GEOG 307 Lecture Notes - Lecture 1: Foreign Key, Unique Key, Tuple
8 Feb 2020
School
Department
Course
Professor
Lecture 1- Introduction to Application of GIS (Jan 6)
GIS concepts overview
- GIS = tools that allow for the processing of spatial data into information, information
tied to and used to make decisions about some portion of the earth
- Components
o Data source → take the data and organize it → run analysis → create a map
o Analyze the data → map as a final processing of what you’ve done
GIS is a set of tool for discovery
- Map of Brooklyn with certain areas put in red/ yellow and green = redlining
o Parts in red are representative of certain people who live in certain
neighborhoods → less loans are given to those people
o Discrimination
o Law enforcements and housing would also use these maps to see who theyv
would arrest for quotas for parking violations
Document Summary
Lecture 1- introduction to application of gis (jan 6) Gis = tools that allow for the processing of spatial data into information, information tied to and used to make decisions about some portion of the earth. Components: data source take the data and organize it run analysis create a map, analyze the data map as a final processing of what you"ve done. Gis is a set of tool for discovery. Relational database (needs to be kept separate from spatial data) Data is stored as rows and columns of information. Key field: column with unique identifier for each record/ tuple. Primary key: field designated for efficient searching. Relational join: process of joining information on two tables using foreign key. Accuracy there is a defacto standard of most maps it is if you want to take any point: spatial data standard, smoothing problem where certain features end up disappearing.
