Spatial Query Language
Course RelationChapter 11- Object and Object-Relational Databases
Group No.15
Dhruv Dhokalia
Yash Khandelwal
MOTIVATION
• Databases required for data type rich applications such as:
- Spatial Databases (eg. Google Maps)
- Designing Databases (eg. CAD/CAM, 3-D printing)
• These applications require:
-Complex structures for storing data
-New data types- for images, videos & other multimedia
RDBMS Data types
ODBMS Data types
Char
Int
Date
Number
Varchar
Point
LineString
Polygon
MultiPoint
Spatial Data Types
OGIS- Open Geographic Information
System
OPERATION TYPE
OPERATION NAME
DESCRIPTION
Basic functions
SpatialReference()
Returns the underlined coordinate
system of the geometry
Boundary()
Returns the boundary of the
geometry
Touch()
Returns TRUE if the boundaries of
the two surfaces intersect, but the
interiors DO NOT
Contains()
Test if the given geometry contains
another geometry
Cross()
Returns TRUE if the interior of a
surface intersects with a curve
Distance()
Returns the shortest distance b/w
two geometries
Intersection()
Returns the geometric intersection
of the two geometries
Topological/Set Operators
Spatial Analysis
Spatial Query Example
CREATE TABLE Country(
Name Varchar(30),
Continent Varchar(30),
Population Integer,
GDP Number,
Shape Polygon);
CREATE TABLE River(
Name Varchar(30),
Origin Varchar(30),
Length Number,
Shape LineString);
Spatial Query Example(cont.)
Find the names of all the countries that are neighbors of
USA in the country table.
SELECT C1.Name AS “neighbors of USA”
FROM Country C1, C2
WHERE Touch (C1.Shape, C2.Shape)= 1 AND
C2.Name= “USA”;
Spatial Query Example(cont.)
List the length of all the rivers in each of the countries they pass
through
SELECT R.Name, C.Name, Length(intersection(R.Shape,
C.Shape)) AS Length
FROM River R, Country C
WHERE Cross (R.Shape, C.Shape)=1;
References
• Spatial Databases- A TOUR
By Shashi Shekhar; Sanjay Chawla
• Fundamentals of Database Systems
By Elmasri & Navathe; 6th Edition
• About 3-D Printing
http://www.3ders.org/3d-printing-basics.html
• Latest on 3-D printing
http://www.cnn.com/2013/11/08/tech/innovation/3dprinted-metal-gun/index.html?hpt=te_r1
THANK YOU