digital maps: geographic web services reunión otoño 2003 mesa ciencias de la tierra
DESCRIPTION
Digital Maps: Geographic Web Services Reunión Otoño 2003 Mesa Ciencias de la Tierra 3 de octubre 2003. Intenet 2 and Geographic Applications. Internet 2 as a communication channel Geographic data: big volume of data Digital Maps Construction for a specific domain Collections in servers - PowerPoint PPT PresentationTRANSCRIPT
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Digital Maps: Geographic Web ServicesReunión Otoño 2003
Mesa Ciencias de la Tierra
3 de octubre 2003
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Intenet 2 and Geographic Applications
• Internet 2 as a communication channel• Geographic data: big volume of data• Digital Maps Construction for a specific domain• Collections in servers• Services to access collections
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GISUDLA Project Goals
• Digital Map Collection Construction for a specific domain and the Services needed to access• Use of standards: OpenGIS• Data Volume reduction to improve the use of the channel
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OpenGIS: general hierarchy
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Road description: an example
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Type/Schema Registry
Service Registry
Other Registri
es
Type/Schema Registry
Service Registry
Other Registrie
s
Web Service
Information Community #1
Information Community #2
Web Service
Web Service
Web Services
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What is GML ?
GML or Geography Markup Language is an XML based encoding standard for geographic information
www.opengis.net/gml/02-069/GML2-12.html
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GML
XSLT
HTML
SVG
X3D
Geodatabase
GML
VRML
DBF
SHP
XSLT
GML and GISELA
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WFS WFS
WFS
WFS
WFS
GML WFS
GML
=> Geo-Web
Geo-data A
Geo-data C
WFS: general scheme
Geo-data B
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GML: a better binary
GML data
GML dataSmall over the
wire
GML data
But BIG again once we de-compress
Compression Engine
One end of the wire
De-Compression
Engine
The other end of
the wire
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GISUDLA Project
Arc INFO
.shp
.dbf
GML
GML v.2.1.2
XHTML
SVG
X3D
OpenGIS MySQL
Oracle
WFS
ESRI
ArcSDE
ESRI
ArcIMS
ESRI
WFS
Data Sources Web Services User Interface
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<xs:element name="Departamento" type="ex:DepartamentoType" substitutionGroup="gml:_Feature"/>
<xs:complexType name="DepartamentoType"><xs:complexContent>
<xs:extension base="gml:AbstractFeatureType"><xs:sequence>
<xs:element name="nombre" type="xs:string"/><xs:element name="jefeDepartamento" type="xs:string"/><xs:element ref="gml:pointProperty"/><!-- Punto que apunta a la ubicación del departamento -->
</xs:sequence></xs:extension>
</xs:complexContent></xs:complexType>
GML Schema of the Feature Department
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GML Code of the Feature Department
<Departamento><nombre>Departamento de Sistemas</nombre><jefeDepartamento>Abraham Ameneiro</jefeDepartamento><gml:PointProperty>
<gml:Point><gml:coord>
<gml:X>1.0</gml:X><gml:Y>1.0</gml:Y>
</gml:coord></gml:Point>
</gml:PointProperty></Departamento>
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GISUDLA Online
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Metadata Digital Layer Access
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Generating GMLv2.1.2
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Layer Visualization
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Final Remarks
• Service construction• Use of standards: OpenGIS• Platform to add new functions• Application can be installed easily• Map visualization and user interaction should be improved with a wide bandwidth to have a good performance
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www.udlap.mx/~ gisudla
Abraham López AmeneyroAntonio Razo RodríguezDavid Sol MartínezGerardo Cepeda Porras