Remote Sensing Remote Sensing is defined as the science and technology by which the characteristics of objects of interest can be identified, measured.

Remote SensingRemote Sensing

Remote Sensing is defined as the science and technology by which the characteristics of

objects of interest can be identified, measured or analyzed the characteristics

without direct contact.

Remote Sensing is defined as the science and technology by which the characteristics of

objects of interest can be identified, measured or analyzed the characteristics

without direct contact.

Types of Sensor: Types of Sensor:

Passive sensors

active sensors

Passive sensors

active sensors

The characteristics of an object can be determined, using reflected or emitted electro-magnetic radiation, from the object

Electro-Magnetic RadiationElectro-Magnetic Radiation

The sunlight's transmission through the atmosphere is affected by absorption and scattering of atmospheric molecules and aerosols

Interactions between Matter and

Electro-magnetic Radiation

-absorption

-penetrate

-reflection

Image Processing - CorrectionImage Processing - Correction

Radiometric correctionAtmospheric correction Geometric distortions of the image Geometric correction Coordinate transformation Collinearity equation Resampling and interpolation Map projection

Radiometric correction Atmospheric correction Geometric distortions of the image Geometric correction Coordinate transformation Collinearity equation Resampling and interpolation Map projection

Images Processed by NCC (National Cartographic Centre of IRAN)

Resolution:Resolution:

Spectral

Spatial

Radiometric

Temporal

Spectral

Spatial

Radiometric

Temporal

Applications of Remote Sensing Applications of Remote Sensing

Lineament Extraction

Interpretation

Height Measurement (DEM Generation)

Land Cover Classification

..……

Lineament Extraction

Interpretation

Height Measurement (DEM Generation)

Land Cover Classification

..……

IkonosIkonos

QuickbirdQuickbird

Satellites:Satellites:

1 -ArcGIS 1 -ArcGIS

2 -AutoDesk Map 2 -AutoDesk Map

Georeferencing & Drawing:Georeferencing & Drawing:

Adding Image to ArcGIS:Adding Image to ArcGIS:

Georeferencing:Georeferencing:

Start Editing & Drawing features:Start Editing & Drawing features:

Rubber Sheeting in Autodesk MAP:Rubber Sheeting in Autodesk MAP:

Drawing features: Drawing features:

Problems: Narrow alleys were not apparent clearly and needed to go under

field control.

Problems Narrow alleys were not : apparent clearly and needed to go under

field control.

Result: updating the maps of 140 cities. (Total covered area about 65000 hectares)

Result: updating the maps of 140 cities. (Total covered area about 65000 hectares)