Generating composite thematic maps from semantically different shapefile collections
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Generating Composite Thematic Maps From Semantically-Different Shapefile Collections. Ghulam Memon Ashraf Memon Kai Lin Ilya Zaslavsky. Introduction. Ontology Is a collection of well defined terms, which belong to a particular domain. Shows relations between these terms.

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Generating Composite Thematic Maps From Semantically-Different Shapefile Collections

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Generating composite thematic maps from semantically different shapefile collections

Generating Composite Thematic Maps From Semantically-Different Shapefile Collections

Ghulam Memon

Ashraf Memon

Kai Lin

Ilya Zaslavsky

www.geongrid.org


Introduction

Introduction

  • Ontology

    • Is a collection of well defined terms, which belong to a particular domain.

    • Shows relations between these terms.

    • Makes data search intelligent by adding a layer of indirection

  • GEON Data Registration

    • Data Registration

    • Item Level Registration

    • Item Detail Level

      Registration

Dataset

USGS Geology Time Scale Ontology

Mesozoic

Item Detail

Level

Jr.

Tri

Jurassic

Cretaceous

Triassic

Jurr

Global Legend

#4DB47E

#7EC31C

#67C387

www.geongrid.org


Semantically different shapefile collections

Semantically Different Shapefile Collections

www.geongrid.org


Composite thematic maps

Composite Thematic Maps

www.geongrid.org


Architecture

Ontology

Service

Knowledge Representation

Ontology Engine

Mapping

Services

Mapping

ArcIMS

Webservices

Middleware

Architecture

Geon Dataset Ids

GEONSearch/Compositon Portlet

Color – Value Map

Gridsphere

  • Dataset Ids to Dataset Names

  • Dataset Ids to Ontology Ids

  • Ontology Ids to Ontology Names

  • Ontology Ids to Ontology Concepts

Generate Map

GEON

Metadata

Catalogue

Download Datasets

SRB

www.geongrid.org


Query portlet capabilities

Query Portlet Capabilities

  • Datasets are queried for concepts instead of keywords.

  • Generated result sets can be downloaded.

  • Result sets can be saved in user’s work space.

  • Generation of integrated maps.

www.geongrid.org


Architecture1

Architecture

Geon Dataset Ids

Client Portlet

Map Integration

Portlet (Mediator)

Gridsphere

  • Dataset Ids to Dataset Names

  • Dataset Ids to Ontology Ids

  • Ontology Ids to Ontology Names

  • Ontology Ids to Ontology Concepts

Redefine Query

Generate Map

GEON

Metadata

Catalogue

Execute Query

Mapping

Services

Query

Service

Ontology

Service

Webservices

SRB

Mapping

Download Datasets

Query

Tracking

DB

Knowledge Representation

Store Query Results

Query Result Indexing

Ontology Engine

ArcIMS

www.geongrid.org


Future goals

Future Goals

  • Improve and Enhance query performance

    • Save generated result sets.

    • Index the query itself, so that next time the query doesn’t need to be executed but the stored result set is given back.

    • Generated result sets can be intelligently associated with ontologies

  • Support spatial queries instead of queries based on pre-selected datasets.

www.geongrid.org


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