Difference between spatial and Temporal data mining.

 Spatial Data Mining

  • Spatial data mining refers to the extraction of knowledge, spatial relationships and interesting patterns that are not specifically stored in a spatial database.
  • It needs space.
  • Primarily, it deals with spatial data such as location, geo-referenced.
  • It involves characteristic rules, discriminant rules, evaluation rules, and association rules.
  • Examples: Finding hotspots, unusual locations.


Temporal Data Mining

  • temporal data mining refers to the process of extraction of knowledge about the occurrence of an event whether they follow, random, cyclic, seasonal variation, etc
  • It needs time.
  • Primarily, it deals with implicit and explicit temporal content, form a huge set of data.
  • It targets mining new patterns and unknown knowledge, which takes the temporal aspects of data.
  • Examples: An association rules which seems - "Any person who buys motorcycle also buys helmet". By temporal aspect, this rule would be - "Any person who buys a motorcycle also buy a helmet after that."


Comments

Popular posts from this blog

Suppose that a data warehouse for Big-University consists of the following four dimensions: student, course, semester, and instructor, and two measures count and avg_grade. When at the lowest conceptual level (e.g., for a given student, course, semester, and instructor combination), the avg_grade measure stores the actual course grade of the student. At higher conceptual levels, avg_grade stores the average grade for the given combination. a) Draw a snowflake schema diagram for the data warehouse. b) Starting with the base cuboid [student, course, semester, instructor], what specific OLAP operations (e.g., roll-up from semester to year) should one perform in order to list the average grade of CS courses for each BigUniversity student. c) If each dimension has five levels (including all), such as “student < major < status < university < all”, how many cuboids will this cube contain (including the base and apex cuboids)?

Suppose that a data warehouse consists of the three dimensions time, doctor, and patient, and the two measures count and charge, where a charge is the fee that a doctor charges a patient for a visit. a) Draw a schema diagram for the above data warehouse using one of the schemas. [star, snowflake, fact constellation] b) Starting with the base cuboid [day, doctor, patient], what specific OLAP operations should be performed in order to list the total fee collected by each doctor in 2004? c) To obtain the same list, write an SQL query assuming the data are stored in a relational database with the schema fee (day, month, year, doctor, hospital, patient, count, charge)

Suppose that a data warehouse consists of the four dimensions; date, spectator, location, and game, and the two measures, count and charge, where charge is the fee that a spectator pays when watching a game on a given date. Spectators may be students, adults, or seniors, with each category having its own charge rate. a) Draw a star schema diagram for the data b) Starting with the base cuboid [date; spectator; location; game], what specific OLAP operations should perform in order to list the total charge paid by student spectators at GM Place in 2004?