Post on 31-Dec-2015
description
Projections I
Mills College 2009
SOC128 Geographic Information Systems and Sociological Geography
Outline
• What do you need to know going forward• Projections and coordinate systems
The Problem
http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/topic/com.ibm.db29.doc.spatial/csb3022a.htm
The Problem
• A “rectangle” on the earth’s surface…• …that is, a four cornered area aligned with
parallels and meridians
Awest, Bnorth Cwest, Bnorth
Awest, Dnorth Cwest, Dnorth
The Problem
Consider 2 Square Areas on a Map
Both are 1 unit x 1 unit
0
3
2
1
0
321
Credits