Questions tagged [gml]
Geography Markup Language (GML) is an OGC Standard for expressing geographical features.
255
questions
2
votes
2answers
28 views
Feature becomes invalid when reading through WFS/GML in GeoServer [duplicate]
I'm working with the TIGER shapefiles, specifically the Tract layer, and my I'm trying to read selected features via WFS using GeoServer, then save those to a new layer. However, when the shapes come ...
1
vote
1answer
28 views
Display the gml:id of WFS layer as an attribute in QGIS
I have loaded a WFS layer in QGIS and want to display the gml:id of the features in the attribute table. Is this somehow possible?
I can see the gml:ids in other applications (ex FME).
0
votes
1answer
48 views
OGR2OGR - converting a GML file to GeoJSON
I'm struggling to use ogr2ogr to convert a GML file into a GeoJSON file. My input is zipped GML files with several layers. I'm only interested in the layer with name 'TopographicArea'.
I've tried ...
1
vote
0answers
28 views
How to show Turn Restriction data from OS MasterMap Highways on the map?
I want to obtain the location and details of all turn restrictions from the OS MasterMap Highway Network datasets I have.
I tried loading the Turn Restriction dataset into QGIS but it does not read ...
0
votes
0answers
27 views
Encoding non-mandatory feature properties in WFS/GML?
In what ways can non-mandatory feature properties be encoded in feature type schema (WFS 2.0/GML 3.2.1 with GML features)?
3
votes
1answer
28 views
Understanding GML structure for validation
I'm failing to convert this GML v3.2 XML and I'm not sure why:
<?xml version="1.0" encoding="UTF-8"?>
<gml:MultiGeometry xmlns:gml="http://www.opengis.net/gml" srsName="">
<gml:...
1
vote
0answers
37 views
Topology Error building polygon
I retrieve a response from the wfs_gnde from BKG in Germany using the following URL and request.
http : // sg.geodatenzentrum.de / wfs_gnde
<GetFeature
version='1.1.0'
service='WFS'
...
4
votes
3answers
219 views
Trying to import Dutch Infrastructure GML using OGR GMLAS driver, but no geometries?
I have some Dutch Infrastructure GML files that I'm trying to display in GeoServer. Step 1 is to import the GML into PostGIS and while I can make it work using the OGR GML driver, I end up with a ...
1
vote
0answers
80 views
GML file converted to ESRI shapefile with ogr2ogr missing spatial reference information
I am trying to convert Sentinel-2 cloud masks from GML format to ESRI shapefiles. I have managed to use ogr2ogr in a python script as described in the answer to Using ogr2ogr to convert GML to ...
0
votes
0answers
56 views
Spatial intersection of features (Oracle Spatial) with a line stored in a local gml file?
Interesting sites are stored as polygon features are stored in an Oracle Spatial read only dB.
I have a local GML file containing a line (EPSG:31370 - corresponding to a trajectory over a couple of ...
1
vote
1answer
41 views
Changing name of file download from browser app?
I am developing browser application using MapServer and JavaScript. I've got part where on map click I get FeatureInfo about an object:
function getFeatureInfoGML(map){
var openwindowhandle=...
0
votes
0answers
68 views
How do I search for features within another feature using WFS OGC
I understand I can write a GML query like this...
<wfs:GetFeature xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/wfs http://giswebservices....
3
votes
3answers
138 views
GML validation errors with FME
I am wondering if I am missing something.
I am exporting some records from an Oracle dB to a GML2 file using FME.
When I validate the resulting XML using online validators I don't find any errors.
...
2
votes
1answer
53 views
gdalwarp - correct for a slight spatial misregistration?
Some Sentinel-2B band images have slight spatial misalignments as I explained on the step forum.
https://forum.step.esa.int/t/sentinel-2-tci-10m-level-2-images-slight-spatial-misregistrations/14235
...
1
vote
1answer
52 views
How can I determine the original spatial reference system of GML coordinates when I have their WGS84 equivalent but no EPSG?
I am querying out spatial information from a SQL database that stores locations that users input on a map as GML snippets. See below for an example:
<gml:Point xmlns:gml="http://www.opengis.net/...
0
votes
0answers
49 views
I can not Add GML Layer in OpenLayers 4
I use openlayers 4 and gml layer is file type, but when i add gml layer to map using ol4, i have a ploblem. Gml is polygon but it appear as some point in map.
Can not anybody help me?
Below is my ...
