Chapter 1: Comparison of DEM generated from UAV images and ICESat-1 Elevation Datasets with an assessment of the Cartographic Potential of UAV-based Sensor Datasets -- Chapter 2: UAV to Cadastral Parcel Boundary Translation and Synthetic UAV Image Generation Using Conditional-Generative Adversarial Network -- Chapter 3: UAV-based terrain-following mapping using LiDAR in high undulating catastrophic areas -- Chapter 4: Forest Fire Detection from UAV Images using Fusion of Pre-trained Mobile CNN Features -- Chapter 5: Deep Learning-based Improved Automatic Building Extraction from Open-Source High-Resolution Unmanned Aerial Vehicle (UAV) Imagery.