Geo-Spatial Analysis
Data Literacy
Geo-Spatial Analysis
Summarizing Reality
- Data attempts to summarize reality.
- Limits in that summarization.
- Problem = particularly clear with geospatial.
The Basics: Latitude and Longitude
- Longitude = X axis
- Measures distance from east to west
- Latitude = Y axis
- Measures distance north to south.
Why Projections are needed
- What is a projection?
- What is the issue with projections?
- Representing a 3d globe in a 2d plane
The Basics: Projections
- Projections are the way that we project 3d orientation to 2d.
- Standard Web projection is the Web Mercator: 3857
Projection Problems: Mercator Map
Projection Problems: Gall-Peters Projection.
Projection Problems: Goode-Homolosine Projection
Other problems: Calculating Coastlines
- What is the coastline paradox?
Coastline Paradox, cont.
Types of Maps: Placial and Spatial
- Placial map
- A map where the physical space occupied is not the central concern.
- Frequently attempts to summarize the data further for greater clarity.
- Spatial map
- A map where the occupied space is the central concern
