1. Bringing Geographical Location To Web By P.Hema

2.  HOW? GGIS >>> Geographical Information system GGOOGLE EARTH >>> A magnificent satellite view

3.  GOOGLE EARTH Geo- Mapping software application Formerly called -“KEYHOLE” In short it brings “ENTIRE PLANET” to your PC

4.  W W W What can Google Earth do?  Features of Google Earth

5.  Discovering Asteroid Impacts The first crater as seen from 20 km distance

6.  Discovering Asteroid Impacts View of second crater from 5km distance

7.  What is GIS  “Roger Tomlinson”-father of GIS  It is capable of Integrating Storing Editing Analyzing Display geo-referenced information

8.  Technical Aspects of GIS DATA CREATION DATA REPRESENTAION DATA STRUCTURES IN GIS -PointPoint -lineline -PolygonPolygon

9.  Technical Aspects of GIS DATA CAPTURE PROJECTIONS COORDINATE SYSTEM & REGISTRATION

10. SPATIAL DATA ANALYSIS WITH GIS

11.  SPATIAL DATA REPRESENTAION  Managing collections of spatial objects  “SPACES”  R* tree implementation  Design Principles

12. Space (S) --------------------- Insert (SO) Remove (SO) Retrieve (SO) Spatial Object (SO) ----------------------------- Contains (SO) Intersection (SO) Distance (SO) Clone () :SO Bounding Box (BB) ---------------------------- Contains (BB) Intersection (BB) Access Method (AM) -------------------------- Insert (SO) Remove (SO) Retrieve (BB) GEO TOOLKIT KERNEL 1:n

13. Group CurveSurfaceSolid TetrahedronTriangleSegmentPoint Rep Point BoxPlaneLine Poly LineTriangle NetTetra Net Spatial Object Class Hierarchy User defined 0D 1D 2D3D

14. R* Tree Oc Tree Access Method Class Hierarchy User defined Access Methods

15.  Architecture for storing complex spatial types

16. DATA MODELING -Depicting 2D & 3D characteristics of the earth’s surface TOPOLOGICAL MODELING - Analyzing spatial relationships that exist within digitally stored spatial data.

17. CARTOGRAPHIC MODELING CARTOGRAPHIC MODELING A GIS map consists of multiple layers of geographic data

18. GEOSTATISTICS -Uses ‘GRAPH THEORY’ & ‘MATRIX ALGERBRA’ GEOCODING -Calculating spatial locations REVERSE GEOCODING -Returning an estimated street address

19. DDATA OUTPUT & CARTOGRAPHY GGRAPHIC DISPLAY TECHNIQUES GGIS SOFTWARE -Grass GIS -Quantum GIS -Map server -Open jump

20.  CONCLUSION  Valuable tool  Geographical education  Extending Applications

21. QUERIES??????

22. POINT IDX-CoordinateY-Coordinate POINT-130123.619782.0 POINT-230167.319745.7 POINT-334952.219648.1.

23. ARC Reference X- Coordinate Y- Coordinate NODE-130123.619782.4 NODE-230167.319745.7 VERTEX-330952.219648.1.

24. POLYGON Reference Attribute Pointer ThreePoint-1 X-CoordinateY-Coordinate 30123.619782.4 30167.319745.7 30952.219648.1 30123.619782.4.