Here is my Query, where are my Results? A Search Log Analysis of The EOWEB® GeoPortal

Sirko Schindler 1, Marcus Paradies 1, André Twele 2

1: DLR Institute of Data Science, JenaData Management Technologies Group

2: German Remote Sensing Data Center, OberpfaffenhofenD-SDA-Services Group

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 1

Motivation

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 2

The data and information produced in the framework of Copernicus should be made available on a full, open and free-of-charge basis […], in order to promote their useand sharing, […].

Regulation (EU) No 377/2014 of the European Parliament and of the Council

Not just available, but findable!

EOWEB® GeoPortal

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 3

Keyword Spatial Temporal Type

Collection

Processing Pipeline

• Elastic pipeline

• External sources and manual mappings to classify concepts

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 4

EOWEB GeoPortal LogfilesFilebeats Logstash Elasticsearch

d3js

Kibana

Constraint Usage – Constraint-Combinations

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 5

Constraint Usage – Frequency of Constraints

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 6

Keywords

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 7

Keyword Concept Classes

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 8

Keywords - Geolocations

• Coordinates

• “N39E068“; “51.75602 / 14.31971“; …

• Locations

• Multiple languages

• Different granularities

• Results for only ~10% of keywords

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 9

Issues: Typos and Abbreviations

• Typographical Issues

• Abbreviation Issues

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 10

Issues: Semantics and Languages

• Semantic Issues

• Languages

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 11

Suggestions – Resolving Keywords

• Resolve location based keywords

• RegExp for coordinates

• Databases for names

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 12

• AutoComplete

• Use codelists generated from the metadata

• Suggest users the “correct” spelling

Suggestions – Semantic Web

• Network of concept and their relations

• Labels & alternative labels in multiple languages

• Synonyms, Hyponyms, Hypernyms, …

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 13

https://lod-cloud.net/

Questions, Comments, … ?

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 14

Contact

• Sirko Schindler

• Sirko.Schindler@dlr.de

• Marcus Paradies

• Marcus.Paradies@dlr.de

• André Twele

• Andre.Twele@dlr.de

> A Search Log Analysis of The EOWEB Geoportal • Sirko Schindler, Marcus Paradies, André Twele • BiDS2019 > 19.02.2019DLR.de • Chart 15