Geography 38:286 Computer Cartography - PowerPoint PPT Presentation

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Geography 38:286 Computer Cartography

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Geography 38:286. Computer Cartography. Application of Geomatics Technologies for ... in accordance with cartographic theory and practice. i.e. the rules of map making ... – PowerPoint PPT presentation

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Title: Geography 38:286 Computer Cartography


1
Geography 38286 Computer Cartography
  • Application of Geomatics Technologies for
    Emergency Management Response

2
What is a Geomatics?
  • Geomatics is the science and technology of
    gathering, analyzing, interpreting, distributing
    and using geographic information
  • Geomatics includes
  • surveying
  • mapping
  • remote sensing (RS)
  • geographic information systems (GIS)
  • global positioning system (GPS)

3
What is a Geomatics?
  • Surveying
  • measurement of
  • distances
  • directions
  • elevations
  • angles
  • for determining absolute or relative location
  • used mostly for property mgmt., construction
    engineering

4
What is a Geomatics?
  • Mapping
  • Graphic representation of real world
  • Depict spatial distribution of features and their
    attributes
  • Includes
  • data collection and analysis
  • map design using appropriate technique
  • production
  • in accordance with cartographic theory and
    practice
  • i.e. the rules of map making

5
What is a Geomatics?
  • GPS
  • a satellite-based positioning/navigation system
  • consisting of
  • a constellation of satellites
  • network of ground control stations
  • and a relatively inexpensive receiver
  • used for determining absolute location through
    the principles of triangulation (satellite
    ranging)

6
Satellite Ranging
7
What is a Geomatics?
  • Remote Sensing
  • the science and art of obtaining information
    about an object or phenomenon
  • through the analysis of data collected by
    instruments or sensors
  • without direct contact with the feature in
    question

8
Simple Remote Sensing System
9
Complete RS System
10
Photogrammetry
  • The extraction of quantitative information from
    aerial photography.
  • Typically applied to vertical photos.
  • Includes measures of distance, area, direction,
    and height.

11
Satellite Imagery
12
Multispectral Scanner Imagery
13
Spectral Signatures
14
Digital Image Classification
15
Digital Image Classification
16
What is a Geomatics?
  • GIS
  • an information system consisting of
  • hardware, software, spatial data,
    personnel,organizational and institutional
    arrangements
  • used for the
  • management, integration, storage, retrieval,
    creation, manipulation, analysis, and display
  • of spatial information

17
Spatial Information
18
Geospatial Data
19
Geospatial Database
  • GIS software links the location data and the
    attribute data

20
Spatial Analysis
21
Integrated GIS (IGIS)
  • Application that involves some degree of
    integration b/w geomatics technologies
  • Degree of integration varies considerably
  • Perceived advantages
  • seemless data transfer
  • real-time data acquisition/analysis
  • expert systems
  • Disadvantages?

22
Models of Integration
  • Gao (2002, PERS) identified 4 levels
  • Focused on integration of RS, GPS and GIS
  • Linear unidirectional flow
  • Interactive bidirectional flow
  • Hierarchical tiers that are unidirectional
  • Complex bidirectional between all components
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