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Use Of Computer In Data Processing And Mapping
What is the three forms of geographical data?
The geographical datas are available in analogue or digital form.
Use of Computer (Practical Work in Geography)
The mapping software: mapping software provides functions for spatial and attribute data input through on screen digitation of scanned maps.
A digitised map consists of three files. The extention of these files are shp, shx and def. The def file is dbase file that contains attributes data and is linked to shx and shp files.
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Carry out the following steps using
the given data set:
(a) Enter the given data in a file and store in ‘My Documents' folder
(Name the file as rainfall)
(b) Calculate the standard deviation and mean for the given data set using Function Wizard in Excel spreadsheet
(c) Compute coefficient of variation using the results derived in step (6).
(d) Analyse the results.
Represent the data given below using a suitable technique with the help of a computer and analyse the graph.
Cropping Intensity in India
|
yr_80s |
Cl_80s |
yr_90s |
Cl_90s |
|
1980-81 |
123.3 |
1990-91 |
129.9 |
|
1981-82 |
124.5 |
1991-92 |
128.7 |
|
1962-83 |
123.2 |
1992-93 |
130.1 |
|
1983-84 |
125.7 |
1993-94 |
131.1 |
|
1984-85 |
125.2 |
1994-95 |
131.5 |
|
1985-86 |
126.7 |
1995-96 |
131.8 |
|
1986-87 |
126.4 |
1996-97 |
132.8 |
|
1987-88 |
127.3 |
1997-98 |
134.1 |
|
1988-89 |
128.5 |
1998-99 |
135.4 |
|
1989-90 |
128.1 |
1999-00 |
134.9 |
What is a computer?
What are the types of computer?
Name the hardware units of a computer.
What is software?
Name the operations which take place in digital techniques of mapping.
What are the storage devices in a computer?
Write short note on ‘Central Processing Unit’.
Write short notes on RAM and ROM.
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