Lecture05

Lecture05 - You can use a GIS to answer the question: What...

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1 What is Where? Getting Started With Geographic Information Systems Chapter 5 You can use a GIS to answer the question: What is where? What is where? ± WHAT: WHAT: Characteristics of attributes or features ± WHERE: WHERE: In geographic space What and Where Review: Flat File Database Stream Value Value Value Depth Flow Condition Dam Value Value Value Canal Value Value Value
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2 Arc/node map data structure with files A GIS links attribute and spatial data ± Attribute Data ² Flat File ² Relations ± Map Data ² Point File ² Line File ² Area File ² Topology ² Theme What is a Data Model? A logical construct for the storage and retrieval of information. GIS map data structures are map map data models. Attribute Attribute data models are needed for the DBMS. The origin of DBMS data models is in computer science. Maps and Memory Joshua Foer (2011) “Moonwalking With Einstein: The Art and Science of Remembering Everything,”
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3 Data Models and Memory A DBMS contains: ± Data definition language ± Data dictionary ± Data-entry module ± Data update module
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This note was uploaded on 12/28/2011 for the course GEOG 176a taught by Professor Clarke during the Fall '09 term at UCSB.

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Lecture05 - You can use a GIS to answer the question: What...

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