Geographic Information Systems

Questions tagged [citygml]

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An open data model and XML-based format for the storage and exchange of virtual 3D city model

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How to seperate geometry surface shapefile to roof, wall and ground surface?

The output of this is to visualize the roof, wall and ground shape file in 3D with a house like shape rather than just flat combined surface geometry. The data source is geometry.surface from a ...
2
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0answers
37 views

Combining DEM, GeoTiff and CityGML in QGIS

I'm trying to combine DEM, GeoTiff, and CityGML in QGIS to create a 3D representation like in this example. The problem I have is that:- The CityGML buildings are hovering above the 3D view and The ...
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1answer
55 views

How to convert CityGML (LoD2) to Digital Surface Model?

I'm very new to GIS and doing this for a university project. For evaluating Solar Potentials on Building Roofs I want to use QGIS 3 (the UMEP Plugin, with SEBE tool). Amongst other data I need a ...
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22 views

Bring buildings from one CityGML-dataset to same planar level

I need an idea of how to bring the buildings of a raw CityGML-dataset to one planar level. What I can is writing a javascript, which goes through the xml and substract the relevant heights but... ...
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24 views

Access Z values of GML features in QGIS

I want to extract the Z values of polygons from a GML file with a python script. I can't use the field calculator, since you can't edit GML files in QGIS. Ideally, I want to extract the Z values from ...
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1answer
118 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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1answer
289 views

Build CityGML Buildings from OBJ files of OpenDroneMap

I have .obj 3D mesh files after running OpenDroneMap on Drone Images. I want to convert them to CityGML buildings so that I can put them on Cesium Globe. How can I do this?
4
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1answer
686 views

Visualizing LOD2/citygml in QGIS

I`d like to find out if and how it is possible to visualize LoD2 data (source:https://www.opengeodata.nrw.de/produkte/geobasis/3d-gm/) in QGIS 3.4/Madeira. So far I managed to load them into the ...
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3answers
145 views

Impossible to export a 3D city models as KML tiles

I want to display 3D city models, stored in a CityGML file, in a Cesium Virtual Globe. I used the software "3D City Database Importer/Exporter" to store this data in a PostGreSQL/PostGIS database. ...
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1answer
176 views

Seeking CityGML Viewer for big data? [closed]

Could you suggest a solution to view CityGML data which is about 1.36GB? I tried in fzk viewer and fme data inspector, it is very slow.
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1answer
120 views

Free CityGML Editor for tag edit

I can view CityGML File in FZKViewer but is there any tool available that allow me to edit cityGML file? I can easily open cityGML in notepad or notepad++ but its code/tag syntax is not highlighting ...
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69 views

Controlling CityGML performance?

I tried to convert single LOD3 building using FME. I am able to convert successfully from DGN to cityGML format.But when I tried to view the same in FZKViewer/FME data inspector the performance is ...
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2answers
350 views

Building footprint polygon from LoD1 CityGML 2.0 using R and sf?

I have LoD1 building data from a federal agency in Germany in the CityGML format. I would like to import and strip the data into R to get only the footprint of the buildings and an attribut about the ...
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1answer
125 views

3DCityDB Export not working

I'm working with some CityGML models within 3DCityDB. For visualization purposes I now want to export some of my buildings to KML with the exporter tool. When I draw the bounding box over my area of ...
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281 views

Null geometries when importing CityGML data into ArcMap and QGis

I am looking to convert a CityGML file into a shapefile to perform some spatial analysis on it. I am completely new to the CityGML format and keep running into issues when trying to import them in ...
3
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1answer
984 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-...
2
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1answer
1k views

Load LoD2 files into QGIS

is it possible to load the geometry of LoD2 files in CityGML format (gml:LinearRing from bldg:GroundSurface) as GML layer in QGIS? Here is an example content of a citygml file: <?xml version="...
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914 views

Convert CityGML

I get CityGML Data from an OpenData Portal of a German Federal State. Unfortunately I only have a Basic ArcGIS License, so I can't work with the Data Interoperability Extension. I'm fine in working ...
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1answer
287 views

Extract polygon-coordinates from citygml data using citygml4j

My question is closely related to Extract geometry from citygml data using citygml4j I have a citygml file with buildings and I need to extract the coordinates of each roof surface. I use the open ...
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1answer
216 views

solar potential analysis of 3d city model [closed]

I am looking for a free application/tool/plug-in to conduct solar potential/irradiation analysis on a 3D city model. My intention is to know how much solar energy is delivered onto the rooftops and ...
2
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0answers
801 views

Import 3d buildings into Cesium

I have many buildings in CityGML format. Currently cesium does not parse citygml. I tried Geojson and KML formats as in Cesium official tutorials using Sandcastle. In geojson buildings can be seen ...
2
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1answer
4k views

Viewing CityGML in QGIS

I'm using QGIS 2.18 (Las Palmas) I received Data from a client in citygml-Format. The only Programm I have is QGIS and i have tried everything to open it. It only shows me 13 of 72 Objects of the ...
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1answer
1k views

Parsing CityGML with PyXB

I'm trying to parse a CityGML file in python in order to generate python objects from the buildings. Optimally the objects would have attributes corresponding to the elements in the GML, more or less ...
2
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1answer
240 views

Generating regular points on 3d polygon surface?

