open source geospatial foundation taiwan chapter open source gis in taiwan: current and future...

Open Source Geospatial Foundation Taiwan Chapter

Open Source GIS in Taiwan: Current and Future

Dongpo DengTaipei International Conference on Digital Earth

2007at

Chinese Culture University中國文化大學5.18.2007

What is Open Source and How Does it Work

• Freely available software and source code with limited licensing restrictions on distribution

• Collaborative, community-based software development process

• Proactively engages software users with software developers

• The Internet provides the backbone for a virtual software development team

Adopted from David McIlhagga, Introduction to Open Source GIS, Open source GIS Conference 2004

Benefits of the Open Source Model

• No licensing fees– Resources are allocated to building applications and enhancing software, not licensing multiple machines

• Enables development of highly customized applications based on client’s needs

• Vibrant user community• Development priorities are driven by end-user needs

• Issues can be resolved in-house

Adopted from David McIlhagga, Introduction to Open Source GIS, Open source GIS Conference 2004

Open Source in GIS

• Open Source has played a significant, thought not always very visible role in the development of GIS technology. Ex. GDAL and PROJ4 libraries

• The new century has also seen the growth of integration and service companies organized primarily around use of open source technology. Ex. DM Solutions Group, Intevation Gmbh, CCGIS, and Camptocamp SA.

• All proprietary GIS software vendors are using some Open Source GIS components in their products. Ex. Libgeotiif and GDAL/OGR.

Adopted from Frank Warderman, OSGIS Rising, GIS Development, 11(1):44-45.

Two Tribes in Open Source GIS

• C Tribe– UMN Mapserver– GRASS– OpenEV– QGIS– OGR/GDAL– PROJ4– GEOS– PostGIS

• Java Tribe– GeoTools– GeoServer– DeeGree– OpenMap– JUMP– uDig

OpenGISWMS/WFS

Adopted from Paul Ramsey, Survey of Open Source GIS, Open source GIS Conference 2004

JDBC

C Tribe

OGR/GDAL

Mapserver

GRASS

PostGIS

OpenEV

OSSIM

Proj4

GEOS

QGIS

ThubanGMT


C Libraries

• GDAL– Raster Format Reader / Writer

• OGR– Vector Format Reader / Writer

• PROJ4– Coordinate Reprojection

• GEOS– Geometry Objects and Functions


C Servers

• Mapserver– OpenGIS Web Map Server– OpenGIS Web Feature Server– OGR / GDAL / PROJ4– PostGIS / ArcSDE / Oracle Spatial

• PostGIS– OpenGIS Simple Features for SQL– PROJ4 / GEOS


MapserverPostGIS

ArcSDE

Oracle

Shape

MapInfo

WMS

MapserverWFS

WMS

TIFF


PostGIS

LANWMS / WFS

PostGIS

Internet

JUMP

QGISWFSClient

WMSClient


C Applications

• OpenEV• QGIS• Thuban• GRASS• OSSIM • GMT

Viewers

Processors



OpenEV

QGIS



Thuban


GRASS


OSSIM

OpenSourceSoftwareImage Map

GMT

• Generic Mapping Tools• UNIX Philosophy

– Many small tools, chained together• Gridding, Contouring, Plotting• Surface Models


Java Tribe

GeoTools

OpenMap GeoServer

JTS Topology Suite

WKB4J

GML4J

JUMP Unified Mapping Platform

JCS Conflation Suite

uDig / JUMP2

DeeGree


Java Libraries

• JTS Topology Suite– OpenGIS Geometries and Methods

• GeoTools– Data Formats, Java GIS Toolkit

• WKB4J– Java Well-Known Binary Reader / Writer

• GML4J– Java GML Reader / Writer

Java Applications

•OpenMap•DeeGree•JUMP / JCS•GeoServer•uDig

JTS Based

Standalone

OpenMap

• Oldest Complete Java Toolkit• Telephone Company Project (BBN)• Design Application (not Data) Focused

DeeGree

• Academic Roots– Bonn University

• Message Passing API• OpenGIS Standards• Server Focused (WMS, WFS, SLD)

JUMP / JCS

• Specialized Original Vision (Conflation)

• General Purpose Tool• Editing, Processing, Transforming

GeoServer• OpenGIS WFS-T• Web Feature Server - Transactional• OpenGIS WMS (Beta)• Database Datasources + Shape



uDig• User-friendly Desktop Internet GIS• WFS, WMS, WRS• PostGIS, ArcSDE, Oracle Spatial• Printing, Reprojection• Shape, GeoTIFF

Pros and Cons on OSGIS

Strengths• Server Side• Heterogeneous Environments

• Performance• Standards Support• Complex or Custom Applications

Weaknesses• Interactive Desktop • Paper Production• Lowest Common Denominator

• “Standard” Applications


OSGIS in Taiwan

• Low Usage, unfavorable experience, and less tutorials in Tradition Chinese.

• The academic groups are might interested, but the governmental agencies are afraid of OSGIS.

• There is need of volunteer for promoting and consulting for OSGIS.

• With international trends of Geo-Information, there is lack of voice from OSGIS in Taiwan.

OSGeo Taiwan• A group of people coming from different fields ar

e interested in Open Source GIS.• OSGeo Taiwan Chapter is a voluntary organization

currently. Initial membership would like make it to legal body.

The missions of OSGeo Taiwan• To facilitate the development of open source geo-spa

tial software in Taiwan.• Advocacy and education of open source geo-spatial so

ftware. • To promote collecting and sharing of geo-spatial dat

a in public and private sector.• Act as a bridge between various groups like Developers, Application Users, NGOs, Government departments.

• Being a consultant of open source geo-spatial software by providing resource such as tutorials, technical guideline, workshop, and so on.

Open Source Geospatial Foundation Taiwan Chapter

Thank you for your attention!

Coming OSGeo workshop at Academia Sinica

Contact me: [email protected] list: [email protected]

OSGeo Taiwan Chapter: http://wiki.osgeo.org/index.php/Taiwan

open source geospatial foundation taiwan chapter open source gis in taiwan: current and future...

Documents

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source code

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use of open source technology

gis development

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