Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios

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1. Verfasser: Kufer, Stefan (VerfasserIn)
Format: Abschlussarbeit Buch
Sprache:English
Veröffentlicht: Bamberg University of Bamberg Press 2019
Schriftenreihe:Schriften aus der Fakultät Wirtschaftsinformatik und Angewandte Informatik der Otto-Friedrich-Universität Bamberg Band 38
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Datensatz im Suchindex

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adam_text CONTENTS GLOSSARY XIII PART I: BACKGROUND AND PROBLEM DESCRIPTION 1 1 INTRODUCTION 3 1.1 MOTIVATION ................................................................................. 3 1.2 INVESTIGATED APPLICATION SCENARIOS ......................................... 7 1.2.1 DISTRIBUTED APPLICATION SCENARIO ............................... 8 1.2.2 CENTRALIZED APPLICATION SCENARIO ............................... 9 1.3 PROBLEM DESCRIPTION .................................................................. 11 1.4 THESIS OBJECTIVES ..................................................................... 13 1.5 THESIS OUTLINE ........................................................................... 14 2 RELATED WORK 19 2.1 COMPRESSING DATA ..................................................................... 21 2.1.1 BIT VECTOR COMPRESSION SCHEMES ............................... 21 2.1.2 FLOATING-POINT DATA COMPRESSION SCHEMES ............ 23 2.2 APPROXIMATING A POINT SET WITH BOUNDING VOLUMES ............ 24 2.3 REPRESENTING A COMPLEX OBJECT WITH A SET OF SIMPLER OBJECTS 26 2.3.1 POLYGON DECOMPOSITION PROBLEM ............................... 27 2.3.2 POLYGON COVER PROBLEM ............................................... 28 2.3.3 BINARY IMAGE COMPRESSION ......................................... 29 2.4 DIVIDING A SET OF POINTS INTO GROUPS AND REPRESENTING EACH GROUP BY A SEPARATE AREA .................................................... 30 2.4.1 CLUSTERING ..................................................................... 33 2.4.2 COMPUTATIONAL GEOMETRY ............................................ 34 2.4.3 MULTIDIMENSIONAL DATA STRUCTURES ............................ 35 2.5 QUERYING FOR SPATIAL DATA ..................................................... 49 2.6 FURTHER RELATED WORK .............................................................. 52 2.6.1 LINEAR QUADTREE ENCODINGS ......................................... 53 2.6.2 P2P MULTIDIMENSIONAL INDEXING METHODS AND P2P OVERLAY NETWORKS ........................................................ 54 2.6.3 METRIC ACCESS METHODS ............................................... 55 2.6.4 PTOLEMAIC ACCESS METHODS ............................................ 58 PART II: DISTRIBUTED APPLICATION SCENARIO 59 3 PRELIMINARIES FOR THE DISTRIBUTED APPLICATION SCENARIO 61 3.1 GENERAL PRELIMINARIES .............................................................. 61 3.2 QUADTREE-RELATED PRELIMINARIES ............................................ 62 3.3 EXCURSUS: DEALING WITH SPATIAL ERRORS .................................. 66 X CONTENTS 4 SUMMARIZATION APPROACHES FOR SPATIAL DATA POINT SETS 71 4.1 DATA PARTITIONING APPROACHES ............................................... 72 4.2 SPACE PARTITIONING APPROACHES ............................................... 75 4.3 HYBRID APPROACHES .................................................................. 82 5 RESOURCE SELECTION 99 5.1 CONCEPTUAL RESOURCE RANKING ALGORITHMS ............................ 100 5.2 A CONCEPTUAL &NN ALGORITHM ................................................ 104 6 GENERAL EVALUATION ENVIRONMENT 109 6.1 ASSESSMENT OF THE RESULTS ..................................................... 109 6.2 DATA COLLECTIONS ........................................................................ ILL 6.3 EXPERIMENTAL SETUP .................................................................. 114 6.4 ADJUSTMENTS FOR SIMULATING A * REAL-WORLD-SYSTEM * ............. 117 6.4.1 ADJUSTMENTS CONCERNING THE RESOURCE DESCRIPTION DATA (AND THEIR CONSEQUENCES) ................................... 118 6.4.2 REDUCING THE INITIAL QUERY RADIUS ............................ 123 6.4.3 SELECTION OF THE SITES AND THE TRAINING DATA ............. 124 7 EXPERIMENTAL RESULTS * ANALYSIS OF THE T1 COLLECTION 127 7.1 GENERAL OVERVIEW OF THE RESULTS ............................................ 127 7.1.1 ANALYSIS OF THE SKYLINES ............................................... 128 7.1.2 ANALYSIS OF THE KEY FIGURES FOR THE SKYLINE PARAME TERISATIONS ......................................................... 