Spatial Data types and acquiring consideration.pptx

Spatial Data types �and acquiring consideration. �Data models and structures. Attribute-based operation

1. Dr. Muhammad Ahmed Lecture 1 Assistant Professor Department of Urban & Infrastructure Engineering NED University of Engineering & Technology-Karachi University Road, Karachi - 75270, Pakistan Telephone : [phone] EXT 2454 Fax : [phone]   email: [email protected] INTRODUCTION TO GEO-INFORMATICS

2. Lecture 2 Spatial Data types and acquiring consideration. Data models and structures. Attribute-based operation Able to understand the Concept of Spatial Data What is Spatial Data Types of Spatial Data Data Model and Structures SPATIAL DATA

3. Overview Geo-Workspace “As on earth surface” Do you know the meaning of Pixel? – Picture Element Point line and polygon – Data Entry Operator (Vector) Raster and Vector Data

4. Spatial Data Spatial Data of Two Types Raster -Pixel Based Vector -Point Based Geometry Attributes Geographic Coordinate System Geo-referencing and Geocoding

5. Raster – Vector

6. Vector Data Point, Line and Polygon Point Line Polygon

7. Attributes

8. Raster Pixel Based Data Information available in form of colour or Numbers Small Pixel size – Large Information

9. Coordinate System Geographic Coordinate System coordinate systems that span the entire globe (e.g. latitude / longitude). Projected Coordinate System coordinate systems that are localized to minimize visual distortion in a particular region (e.g. Robinson, UTM, State Plane)

10. Georeferencing and Geocoding Process of fitting data to the appropriate coordinates of the real world in Geo-Workspace

11. Check your Understanding Level What is Spatial Data? what are there types?. What are the Difference between Raster and Vector Data? What is an image data and how is it gathered? Enumerate the advantages and disadvantages of vector data. Enumerate the advantages and disadvantages of raster data. What is attribute data and how it is defined in GIS ? What is the difference between GIS and CAD?

12. Lecture 3 Spatial Analysis Able to understand the Concept of Spatial Analysis Spatial Distribution of Data Concept of Spatial Layering Data Analysis SPATIAL DATA

13. Spatial Data

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