2. 1. Introduction
2. Components of GIS
3. Components of Maps
4. Information in a Digital Map
5. GIS Applications in Urban Planning
6. Conclusion
3. • GIS means Geographic Information System
•It integrates:
1. Hardware
2. Software
3. Data
•It is used for:
1. Capturing
2. Managing
3. Analyzing
4. Displaying
Geographically referenced information
6. Computer System on which GIS Software runs
Personal Computers to Super Computers
Scanner, Digitizer Board, Printers, Plotters,
etc. are the peripherals Devices
All information are stored in standard
Computer Formats e.g. JPEG, BMP, PDF, etc.
7.
8. GIS software provides the functions & tools to
handle GIS data
Examples MapInfo®, ARC Info®, AutoCAD
Map®, etc.
For low cost work MapInfo ®
For Extensive analysis ARC Info ®
9.
10. Data are the raw facts & figures
Geographic Tabular data can be collected
from Locations
Map objects can also be attached to Digital
data
DBMS is the effective way to store data
DBMS means Database Management System
11.
12. GIS user range from Technical specialist to
Administrator
Broadly 2 classes:
1. CAD/GIS Operator. Whose work is to vectorise
map objects.
2. GIS Engineer. Who query & analyze works.
13.
14. Map creation can be done by:
1. Automated raster
2. Vector Creator
3. Manually vectorised
4. Survey agency
16. Scale is used to show a portion of Earth’s
surface on map
R.F (Representative Fraction) is used to draw
map
Map scale denotes how much given area
has been reduced
Cartographers divide scale in:
1. Small-scale maps =1:1,000,000
2. Medium-scale maps =1:75,000 to
1:1,000,000
3. Large-scale maps = 1:75,000
17. It refers to how accurately the location &
shape of map features can be depicted for a
given map scale
As map scale decreases, map resolution
decreases
18. It covers Quality of source data, map scale,
drafting skills & width of lines on Ground
Fine drafting pen draws lines at 1/100 of an
inch
19. 1. Geographic Information, gives position &
shapes of specific geographic features
2. Attribute Information, gives additional non-
geographic information about each feature
3. Display Information, describes appearance
of features on screen
20. Planning of project
Make better decisions
Visual Analysis
Spatial Analysis
Improve Organizational Integration
21. GIS is useful in detailed
planning stage
Thematic maps can be
generated e.g. Soil
composition, Vegetation,
population density,
Topography, etc.
Surface Length, width & area
can be calculated
22. “Better Information leads to better decisions”
Information presentation, Planning inquiries,
Resolve border issues, etc. helps in wise
decisions
Query & analyze map data when required
23. Using DTM (Digital Terrain Modeling)
landscapes can be better visualised
Calculations such as potential lakes volume,
soil erosion volume, earthwork volume
(channels, dams, roads, landslides),
Hydrological modeling becomes easy
24. Identify trends on the data
Create new relationships from the data
View complex relationships between data sets
Make better decisions
25. Improved management
of the organization
resources by GIS
Technology
Interdepartmental
information sharing
Data can be used several
times
Increase in productivity
due to reduced data
redundancy, fast access
& information Reliability
26. GIS is a very versatile tool which can be
implemented for better Map creation
It gives us to query & analyze various
information
GIS Technology helps in taking better
decisions
Results in higher Productivity of an
Organization