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Midterm

GEOG281 Study Guide - Midterm Guide: Spatial Database, Data Analysis, Data Integrity

by

Department
Geography and Environmental Management
Course Code
GEOG281
Professor
Su Yin Tan
Study Guide
Midterm

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Lecture 2
Spaal Data Models
Represenng Reality
"a collecon of computer hardware, soware, geographic data, methods, and personnel designed to
eciently capture, store, update, manipulate, analyse, and display all forms of geographically referenced informaon"
What is a data model? 
 !
"
#$%"&''!
!
Representaon in GIS
Real World Conceptual Representaon Data Model
"'&!()The Data Model*"
" 
'!!"'+$%
,
Represenng Reality in GIS
#-./.01.
'"''
The Themac Approach
#2&'

"')3!"'"!!
!*
GIS as a Representaon of Reality
4* 
  
5* '
  '$"% 
6* 7
 8""


Only pages 1-2 are available for preview. Some parts have been intentionally blurred.

Recognize Limitaons
'9"
Field vs. Objects
:
82'8;<#<==>-.<;/.<
>"''"
o""'?)3>&*
; 
; !!@! 
'A8.#.)&:*
; "
')!!*
BB@@
Data Types
GIS Data Types
C'D
Two basic data types: Spaal and A+ribute
Spaal:
A"

8
)'*
#
)!!*
.&)*

A+ribute
A
#
("@("
;E
.&!
!!
Characteriscs that de,ne objects:
#')(A!'@ *
B)("@("*
)"B*
')!!@'*
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