131 7.1.3 COMPARISON OF THE APPROACHES AT * MBRSIZE * ............ 144 7.2 RESULTS FOR THE MBR-BASED APPROACHES ............................... 148 7.3 RESULTS FOR THE K-D-BASED APPROACHES ................................... 151 7.4 RESULTS FOR THE QUADTREE-BASED APPROACHES ......................... 156 7.5 RESULTS FOR THE VORONOI-BASED APPROACHES ............................ 162 7.6 COMPARISON OF THE PURE SPACE PARTITIONING APPROACHES AND THE IMPROVEMENTS ACHIEVABLE BY THEIR SIMPLEST HYBRID EX TENSIONS ..................................................................................... 169 8 IN-DEPTH EVALUATION OF THE SELECTED APPROACHES 177 8.1 FURTHER EVALUATION OF THE T1 COLLECTION ............................... 181 8.1.1 RESULTS AT * MBRSIZE * ................................................... 182 8.1.2 RESULTS AT * MBRSIZE- * ................................................ 186 8.1.3 RESULTS AT * MBRSIZE+ * ................................................ 198 8.2 EVALUATION OF THE F COLLECTION ............................................... 214 8.3 EVALUATION OF THE T1 COLLECTION (DISALLOWING A DIRECT REPRE SENTATION) ......................................................................... 224 8.4 EVALUATION OF THE F COLLECTION (DISALLOWING A DIRECT REPRE SENTATION) ......................................................................... 230 8.5 EVALUATION OF THE F COLLECTION WITH AN ALTERED SELECTION OF THE QUERY POINTS ..................................................................... 233 8.6 EVALUATION OF THE T2 COLLECTION ................................................ 237 CONTENTS XI 8.7 EVALUATION OF THE SELECTED APPROACHES FOR APPROXIMATE SIM ILARITY SEARCH .................................................................. 243 8.8 EXCURSUS: EVALUATION OF ADDITIONAL PROPERTIES ................... 249 8.8.1 EVALUATION OF THE QUERY RADIUS REDUCTION ............. 249 8.8.2 EVALUATION OF THE DURATION OF THE INITIAL RESOURCE RANKING ........................................................................ 257 8.9 SUMMARIZATION OF THE RESULTS FOR THE DISTRIBUTED APPLICA TION SCENARIO ...................................................................... 262 8.9.1 KEY RESULTS OF THE EVALUATION .................................. 262 8.9.2 DEGREE OF THESIS OBJECTIVE ACHIEVEMENT AND CONTRI BUTIONS ............................................................... 265 8.9.3 STARTING POINTS FOR FUTURE WORK ............................... 268 PART III: CENTRALIZED APPLICATION SCENARIO 273 9 PRELIMINARIES AND MOTIVATION FOR THE CENTRALIZED APPLICA TION SCENARIO 275 10 INTEGRATING SUMMARIES INTO AN R-TREE 279 10.1 THE CLASSICAL R-TREE .................................................................. 279 10.2 MODIFICATIONS TO THE TRADITIONAL R-TREE ............................... 284 10.2.1 SELECTBEST-MODIFICATIONS ..................................... 285 10.2.2 BACKTRACKING OPTIMIZATION ......................................... 285 10.2.3 SPLIT-MODIFICATIONS ..................................................... 286 10.3 REQUIREMENTS FOR SUMMARIES IN AN R-TREE ............................ 286 10.4 SUMMARY-FROM-SUMMARIES CALCULATION AND STORAGE STRUC TURES .................................................................................. 288 10.4.1 MBRQT CA ..................................................................... 289 10.4.2 QTMBR*? A ..................................................................... 291 10.5 EFFECTS AND TRADE-OFFS OF THE INTEGRATION OF SOPHISTICATED SUMMARIZATION APPROACHES .................................................. 293 11 QUERY ALGORITHMS 295 11.1 RANGE QUERY ALGORITHM ........................................................... 295 11.2 &NN QUERY ALGORITHM ........................................................... 295 12 EVALUATION ENVIRONMENT 299 12.1 ASSESSMENT OF THE RESULTS ..................................................... 299 12.2 DATA COLLECTIONS ........................................................................ 299 12.3 EXPERIMENTAL SETUP ................................................................. 300 13 EVALUATION 307 13.1 ASSESSMENT OF THE R-TREE CONSTRUCTION TIMES ...................... 307 13.2 ASSESSMENT OF THE STRUCTURAL DIFFERENCES ............................ 318 13.2.1 MBR-LIKE R-TREES ....................................................... 318 XII CONTENTS 13.2.2 SUMMARY-LIKE R-TREES ................................................ 345 13.3 ASSESSMENT OF THE QUERY RESULTS ............................................ 