1
vote
0answers
65 views
No geometry when importing 3D building model GML into PostGIS
I'm attempting to import a GML file containing 3D building models into PostGIS using ogr2ogr.
ogr2ogr -f PostgreSQL PG:"host=${hostname} port=${port} dbname=${db} \
user=${user} password=${...
0
votes
1answer
328 views
Open with QGIS a GML file (INSPIRE schema) created with hale studio
I'm trying to export in gml the transformed data of "Basic hydrography example" of hale studio and to add the file in QGIS, using the plugin GML application schema toolbox. The GML exported should be ...
1
vote
1answer
1k views
What is a GML file?
I am writing some training notes for new QGIS users at my work.
I have a section on types of vector files; ESRI Shapefile, MapInfo Tab and GML & GZ so far.
We sometimes use the UK Land Registry ...
0
votes
1answer
45 views
Seeking Open source Tools for GML in ArcGIS and gvSIG?
I’m searching open source tools for ArcGIS Desktop 10.5 and gvSIG 2.4 to load and write complex GML data for example INSPIRE GML.
I have not the possibility to install interoperability or INSPIRE ...
0
votes
0answers
32 views
Selecting multipatch features in multiple .gml datasets and exporting them as a shapefile
I have hundreds of .gml datasets containing multipatch feature classes that I want to export as shapefiles to a folder. The problem is that none of the List Functions can read them in .gml datasets. ...
0
votes
1answer
225 views
Openlayers - parse WFS features to create Attribute Table
I am trying to parse this WFS to create an Attribute Table with HTML having the fields as headers and their values as attributes.
I saved the GetFeature response in a variable (features) which I'd ...
2
votes
1answer
434 views
Using ogr2ogr to convert multiple GML files to a postgis table
I have a folder with 150 .gml (addressbase) files I need to upload to my postGIS/postgres database. After the first gml is uploaded, the rest will be appended to it to form a single table. However I ...
1
vote
0answers
396 views
Reading data to geopandas using WFS - GML format
This relates to the question here:
Reading data to geopandas using WFS?
Is there a way to to do the same with a service that does not supply the data in GeoJSON format, but in GML-format?
The ...
0
votes
1answer
136 views
Edit and transform XML/GML files
I'm searching for an approach as someone who just started to work with geodata recently.
It's about the following situation: I received several XML files. I need to perform a geometric difference ...
0
votes
1answer
104 views
Batch convertion of .tab files to a single .gml using ogr2ogr
My task is to convert .tab files from a directory (C:\Users\Vadim\Downloads\vec\MapInfo\snp) to a single GML file (snp.gml).
I use OSGeo4w Shell.
So I wrote a following command:
ogr2ogr -f "GML" C:\...
0
votes
1answer
275 views
GML axis order problem in QGIS
Is there any reason why QGIS swap axis order if CRS (EPSG:3908) is defined inside GML, for example:
<au:geometry>
<gml:MultiSurface gml:id="_42d05737-123d-4a52-a655-aef968cd9511" srsName=...
0
votes
1answer
386 views
readFeatures from GML in OpenLayers4
I have an XML data. I simply need to get coordinates of a feature from XML to zoom the map on it.
But when I try to read it I get nothing. What am I doing wrong? Have any idea?
//got a text from a ...
1
vote
2answers
98 views
Issue with FEMA OGC Web Feature Service returning HTTP 400 error when attempting to download GML file
I'm trying to use an OGC web feature service in some software I am involved in developing. The service is described at the bottom of this page: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS
...
2
votes
1answer
162 views
Geoserver - PostGIS : WFS-Transaction update exception error-Parsing failed for Point:
I tried to perform a transaction update, but it failed with this exception message:
<owsExceptionReport.xsd">
<ows:Exception exceptionCode="NoApplicableCode">
<ows:...
1
vote
1answer
172 views
Transform complex features into simple features GML with HALE
Background information:
I'm working with complex GML features and would like to publish my data as a WFS service through GeoServer. I know there is already the application schema support (app-schema) ...
1
vote
1answer
137 views
GeoTools: Encode into GML 3 not working
I want to use GeoTools to convert collection of SimpleFeature objects to GML 3.2.1 geometry.
However, I'm dealing with this:
Creation of XSD works with both GML 2 and 3.
Creation of GML works only ...
2
votes
0answers
491 views
GML/SVG for indoor map in OpenLayers 4?
I am new to GIS world and trying to incorporate OpenLayers with GML or SVG.
I am building a map engine and one of the features should be support of indoor maps. It can be accomplished with a static ...
1
vote
1answer
620 views
WFS filter for property name
I need help with WFS filtering for GML. I want to filter only by one property (name of administrative unit) - that is all.