I have some CityGML buildings and I imported them into postgis database using 3d citydatabase. I want to generate points on buildings surfaces just like in the shown image. Building surfaces are ...
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1answer
323 views

Generating CityGML file with number of storey attribute values from shp file?

I am trying to convert shp file to cityGML. In shapefile I have building footprints with attributes "storey" as number of storeys. I want to match this attribute to number of storeys attributes of ...
3
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1answer
501 views

How to create points grid on a 3d surface with geometry polygonz in postgis?

I am using 3dCityDatabase that imports CityGML buildings to postgresql as polygonz surfaces. In order to carry out an analysis I need to create points on these building surfaces. How can I do that? ...
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1answer
500 views

Building CityGMLs with OSM, OSM2World and FME

Here is my use-case, I am looking to write a singular FME workflow that takes XMLs from Overpass (full of building ways, parts and relations), runs them through OSM2World to get OBJs and then finally ...
3
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1answer
775 views

CityGML: Calculate orientation and inclination angles from a polygon's LinearRing coordinates

I have multiple CityGML files of different cities. Only one of them is in such a good condition that it includes the orientation and inclination angles of every roof polygon (as a gen:stringAttribute)....
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1answer
111 views

3d city database set up problem

I am trying to set up 3d city database and I have some problems. I hope you can help me. I receive an error as you can see attaching file. What is wrong? The error message is: '"\psql"' is not ...
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1answer
1k views

Converting multi-geometry GML with ogr2ogr not working

I am having difficulties with GML loading in PostGIS with ogr2ogr. It is a GML of buildingparts containing both polygons and (label)-points. In this example (below) I have a selection of 9 objects. ...
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1answer
125 views

Setting final orientation of polygons in CityGML model

I am converting shapefile model of buildings in LoD2 to CityGML. In CityGML really matter about poylgon orientation(Countercloskwise can be seen from outside, Clockwise from inside). I have problem ...
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0answers
45 views

Enclosing building models from bottom (Missing GroundFeatures) using FME?

I have 3D building model of the city and I would like to export it to proper CityGML model. I am trying to find out, how to make an intersection of building and terrain in order to make "...
1
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1answer
280 views

Editing coordinates of CityGML Building?

I'm looking for the most efficient method of editing coordinates for a building in a CityGML file. My setup: I have a base CityGML file with a set of buildings in a defined area of the community I'm ...
1
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1answer
116 views

Joining Excel file with CityGML file using FME?

I want to join a excel file with a CityGML file with FME. i want to join the excel file with the geometry of the CityGML file. all attributes should join this file which settings should i choose ...
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1answer
944 views

Converting citygml to KML?

I am trying to render citygml files. I am using NWW for rendering purpose. I have used citygml4j library to extract the GroundSurface, roof, and walls geometry, and was able to render them. But due to ...
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1answer
826 views

Extract geometry from citygml data using citygml4j

I have a citygml file with some buildings. And I am trying to extract the geometry of the polygon in that building using the citygml4j library. I have looked at the FeatureWalker class but I am unable ...
4
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1answer
455 views

RDF representation of 3D-geodata?

When it comes to 2D-data it seems there are a couple standards out there to represent it in a semantic way (GeoSPARQL, NeoGeo, ...). However I couldn't really find one to do that for 3D-data. I have ...
2
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1answer
205 views

Seeking a gvSIG plugin to go from shp to kml to cityGML

I'm looking for a gvSIG plugin to convert .shp to .kml and then to .cityGML. I'm working with gvSIG + 3D extension and I have .shp format data but I need it in .cityGML format.
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3answers
888 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 ...
23
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4answers
8k views

Is there an open source GIS to view and edit CityGML models?

I'm looking for an open source GIS that supports viewing and editing of CityGML models. So far, I've found a list of open source applications that support CityGML, but they all seem to be stand-...
4
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3answers
7k views

Using CityGML data with ArcGIS Desktop or QGIS?

I'm looking for advice on how best to use the CityGML data-structure and GIS (preferably ArcGIS/QGIS). I've read through their website and wiki and saw a list of software here that can be used to view ...