Advanced Surveying: Total Station, GIS and Remote Sensing

2

GIS Data Models

Chapter Outline

 

2.1 Introduction

2.2 GIS Data Types

2.3 Spatial Data Models

2.4 Vector Data Model

2.5 Raster Data Model

2.6 Image Data

2.7 Vector and Raster—Advantages and Disadvantages

2.8 Attribute Data Models

2.9 Digital Elevation Model

2.10 DEM and Geographical Information Systems

2.11 Applications of DEM

2.12 Data Structure for Continuous Surface Model

2.1 Introduction

A model is a simplified representation of a phenomenon or a system. The data model represents a set of guidelines to convert the real world called entity to the digitally and logically represented spatial objects consisting of the attributes and geometry. The attributes are managed by a thematic structure, while the geometry is represented by a geometric-topological ...