3. Urban & Regional Planning
• Mapping & updation of
city/town maps
• Urban sprawl monitoring
• Town planning
• Facility management
• GIS database development
Scope
Lyari Express Way – Section (Essa Nagri)
• Better decision support,
planning & management
• Rapid information updation
• Infrastructure development
monitoring
• Spatial information analysis
Benefits
4. Examples of hydrological applications include: ·
.wetlands mapping and monitoring, ·
.soil moisture estimation, ·
· determining snow-water equivalent, ·
. river and lake ice monitoring, ·
. flood mapping and monitoring, ·
.glacier dynamics monitoring (surges, ablation)
.river /delta change detection ·
.drainage basin mapping and watershed modelling ·
.irrigation canal leakage detection ·
. irrigation scheduling
5. Landuse / Landcover Mapping
• Monitoring dynamic changes
• Urban/Rural infrastructure
• Waterlogging & salinity
Scope
• Assessment of spatial distribution
of land resources
• Infrastructure monitoring
• Availability of usable land
• Future planning for better land
management for socio-economic
development
Benefits
7. Importance of remote
sensing
Remote Sensing allows data in locations that may be
inaccessible or too large for in situ approaches
Interplanetary studies are an excellent example of where remote
sensing is useful
• Sample and return missions are expensive and difficult
• Apollo missions were last fully successful sample and return missions
(Genesis was partially successful)
• Still, remote sensing was critical even in those missions to determine
where best to sample
Meteorological applications
• Probably the clearest example with the widest audience and daily impact
• Meteorological satellites cover large areas that are inaccessible
• Can cover these areas repeatedly to look for changes over time
National Defense
Resource Mapping
8. Advantages and Limitations of
Remote Sensing
The major advantages of remote sensing over the ground - based
methods are:
1.Synoptic view: Remote sensing process facilitates the study
of various features of earth's surface in their spatial relation to
each other and helps to delineate the required features and
phenomenon.
2.Accessibility: Remote sensing process makes it possible to
gather information about the inaccessible area when it is not
possible to do ground survey like in mountainous areas or
foreign lands.
3.Time: Since information about a large area can be gathered
quickly, the techniques save time and efforts of human beings/
or mass.
4.Multi-disciplinary applications: The data gathered by remote
sensing process can be used by the users of different
disciplines
like, geology, forestry land use etc.
9. Limitations of Remote Sensing Technology
1. Since resolution of the data from LISS-III is 23.5 M
the linear forest cover along roads, canals, bunds, rail of the
width less than the resolution are generally not be recorded.
2. young plantations and species having less chlorophyll
contents in their crown do not give proper reflectance and as
a result are difficult to be interpreted correctly.
3. considerable details on ground may be obscured in areas
having clouds and shadows. It is difficult to interpret such
areas without the help of collateral data.
4. variation in spectral reflectance during leaf less period
poses problems in interpretation.
5. gregarious occurrence of bushy vegetation, such as
lantana, sugarcane etc, often poses problems in delineation
of forest cover, as their reflectance is similar to that of tree
canopy.
