Questions tagged [gml]
Geography Markup Language (GML) is an OGC Standard for expressing geographical features.
269
questions
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131 views
How to correctly assign (apply) XSD schema to GML using ogr2ogr?
My task is to convert data from ESRI fileGDB to single GML, applying certain XSD schema (a kind of state standard). So, I used OSGeo4W Shell to write the following command:
ogr2ogr -f "GML" -oo ...
0
votes
0answers
22 views
Reading features from GML OL3
I am trying to read features with ol.format.GML (using OL3).
As a result I get feature but not it's geometry.
GML file looks like this:
var gmlString = '<?xml version="1.0" encoding="utf-8" ?>
&...
0
votes
0answers
33 views
OpenLayer Impossible to load GML file with ESPG:3947
I try to load my gml file with this code but it doesn't work. Did I forgot something ?
import Map from 'ol/Map'
import Layer_Tile from 'ol/layer/Tile'
import source_OSM from 'ol/source/OSM'
import ...
0
votes
0answers
34 views
Impossible to display my GML file
I would like to display my GML file but I don't understand why nothing appear in the map:
code:
import Map from 'ol/Map'
import Layer_Tile from 'ol/layer/Tile'
import source_OSM from 'ol/source/...
0
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0answers
39 views
Convert list of GML coordinates into WKT
I am working with a NetCDF file. One of the attributes of the file is its footprint given as just a list of GML coordinates e.g.
#ncds is a netCDF dataset
>>> ncds['METADATA/EOP_METADATA/om:...
1
vote
0answers
29 views
GML file provides wrong coordinate system
I have the following field 51A.
It is described by the following GML excerpt:
<gml:featureMember>
<ogr:av_export_temp.ihkulroo fid="av_export_temp.ihkulroo.183">
<ogr:...
0
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0answers
28 views
Why a rectangle area is described as a 13-point polygon in a GML file?
I have the following field called 51A:
I have the following excerpt from the GML file where it describes the 51A field:
<gml:featureMember>
<ogr:av_export_temp.ihkulroo fid="...
0
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0answers
11 views
posList conversion to area in square meters
I have the following GML where I would like to place these coordinates on a map and calculate the square meters of the polygon.
I am completely at loss here as I do not know where to begin. Any ...
0
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0answers
35 views
How do I join an area that has been split into many .dwg or .gml files?
How do I merge a bunch of adjacent (1) dwg or (2) gml files into a continuous map using free software or online? Thanks.
0
votes
1answer
68 views
How to use GDAL /vsizip/ to access GML file(s) from Sentinel-2 zip package
Which is the correct way to write the path through the *.Zip S2 imagery package to rich the *.GML vector file(s) ?
Does someone knows how to correctly write the path to *.GML file for using it with /...
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0answers
33 views
Making map with Python from FGDB or GML or GPX or PostGIS or SOSI and TIFF files
I am a complete beginner in GIS domain and I would say intermediate level with Python. I would like to use Python to plot a simple map displaying the hiking trails of Norway to prepare my future ...
0
votes
1answer
56 views
GeoServer Application Schema GML output without geometry
I am working on an Application Schema example. The dataset is being built, the layer will be rendered as WMS, but the WFS-GML Output produces an empty tag where a Point geometry would be expected.
I ...
0
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0answers
39 views
Error in parsing GML using Java
Error while parsing GML throws an error like following
org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.VerifyError: Bad type on operand ...
0
votes
0answers
40 views
Unable to find the exact packages for org.geotools
The following imports did'nt works for me
import org.geotools.wfs.GML;
import org.geotools.wfs.GML.Version;
Find the screenshot from my Eclipse IDE
IDE is telling me "The import org.geotools.wfs....
2
votes
1answer
241 views
Read GML using Java
I have a use case on reading and extracting data from GML (Geography Markup Language) using Java. There is a sample file in GitHub by clicking here.
The imported packages in Java were as follows
...
1
vote
1answer
39 views
prevent ogr2ogr from generating new fid attribute field
I am exporting data from PostGIS to gml using python script with ogr2ogr. But the output generates unwanted new field "fid" that contains the following string: "sql_statement.0" , "sql_statement.1", ....
1
vote
1answer
42 views
GeoTools GML parser sorted features collection
I am using the following code to parse GML file in java:
File gmlFile = new File("path/to/gml/file");
InputStream gmlInStream = new FileInputStream(gmlFile);
GML gml = new GML(Version.WFS1_0);
...
0
votes
0answers
31 views
WFS 2.0 with get request outputformat gml3 returns body using wfs 1.1.0 schema, is this expected?
I am making GET requests against a wfs service specifying version 2.0, when I do not specify an outputformat in the request it returns a body using the schema namespace for wfs 2.0 (wfs:), when I ...
2
votes
2answers
35 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
74 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
122 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
38 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
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0answers
33 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
39 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:...
2
votes
0answers
43 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
311 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
173 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 ...
1
vote
1answer
46 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
88 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
218 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
67 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
76 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/...
1
vote
0answers
88 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=${...
2
votes
2answers
866 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 ...
2
votes
1answer
4k 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
58 views
Seeking Open source Tools for GML in ArcGIS and gvSIG?
Iām 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
1answer
322 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 ...
3
votes
1answer
711 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
604 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
244 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
141 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
470 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
540 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
107 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
241 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
200 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
193 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
640 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
2answers
951 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
607 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 ...
