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CS144: Spatial Index
Grid File (2 points per bucket)
Grid File Data Structure 0 − 4040 − 5555 − 0 − − − 30,260 25,400 25,60 45,60 50,75 50,100 50,120 70,110 85,140 60,260 45,350 50,275
Querying Grid File
Grid File Insertion
Quad Tree (2 points per bucket)
Quad Tree (2 points per bucket) Second Level
Quad Tree Data Structure 50,200 75,100 25,300 25,60 45,60 50,275 60,260 50,75 50,100 85,14050,120 70,110 30,26025,400 45,300 SW SE NE NW
Querying Quad Tree
Quad Tree Insertion
General ( n x m ) Quad Tree At each level, split into ( n x m ) subregions
Multidimensional Data Structures Why do we need indexing? –Quick access Search methods –sequential search –binary search –balanced search tree (B or B+
Positive Gradient the s_ _ _ _ ness of the slope and the direction – UP (SW to NE)
Multidimensional Index Structures One dimensional index structures assume a single search key, and retrieve records that match a given search-key value.
CMU SCS : Multimedia Databases and Data Mining Lecture #7: Spatial Access Methods - IV Grid files, dim. curse C. Faloutsos.
Summary Index A general framework for content search in P2P networks is proposed Based on the framework, we implement a semantic-based document search.
Our Approach: Use a separate regression function for different regions. Problem: Need to find regions with a strong relationship between the dependent.
Data Structures for 3D Searching partly based on: chapter 12 in Fundamentals of Computer Graphics, 3 rd ed. (Shirley & Marschner) Slides by Marc van Kreveld.
Indexing Techniques for Multimedia Databases Multimedia Similarity Search Structure Image Indexing Video Indexing.
Chapter 7 Indexing Structures for Files Copyright © 2004 Ramez Elmasri and Shamkant Navathe.
Introduction to Algorithms 6.046J/18.401J/SMA5503 Lecture 12 Prof. Erik Demaine.
Chapter 12: Indexing and Hashing Basic Concepts Ordered Indices B+-Tree Index Files B-Tree Index Files Static Hashing Dynamic Hashing Comparison of Ordered.
VBI-Tree: A Peer-to-Peer Framework for Supporting Multi-Dimensional Indexing Schemes Presenter: Quang Hieu Vu H.V.Jagadish, Beng Chin Ooi, Quang Hieu Vu,
1 DATA STRUCTURES USED IN SPATIAL DATA MINING. 2 What is Spatial data ? broadly be defined as data which covers multidimensional points, lines, rectangles,
Insertion Sort David Borden CS 32. How Insertion Sort Works Author: Swfung8 Somewhat.
Gap O(1) AJCGDBFHE List Order Maintenance 1 EBHDCAFG Insert(x,y)Insert y after x Order(x,y)Returns if x is to the left of y I.
When Is Nearest Neighbors Indexable? Uri Shaft (Oracle Corp.) Raghu Ramakrishnan (UW-Madison)
Flexible and efficient retrieval of haemodialysis time series S. Montani, G. Leonardi, A. Bottrighi, L. Portinale, P. Terenziani DISIT, Sezione di Informatica,
Lumberyard Low Latency Time Series Indexing At Scale.
13.1 Vis_2003 Data Visualization Lecture 13 Visualization of Very Large Datasets.
Indexing DNA Sequences Using q-Grams Adriano Galati & Bram Raats.
Database Management Systems, R. Ramakrishnan and J. Gehrke1 File Organizations and Indexing Chapter 8 How index-learning turns no student pale Yet holds.
Model Evaluation Tools MET. What is MET Model Evaluation Tools ( MET )- a powerful and highly configurable verification package developed by DTC offering:
File Organizations and Indexing Chapter 8. Review: Memory, Disks, & Files Everything won’t fit in RAM (usually) Hierarchy of storage, RAM, disk, tape.
Introduction to Spatial modelling Statistics for Environmental Evaluation Duncan Lee and Marian Scott March / April 2009.
Lecture outline Nearest-neighbor search in low dimensions – kd-trees Nearest-neighbor search in high dimensions – LSH Applications to data mining.
DBMS Storage and Indexing. Disk Storage Disks and Files DBMS stores information on (“hard”) disks. This has major implications for DBMS design! ▫ READ:
Day 1 ArcGIS Goals for the Afternoon. 1-2 Exploring the ArcMap interface Table of Contents: Data views and layer legends are listed in the dockable Table.
Indexes An index on a file speeds up selections on the search key fields for the index. –Any subset of the fields of a relation can be the search key for.
File Organization & Indexing Reading: C&B, Ch 18 & 23.
Re-structuring datasets in SPSS. Wide vs Long format Open the wide.sav file inside the data folder – There are columns for each time point for each time.
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