Lesson: Remote sensing imagery

molassesitalianΤεχνίτη Νοημοσύνη και Ρομποτική

6 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

112 εμφανίσεις

Lesson:
Remote sensing imagery

Zirek Malikova

OShTU, Software Engineering Department

zirek.malicova@mail.ru



Module:
Data Acquisition and data interpretation

Objectives:

1.
Definition of remote sensing.

2.
Basics of remote sensing.

3.
Remote sensing software.

4.
Tasks for students.

5.
References.



What is 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."



[
A Canada Centre for Remote Sensing Remote Sensing







Tutorial
]


Basics of remote sensing


Physical basics


Satellite systems


Visual image interpretation


Image processing and enhancement


Classification techniques



Physical basics



electromagnetic spectrum,


radiation and absorption principles,
atmospheric influences


Energy interpretation with earth surface
features


spectral reflectance properties
The electromagnetic spectrum

Energy Interaction with Earth Surface
Features

Specular and diffuse reflectance.


Satellite orbits


Geostationary orbit

(METEOSAT)



Synchronous (polar)

Orbit (LANDSAT)

Satellite sensors

Active sensors


Passive sensors

Resolutions


Spatial


Spectral


Radiometric


Temporal

Spatial resolution


Low resolution:
larger 30 m


Medium resolution:

2
-
30 m


High resolution:
under 2 m

Spectral resolutions

LANDSAT and SPOT spectral resolution


Visual image interpretation

1. the recognition of objects

2. a true interpretation

Schematic presentation of the Interpretation Process.


Image enhancement



Histogram Stretches



Filter


Image classification

Unsupervised Classification


Supervised Classification


The classification

process

Remote sensing software


ERDAS




MapInfo


ESRI


AutoDesk


IDRISI


RemoteView


Open source



GRASS GIS


QGIS


OSSIM










Tasks for students

1. How can we do image interpretation in QGIS?

References


1.
http://www.seo
-
sproject.eu/modules/

remotesensing/remotesensing
-
c01
-
p01.html