1. Functions/Tasks of GIS:Data Input
The procedure of encoding data into a computer-readable form and writing the data to the GIS database.
Data input includes three major steps (the latter two steps are also called data preprocessing):
Data capture
Editing and cleaning
Geo-coding

2. Functions/Tasks of GIS: Data Input
Keyboard entry
Manual digitizing (e.g., tablet, on-screen)
Scanning

5. Geographic Data
Organized into Layers

6. Data Input :Data Sources for GIS
maps
aerial photos
satellite images
technical descriptions
GPS data