
1
vote
1answer
642 views

How to update GML layer without reloading local file?

I set up a GML layer with local GeoJSON file as data source: veclayer = new OpenLayers.Layer.GML("vector", "localfile.json", { format: OpenLayers.Format.GeoJSON, strategies: [new ...
9
votes
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 ...
3
votes
1answer
332 views

How to show one to many relationships in GML from GeoServer/Postgis?

I am just figuring out how to use GeoServer and Postgis. I am using the States.shp example that came with GeoServer, and I have uploaded that into a table into the Postgis database. I have created a ...
10
votes
2answers
1k views

Why does one part of GML -> KML conversion not work on Google Maps?

Brand new to all of this, not even sure this is the right forum to ask in... I have a client who wants to visualise cancer incidence and mortality rates by local/unitary authority across Great ...
-2
votes
2answers
2k views

Why is my JSON not appearing on my webpage?

Greetings lovers of GIS, I came across this error whilst doing my JSON file. "Error in loading GML file" Everything works fine in localhost but dramatically wrong in my server. Any helping hands? ...
3
votes
1answer
290 views

Polygon Shared Boundaries in GML

Last week I was told on a phone conference that GML supports shared boundaries in Polygon's. I have been unable to find any documenatation to substantiate the claim. Here is the situation: I have a ...
7
votes
3answers
4k views

How to import/export geographic information (gml or csv file) to geodatabase?

I am searching for C#/Java libraries that can import and export geographic information (gml/csv file formats) from and to geodatabases. If not yet available, is there other way to do this task? Any ...
1
vote
0answers
99 views

Getting started with storing LoST and GML searching

I am working on a logging and search database application. The application will receive event records containing XML LoST values (RFC5222 Location-To-Service-Translation). These records will be ...
5
votes
1answer
350 views

Experience with Geoserver's GML Extension

I'd like to know if Geoserver's GML extension works (well) with GeoServer 2.1-RC2 and whether it will enable uploading of GML files via REST API.
4
votes
0answers
627 views

Why doesn't the gml 3.1.1 schema validate with xmllint?

Running xmllint on the gml 3.1.1 schema fails, even though the release notes claim that this release was created to get the schema to validate using 'common tools'. There's questions about this on ...
0
votes
1answer
198 views

In what form should make requests to geoserver gml file from javascript?

In what form should make requests to geoserver gml file from javascript?. I have made this question, but neither on nor XMLRequest jquery and have downloaded some of geoserver, geoserver values ...
2
votes
4answers
1k views

How do algorithms load pieces of maps?

If the user moves the mouse pointer to the top left corner of the screen, I want my software to auto-load the three tiles that are closest to the mouse pointer. My assumptions are that the smaller are ...
12
votes
6answers
2k views

What's an efficient way of detecting road junctions on a map?

I may receive maps from any source for my project, and for the C++ algorithm I'm making, it's imperative for the algorithm to know where road junctions (nodes where more than two road segments meet) ...