Lets say I would like to get the second member of this GML:
http://services....
0
votes
1answer
425 views
Adding all polygons in GML from MapServer to openlayers using WFS
I want to show the contents from MapServer (returned as GML given below) as WFS layer in OpenLayers map (OpenLayers v5.0.0). The problem is that only one polygon is added to the map. Here is the code ...
1
vote
0answers
89 views
Transform GML to Geometry (PostGIS) in GeoKettle
How can I transform GML (saved in XML file) to Geometry type?
I've noticed function 'Geometry from GML' in Calculator but it needs string value with GML. Is there any way to extract it from XML file?...
1
vote
1answer
109 views
Geoserver WFS Feature Schema Enumeration of Strings
Basically, I'm trying to limit the values that can be provided by a WFS transaction. So the original schema I've got for this simple test feature here
<xsd:complexType name="secondfeatureType">
...
0
votes
1answer
73 views
Why can't I load a WFS into Openlayers: “TypeError: null is not an object (evaluating 'Ob(d).b')”
I am teaching myself the use of Services (WFS) in and OpenLayers itself. As far as I know I managed to get a proper gml-file (GML2, I hope [EDIT: It is GML 3.1, I figured]) from a governmental server ...
1
vote
0answers
198 views
OpenLayers WFS service with GML
I'm trying to get features from WFS service, this service using stored queries. I've managed to retrieve data both with axios and XMLHttpRequest. But the problem in the reading features and showing ...
2
votes
0answers
51 views
Software support for GML 3.3 Linear Referencing?
Are you aware of any software supporting import/export of Linear Referencing data in GML version 3.3 format?
Apparently no software application, proprietary or FOSS, currently supports it explicitly. ...
-1
votes
2answers
338 views
How to assign .xsd for ogr2ogr
GMLAS link:
http://www.gdal.org/drv_gmlas.html
I want to convert my gml file to shapefiles. But our gml files was created by custom gml schema. We have their application schema, xsd. But i don't know ...
1
vote
0answers
94 views
GML of geostationary satellite projection
I'm trying to convert geostationary satellite projection from Proj4 string to GML with GDAL.
I use this Proj4 string:
+proj=geos +lon_0=104.5 +h=35785865.7741 +x_0=0 +y_0=0 +a=6378160 +b=6356775 +...
0
votes
0answers
37 views
Converting Personal geodatabase to GML format using ArcGIS Desktop? [duplicate]
I am working on ArcGIS 10.3.
Does anyone know how to convert a personal geodatabase into a GML format?
1
vote
2answers
78 views
Geometry not showing when importing Dutch BRT-files (GML)
After importing a couple of gml files (Dutch BRT-files) into QGIS I noticed that some of the layers didn't seem to contain any geometry, the database (attribute table) is there, but no geometry is ...
1
vote
3answers
883 views
Reading GML features in OpenLayers 4?
I use OpenLayers 4.6 and I want to read a feature from GML string. The GML looks like:
<?xml version="1.0" encoding="UTF-8"?>
<gml:Polygon xmlns:gml="http://www.opengis.net/gml"
xmlns:...
1
vote
1answer
193 views
GeoTools includes repeated prefix in GML output
When attempting to write out GML encoded features that were originally collected using the Geotools WFS plugin (gt-wfs-ng), it looks like the GML output is incorrectly duplicating the feature's prefix ...
3
votes
1answer
632 views
Convert gml to raster in QGIS
I have a dataset of type citygml (*.gml). It includes information about buildings and their rooftypes.
you can find a sample file here: https://www.opengeodata.nrw.de/produkte/geobasis/3d-gm/3d-...
1
vote
0answers
41 views
WFS in OpenLayers4 returns data but doesn't display any [duplicate]
I can't get this WFS to work.
I tried to stick to the OL-WFS examples - no luck.
let vectorLayer = new ol.source.Vector({
format: new ol.format.GML(),
url: function(extent) {
return 'https://...
0
votes
0answers
365 views
Error: The requested Style can not be used with this layer
I'm trying to calculate the area of a polygon using the code from this page and I'm getting the following error
The requested Style can not be used with this layer. The style specifies an ...
1
vote
3answers
143 views
Getting writer in FME to output as appointed filetype while using FilenamePartExtractor?
My goal is to merge all shapefiles in the same folder and outputting them as a gml with name of the folder.
So it looks like this:
Main Dir
Set1
roads.shp
buildings.shp
Set 2
roads.shp
...
I ...
