INTRODUCTION AND REMOTE SENSING HISTORY Some Historical - PowerPoint PPT Presentation

Loading...

PPT – INTRODUCTION AND REMOTE SENSING HISTORY Some Historical PowerPoint presentation | free to view - id: 3b939f-ZDEyY



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

INTRODUCTION AND REMOTE SENSING HISTORY Some Historical

Description:

INTRODUCTION AND REMOTE SENSING HISTORY Some Historical Notes Remote sensing began in 1840 when balloonists used new camera technology to take pictures. – PowerPoint PPT presentation

Number of Views:1672
Avg rating:5.0/5.0
Slides: 28
Provided by: eocUkmMy
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: INTRODUCTION AND REMOTE SENSING HISTORY Some Historical


1
INTRODUCTION AND REMOTE SENSING HISTORY
Some Historical Notes Remote sensing began in
1840 when balloonists used new camera
technology to take pictures. At the turn of
the century there was a pigeon fleet in Europe.
2
Some Historical Notes
Camera systems were placed on V-2 rockets
tested at White Sands, NM after WW II. Sputnik
in 1957 changed our outlook toward using
outer space as a place from which to observe
the earth.
3
Milestones in the history of Remote Sensing
1800 Discovery of infrared by Sir William
Herschel 1839 Beginning of practice of
photography 1847 Infrared spectrum shown
by A. H. L. Fizeau J.B.L. Foucault to share
properties with visible light 1850-1860
Photography from balloons 1873 Theory of
electromagnetic energy developed by James Clerk
Maxwell 1909 Photography from
airplanes 1914-1918 World War 1 aerial
reconnaissance 1920-1930 Development
initial application of aerial photography
photogrammetry 1929-1939 Economic depression
generates environmental crises that lead to
governmental application of aerial photography.
4
Milestones in the history of Remote Sensing
1930-1940 Development of radars in Germany, US
UK 1839-1945 World War II application of
nonvisible portions of electromagnetic spectrum,
training of persons in acquisition and
interpretation of airphotos. 1950-1960 Military
research and development 1850-1860 Photography
from balloons 1956 Colwell research on
plant disease detection with infrared
photography. 1960-1970 First use of term remote
sensing, start TIROS weather satellite, Skylab
1972 Launch of Landsat 1 1970-1980
Rapid advances in digital image
processing 1980-1990 Landsat 4 new generation
of Landsat sensors 1986 SPOT French Earth
Observation satellite 1980 Development of
hyperspectral sensor
5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
Definition of Remote Sensing "Remote sensing is
the science (and to some extent, art) of
acquiring information about the Earth's surface
without actually being in contact with it. This
is done by sensing and recording reflected or
emitted energy and processing, analyzing, and
applying that information" (from Canadian Center
for Remote Sensing).
What is REMOTE SENSING ?
9
What is REMOTE SENSING ?
  • REMOTE SENSING includes all methods and
    techniques used to gain qualitative and
    quantitative information about distant objects
    without coming into direct contact with these
    objects.
  • Look-Look, NO Touch

10
What is REMOTE SENSING ?
  • Remote Sensing is a much wider field than we will
    discuss in this lecture series. We will
    concentrate on that part of RS dealing with
  • EARTH
  • LAND RESOURCES

Vision
Medical Imaging
Sound and Radio Wave Detection
11
What is REMOTE SENSING ?
eg. Camera
Sensor System
Source of Force Field
Resulting RS Data Set eg. Image
DATA ACQUISITION
Reflection
Object (generic)
12
What is REMOTE SENSING ?
DATA PROCESSING
Interpretation (secondary) Measurements Data
Processing Mapping (geometric) Presentation
of Processing Results Explaining deduced OBJECT
INFORMATION
RS Data Set eg. Image
Object(s)
13
(No Transcript)
14
(No Transcript)
15
What is REMOTE SENSING ?
  • Remote Sensing (RS) methods try to answer four
    basic questions
  • HOW MUCH of WHAT is WHERE?
  • What is the SHAPE and EXTENT of ... ? (Area,
    Boundaries, Lineaments, ...)
  • Has it CHANGED?
  • What is the MIX of Objects?

16
What is REMOTE SENSING ?
  • HOW MUCH of WHAT is WHERE?
  • WHAT
  • Type eg. water, vegetation, land.
  • Characteristic eg. temperature, concentration,
    state of development.
  • Properties of object eg. subtype, species,
    character and property as well as its abstract
    meaning.
  • gt DATA INTERPRETATION

17
What is REMOTE SENSING ?
  • HOW MUCH of WHAT is WHERE?
  • HOW MUCH determine by simple COUNTING,
    measuring AREA covered or percentage of total
    area coverage.
  • WHERE Relate locations and area covered to
    either a standard map or to the actual location
    on the ground where the object occurs.
  • NOTE WHERE also refers to a moment in time

18
What is REMOTE SENSING ?
  • What is the SHAPE and EXTENT of ? (Area,
    Boundaries, Lineaments, ...)
  • This extends the WHERE to be a completely
    GEOMETRIC problem. MAP PRODUCTION methods are to
    be applied to the analysis of RS information.
    These include
  • Photogram metric Methods
  • Identification and Delineation of Boundaries and
    Lineaments (Roads, Rivers, Fault Lines)

19
  • Has it CHANGED?
  • CHANGE may occur with progress of TIME.
  • Change may be detected through comparison of
    observed states at different moments in time.
  • gt CHANGE DETECTION

Land use change in Pulau Indah from mangrove
forest to industrial area
20
What is REMOTE SENSING ?
  • What is the MIX of Objects?
  • The surface of the Earth is covered by objects
    like Soil, Water, Grass, Trees, Houses, Roads and
    so on. These are GENERIC OBJECTS. We know these
    well, but we also know objects like Open Forest,
    Residential and Industrial Estates, etc. Each of
    these ABSTRACT OBJECTS are made up of a typical
    collection of Generic Objects.

21
What is REMOTE SENSING ?
  • What is the MIX of Objects?
  • One important task for Remote Sensing is to
    identify
  • GENERIC OBJECTS as well as
  • ABSTRACT OBJECTS within areas of interest
  • The following lessons will be devoted to
    techniques and methods as well as to the logistic
    for finding answers to the four basic questions.

22
What is REMOTE SENSING ?
  • (2) RS requires a SENSOR which can detect changes
    in the carried Signal.
  • Apart from our own eyes and ears, technology has
    provided us with a multitude of sensors operating
    in the detection of force fields microphones,
    geophones, photographic film, video cameras and
    photo detectors, radio wave receivers,
    gravimeters and magnetometers.

23
What is REMOTE SENSING ?
  • (3) RS requires RECORDING, ANALYSIS,
    INTERPRETATION and REPRESENTATION of the sensed
    information in a purposeful way.
  • This is a technique based topic. It is essential
    for the success or failure of RS in respect of
    its anticipated purpose.
  • This topic will be dealt with in its main
    aspects (but not completely) in the following
    lessons.

24
(No Transcript)
25
MANUFACTURE OF AIR BORNE REMOTE SENSING SYSTEM TO
EXTRACT THE QUANTITATIVE INFORMATION
26
(No Transcript)
27
(No Transcript)
About PowerShow.com