Land Cover Investigation Using Landsat Satellites

Introduction

• Tools: Landsat satellites
• Data Collection: Different wavelengths (infrared and visible light- blue, green, and red)

Creating Images

• Combining Images: Any three images can be combined to create different Earth surface depictions
• Natural Color Image
  • Example: Landsat image of Florida
  • Uses blue, green, and red visible wavelengths
  • Appears similar to naked eye view from above

False Color Images

• Purpose: Highlight different land surface features
• Depiction Example: Multispectral data shows contrast between trees, shrubs, and marshes better than natural color images

Color Infrared Imaging

• Reflectance of Vegetation: Growing vegetation reflects a lot of near-infrared light
• Appearance: Healthy, growing vegetation appears red
• Use Case: Easier to distinguish healthy agriculture compared to true color images

Comparison of Depictions

• Different multispectral data combinations enhance different surface features in images
• Examples: Highlight differences in vegetation and land cover types