A1

• Main uses of GPS

  • Location: Determining a position
  • Navigation: Getting from one location to another
  • Tracking: Monitoring object or personal movement
  • Mapping: Creating maps of the world
• Using GPS to improve positional accuracy of satellite images

  1. Locate distinctive points on both satellite image and ground

  2. Collect accurate geographical coordinates at these locations using GPS receivers
• GPS technology

  • Aids in resolving land use conflicts by providing precise location data
  • Enhances GIS data quality, ensuring accurate mapping and analysis
  • Enables GIS professionals to make informed decisions about land use, minimizing conflicts and promoting efficient urban planning
• Computational Functions of a GIS System

  • Data Acquisition & Verification
  • Data Compilation
  • Data Storage
  • Data Update & Manipulation
  • Data Management & Exchange
  • Data Retrieval & Presentation
  • Data Analysis & Combination
• Data Acquisition & Verification


  Acquiring or gathering of spatial and attributes data which is then checked for accuracy and inconsistencies
• Data Compilation


  Set of statistical procedures performed on collected data to derive new information according to a given set of rules, resulting in intermediate data and final statistical outputs
• Data Storage


  Storing of spatial data as themes, layers, or coverages and attribute data in tabular form
• Data Update & Manipulation

  Modifying data to make it easier to read or more structured, e.g. storing a data log in alphabetical order
• Data Management & Exchange


  Managing information, organizing and visualizing maps and data, and analyzing relationships and patterns over any geography<|>Transforming data from a source schema to a target schema to allow data sharing between different computer programs
• Data Retrieval & Presentation

  Finding relevant information units that satisfy an information need from a collection of information sources<|>Comparing two or more data sets with visual aids, such as graphs, to represent how the information relates to other data
• Data Analysis & Combination


  Systematically applying statistical and/or logical techniques to describe, illustrate, condense, recap, and evaluate data<|>Collecting, combining, and visualizing various types of geospatial data to model and represent how people, objects, and phenomena interact within space, and to make predictions based on trends in the relationships between places