GE 11 Overview of Geodetic Engineering. Florence A. Galeon Assistant Professor U.P. College of Engineering

Transcription

1 GE 11 Overview of Geodetic Engineering Florence A. Galeon Assistant Professor U.P. College of Engineering 1

2 Outline I. Five Major Fields of Geodetic Engineering II. Overview of Surveying III. Overview of Remote Sensing and Photogrammetry IV. Overview of Geographic Information Systems (GIS) V. Overview of Global Positioning System (GPS) VI. Overview of Cartography VII. Geomatics Engineering 2

3 Five Major Fields of Geodetic Engineering Course I. Surveying II. Remote Sensing and Photogrammetry III. Geographic Information Systems (GIS) IV. Global Positioning System (GPS) V. Cartography 3

4 Overview of Surveying 4

5 Definition of Surveying 1 Surveying is the science or art of making such measurements as are necessary to determine the relative position of points above, on, or beneath the surface of the earth, or to establish such points. (Breed, Hosmer, and Bone) 2 Surveying is the art of measuring horizontal and vertical distances between objects, of measuring angles between lines, of determining the direction of lines, and of establishing points by predetermined angular and linear measurements. (Davis, Foote, Anderson, and Mikhail) 5

6 Sample Surveying Instruments 6

7 Overview of Remote Sensing and Photogrammetry 7

8 Definition of Remote Sensing It is the measurement or acquisition of some property of an object or phenomenon, by a recording device that is not in physical contact with the object or phenomenon under study (formal definition of the ASPRS). Remote sensing is both an art and a science. 8

9 Remote Sensing System 9

10 Some Remote Sensing Satellites SPOT 1, 2, 4 QuickBird RADARSAT 1 NOAA 12, 14, 16 10

11 Sample Products of Remote Sensing SPOT False Color Image Ikonos True Color Image 11

12 NOAA-14 Satellite Image of Hurricane Isaac 12

13 Satellite Image of a Philippine Typhoon 13

14 2004 QuickBird Satellite Image of UP Campus 14

15 Large Scale Display 15

16 Close-up Shot of the UP College of Engineering 16

17 2002 UP Campus Aerial Photo 17

18 Close-up Shot of the UP College of Engineering 18

19 Sample Aerial Photo of Parañaque (res = 0.1 m) 19

20 Larger Scale Display 20

21 People can be seen on the image 21

22 Overview of GIS 22

23 Defining Geographic Information Systems (GIS) In simple terms, GIS is a set of computer-based systems for managing geographic data and using these data to solve real-world spatial problems. 23

24 Anatomy of GIS The anatomy of GIS refers to the various components that make up the system. GIS is generally thought to be comprised of the following components: hardware, software, data, people and organizations, and methods and institutional arrangements for collecting, storing, analyzing and disseminating information about areas of the earth. 24

25 GIS layers to model the real world 25

26 GIS stores information as a collection of thematic layers (left image). By a processing called geocoding, the location of a particular thematic feature may be recorded (right image). 26

27 UP Campus Barangay Jurisdiction 27

28 Sample GIS Layers Extraction 28

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31 Overview of GPS 31

32 GPS Facts The Global Positioning System, better known as GPS, is a satellite-based radio navigation system developed and operated by the U.S. Department of Defense. GPS permits land, sea, and airborne users to determine their three dimensional position, velocity, and time, 24 hours a day in all weather, anywhere in the world. GPS provides specially coded satellite signals that can be processed by a GPS receiver, which can compute position, velocity, and time. Four GPS satellite signals are used to compute 4 dimensions of X, Y, Z (position), and time. 32

33 Position Determination with GPS 33

34 Position Determination with GPS 34

35 Three Satellites (2D Positioning)

36 GPS Receivers Handheld GPS Receivers Survey Grade GPS Receivers 36

37 GPS Satellites Atomic Clock 37

38 Actual GPS Survey 38

39 Actual GPS Survey 39

40 Some Practical GPS Applications 40

41 Overview of Cartography 41

42 Cartography science and art of making maps and charts word "cartography" is derived from the Greek words chartes (sheet of papyrus) and graphy (writing). 42

43 Sample Map Products 43

44 GeomaticsEngineering It is the discipline of gathering, storing, processing, and delivering of geographic information, or spatially referenced information It includes the tools and techniques used in land surveying, remote sensing, Geographic Information Systems (GIS), Global Navigation Satellite Systems (GPS, GLONASS, GALILEO, COMPASS), and related forms of earth mapping 44

45 Interrelationship of the Different Geospatial Technologies G e o m a t i c s Remote Sensing Surveying GPS GIS Cartography Application Fields 45

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