Basics
- Using Maps (from Wiley)
- Using Map Scales (from CUNY)
- How Globes Are Made (Chicago History Museum, YouTube video)
- Great Circle Distances (shortest distance between two points on a spherical surface)
Geoids (modelling the shape of the Earth)
Projections (putting a round object on a flat paper/screen)
- Map Projections (from USGS)
- Projections Illustrated (from ESRI)
- From Spherical Earth to Flat Map
- Picture Gallery of Map Projections
- Gallery of Map Projections
- Mean Sea Level, GPS, and the Geoid
Coordinate Systems (identifying location)
- How to Use a Geographic Grid (from Wiley)
- The World Coordinate Converter
- Latitude and Longitude (from WorldAtlas.com)
- Latitude and Longitude (from NASA)
- UTM Factsheet
- Using UTM Coordinates
- Metes & Bounds versus Public Land Survey System
- The Public Land Survey System (from NationalAtlas.gov)
- The Public Land Survey System (from Idaho State University)