370 13.3.1 RESULTS FOR THE T_5 SCENARIO ......................................... 370 13.3.2 RESULTS FOR THE T_25 SCENARIO ...................................... 400 13.3.3 RESULTS FOR THE R_5 SCENARIO ......................................... 408 13.3.4 RESULTS FOR THE R_25 SCENARIO ...................................... 422 13.4 SUMMARIZATION OF THE RESULTS FOR THE CENTRALIZED APPLICA TION SCENARIO .............................................................................. 428 13.4.1 KEY RESULTS OF THE EVALUATION ................................... 428 13.4.2 DEGREE OF THESIS OBJECTIVE ACHIEVEMENT AND CONTRI BUTIONS ........................................................................... 438 13.4.3 STARTING POINTS FOR FUTURE WORK ............................... 439 PART IV: CONCLUSION 449 14 OVERALL CONCLUSION 451 A. APPENDIX 453 LIST OF FIGURES 457 LIST OF TABLES 471 REFERENCES 479
any_adam_object 1
author Kufer, Stefan
author_GND (DE-588)120160334X
author_facet Kufer, Stefan
author_role aut
author_sort Kufer, Stefan
author_variant s k sk
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genre (DE-588)4113937-9 Hochschulschrift gnd-content
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language English
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physical XXIV, 501 Seiten Illustrationen, Diagramme, Karten 24 cm
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publishDate 2019
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publisher University of Bamberg Press
record_format marc
series Schriften aus der Fakultät Wirtschaftsinformatik und Angewandte Informatik der Otto-Friedrich-Universität Bamberg
series2 Schriften aus der Fakultät Wirtschaftsinformatik und Angewandte Informatik der Otto-Friedrich-Universität Bamberg
spellingShingle Kufer, Stefan
Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios
Schriften aus der Fakultät Wirtschaftsinformatik und Angewandte Informatik der Otto-Friedrich-Universität Bamberg
Raumdaten (DE-588)4206012-6 gnd
Abfrage (DE-588)4198788-3 gnd
Geoinformatik (DE-588)7571300-7 gnd
Nächste-Nachbarn-Problem (DE-588)4376579-8 gnd
Big Data (DE-588)4802620-7 gnd
Geoinformation (DE-588)4429674-5 gnd
Peer-to-Peer-Netz (DE-588)4343110-0 gnd
Algorithmus (DE-588)4001183-5 gnd
Datenanalyse (DE-588)4123037-1 gnd
Ähnlichkeitssuche (DE-588)4621546-3 gnd
Datenverwaltung (DE-588)4011168-4 gnd
RDF Informatik (DE-588)4737512-7 gnd
Mehrdimensionale Datenstruktur (DE-588)4203964-2 gnd
subject_GND (DE-588)4206012-6
(DE-588)4198788-3
(DE-588)7571300-7
(DE-588)4376579-8
(DE-588)4802620-7
(DE-588)4429674-5
(DE-588)4343110-0
(DE-588)4001183-5
(DE-588)4123037-1
(DE-588)4621546-3
(DE-588)4011168-4
(DE-588)4737512-7
(DE-588)4203964-2
(DE-588)4113937-9
title Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios
title_auth Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios
title_exact_search Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios
title_full Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios Stefan Kufer
title_fullStr Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios Stefan Kufer
title_full_unstemmed Effective and efficient summarization of two-dimensional point data approaches for resource description and selection in spatial application scenarios Stefan Kufer
title_short Effective and efficient summarization of two-dimensional point data
title_sort effective and efficient summarization of two dimensional point data approaches for resource description and selection in spatial application scenarios
title_sub approaches for resource description and selection in spatial application scenarios
topic Raumdaten (DE-588)4206012-6 gnd
Abfrage (DE-588)4198788-3 gnd
Geoinformatik (DE-588)7571300-7 gnd
Nächste-Nachbarn-Problem (DE-588)4376579-8 gnd
Big Data (DE-588)4802620-7 gnd
Geoinformation (DE-588)4429674-5 gnd
Peer-to-Peer-Netz (DE-588)4343110-0 gnd
Algorithmus (DE-588)4001183-5 gnd
Datenanalyse (DE-588)4123037-1 gnd
Ähnlichkeitssuche (DE-588)4621546-3 gnd
Datenverwaltung (DE-588)4011168-4 gnd
RDF Informatik (DE-588)4737512-7 gnd
Mehrdimensionale Datenstruktur (DE-588)4203964-2 gnd
topic_facet Raumdaten
Abfrage
Geoinformatik
Nächste-Nachbarn-Problem
Big Data
Geoinformation
Peer-to-Peer-Netz
Algorithmus
Datenanalyse
Ähnlichkeitssuche
Datenverwaltung
RDF Informatik
Mehrdimensionale Datenstruktur
Hochschulschrift
url https://fis.uni-bamberg.de/handle/uniba/46917
http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=031681297&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
volume_link (DE-604)BV035260948
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