Modelling 3D Underground Data in a WebGIS

19.09.13
Modelling 3D Underground Data
in a webbased 3D-Client
Till Adams (terrestris GmbH & Co Kg)
Emmanuel Belo (Camptocamp SA)
www.terrestris.de

16.07.20133D Data in a 2D & 3D WebGIS
We talk about....
Us first
What do we mean with „3D Underground Data“ … ?
2D WebGIS and 3D Data
Architecture and Setup
Preview on the System
Problems, Problems, Problems ....
Introduction

Team of terrestris:
Geoinformatics since 2002Geoinformatics since 2002
13 people, mainly Geographers13 people, mainly Geographers
and computer scientistsand computer scientists
Consulting, Projects, 100% OpenSourceConsulting, Projects, 100% OpenSource
Core development in OpenLayers, GeoExt and several ownCore development in OpenLayers, GeoExt and several own
projects, e.g. SHOGun, our Middlewareprojects, e.g. SHOGun, our Middleware
Partner of OpenGeo, OGC-Member, very active in german localPartner of OpenGeo, OGC-Member, very active in german local
chapter of OsGeo (DACH)chapter of OsGeo (DACH)
Introduction

Till Adams
Geoinformatics since 1998
Shareholder of terrestris
Project-Coordinator
Geographer (know much but nothing really)
FOSSGIS e.V. (DACH local chapter of OsGeo)
Introduction

We talk about....
Us first
3D Underground Data

Geological Data:
2D Geological Map
3D Underground Data

3D Underground Data
Geological Data:
2D Geological Map + Geological Drilling

3D Underground Data
Geological Data:
x,y,z,attribute
x,y,z,attribute
x,y,z,attribute
x,y,z,attribute
...

3D Underground Data
Geological Data:
2D Geological Map + Geological Profile

3D Underground Data
Geological Data:
Brandenburg/Germany

3D Underground Data
Geological Data:
Brandenburg/Germany:
Top of Permian Layers

We talk about....
Us first
2D GIS and 3D Data

2D GIS and 3D Data
Presenting this Data:
Points

2D GIS and 3D Data
Points
Lines

2D GIS and 3D Data
Points
Lines
Polygons

2D GIS and 3D Data
Points
Lines
Polys
WebGIS !

2D GIS and 3D Data
2D - WebGIS !

2D GIS and 3D Data
Put this Data into ….
…. PostGIS 2.0 !!

WKT imported to
PostGIS
2D GIS and 3D Data
Put this Data into PostGIS
… enables us to request it!
3D Model data in GST
(proprietary) exported
As WKT
Data1:
ST_GeomFromEWKT()
Points (x,y,z)
Data2:
ST_AsX3d()
Polyhedralsurface

2D GIS and 3D Data
ST_GeomFromEWKT():
Points(x,y,z,attribute)
Image from: http://www.gomatlab.de/flaeche-aus-punkten-erzeugen-t3607.html

2D GIS and 3D Data
Geological Data:

2D GIS and 3D Data

2D GIS and 3D Data
Geological Data:
2D Geological Map + Geological Profile

2D GIS and 3D Data
ST_3DClosestPoint(geometry g1, geometry g2);
X
X
X
X
X X
- strategy is known
(max. 12 surfaces)
- defined max-distance
(less surfaces possible)
- 1 query per surface

2D GIS and 3D Data
ST_3DClosestPoint(geometry g1, geometry g2);
X
X
X
X
X XXXXXX

Architecture 2D Client
Geo-
DB
Tomcat
WebGIS
4
2

We talk about....
Us first
3D GIS and 3D Data

WKT imported to
PostGIS
Put this Data into PostGIS
… enables us to request it!
3D Model data in GST
(proprietary) exported
As WKT
Data1:
ST_GeomFromEWKT()
Points (x,y,z)
Data2:
ST_AsX3d()
Polyhedralsurface
3D GIS and 3D Data

3D GIS and 3D Data
ST_AsX3d():
Polyhedralsurfaces
Surfaces!
Image from: http://eslab.bu.edu/publications/publications.php

Geological Data:
Top of Permian Layers
3D GIS and 3D Data

3D GIS and 3D Data
Geological Data:
Base of Tertiary Layers
+ Top of Permian Layers

3D GIS and 3D Data
Geological Data:
We need s.th.
Like this:

We talk about....
Us first
3D GIS and 3D Data

Architecture 3D Client
Geo-
DB
Tomcat
WebGIS
4
„3D“
W3DS

Architecture 2D Client 3D Client
X3Dom-Viewer
GeoServer X3DomW3DS

„GeoExt 3D“ combines ExtJS with X3Dom
- uses API on top of X3DOM
- uses ExtJS 4 elements such as Viewport, Panels, etc.
X3DOMAPI
4

„GeoExt 3D“ combines ExtJS with X3Dom
- API methods such as
- setScaleZ(scale)
- setLayerVisibility(layerID, visibility)
- setLayerColor(layer, color)
- getState(); // setState(state)
- Navigation with Mouse/Keys

WebGIS
W3DS Service:
- data sent to client in X3D format
- data rendered in the client

We talk about....
Us first

We talk about....
Us first
Problems, Problems, Problems

Problems, Problems, Problems
Problems we had to catch up ….
- … Performance
- reduce data density
- enhance hardware
- wait ….
- … W3DS is not officially supported by GeoServer, so had to
use GeoServer UX
- … no API in X3Dom, so created one
- …

Many thanks!
Many thanks for listening !!!
terrestris GmbH & Co. KG
Pützchens Chaussee 56
53227 Bonn
Germany
Dipl.-Geogr. Till Adams
Tel. +49 - 228 – 962 899 52
adams@terrestris.de

Modelling 3D Underground Data in a WebGIS

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