1. LAND SUITABILITY UNDER R.S AND GIS
Persented by
hena parveen
Deptt.of soil science
Reg no BAU/D/SSAC/004/2016-17
2. LAND SUITABILITY
Land Suitability is the degree of appropriateness of land for a
certain use. Land suitability could be assessed for present
condition (Actual Land Suitability) or after improvement
(Potential Land Suitability).
Actual Land suitability is a land suitability that is based on
current soil and land . conditions, i.e. without applying any
input. The information is based on physical environment data
generated from soil or land resources surveys.
Potential Land Suitability is the suitability that could be
reached after the land is improved.
3. CONT..
o Land is a non-renewable natural resource, so it must be used
judiciously. Hence, it is necessary to prepare suitable
suggested land-use maps on a scientific basis to prevent the
deterioration of the land and the environment.
o The optimum land-use planning of a region should suggest
alternate land uses, primarily based on land characteristics
like physiography, soil surface and subsurface water
resources, natural vegetation, existing land use and socio-
economic conditions, without disturbing the ecological
balance of the region.
o Geographic information system (GIS) can serve adverse and
growing set of applications such as natural resources ,
environmental assessment and monitoring, deforestation
analysis and land capability/suitability mapping among others.
4.
5. DIGITAL SOIL MAP
Thematic soil map preparation by the use of latest Geo-
informatics technology is now in demand.
Knowledge of spatial variability in soil fertility is
important for site specific nutrient management (Patil et
al., 2011).
A thematic map is especially designed to show a
particular theme connected with a specific geographical
area. It provides:
(i) Specific information about particular location.
(ii) General information about spatial patterns and .
(iii) They can be used to compare patterns on two or more
maps.
6. CONT..
Is the computer-assisted production of digital maps
of soil types and soil properties.
Is prepared using geo-informatics technologies which
involve:
1. Remote sensing.
2. Global positioning system (GPS) .
3. Geo-graphic information system (GIS).
Different thematic maps are quantitatively produced.
7. HOW REMOTE SENSING SATELLITES WORK
Scientists have developed sensors and cameras which can
detect and record the energy transmitted from the surface of
the earth. These cameras and sensors are placed aboard earth-
orbiting satellites that record and transmit the data to receiving
stations on the earth in digital form.
Technologists use computers and other devices to produce
images that can be analysed and interpreted to obtain
meaningful information on conditions on the earth.
Remote sensing (RS) data are used for estimating biophysical
parameters and indices besides cropping systems analysis, and
land-use and land-cover estimations during different seasons .
RS data coupled with soil survey information can be
integrated in the geographical information system (GIS) to
assess crop suitability for various soil and biophysical
conditions.
8. GEOGRAPHIC INFORMATION SYSTEM
o Integrated hardware, software, and data for capturing ,
managing, analysis and displaying all forms of
geographically referenced information.
oIt allow us to view, understand, question, interpret, and
visualize data in many ways that reveal relationships,
pattern and trend in the form of Maps, Globes, Reports and
Chart.
o Land-use suitability analysis requires the use of GIS in
order to survey geographical suitability. This process can be
viewed through the techno-positivist and the socio-political,
public engagement perspectives. Within the analysis of
suitability there are also needed factors regarding economic
opportunity costs and social implications within particular
areas of land.
