Introduction to Photogrammetry: Using Perspective Analysis to Infer the Trajectory of Incoming Munitions

Introduction to Photogrammetry: Using Perspective Analysis to Infer the Trajectory of Incoming Munitions. Armament Research Services (ARES). Table of Contents Introduction ............................................................................................................................... 6 Background to the Case Study .................................................................................................. 7 Perspective analysis ................................................................................................................ 10 1. Key concept: vanishing points .......................................................................................... 10 2. Locating vanishing points for reference ........................................................................... 11 3. Working with points ......................................................................................................... 13 4. Estimating Dimensions ..................................................................................................... 15 5. Working with geospatial data .......................................................................................... 21 Reverse Perspective Projection .............................................................................................. 23 1. Key concept: picture plane ............................................................................................... 23 2. Locating the viewpoint ..................................................................................................... 23 3. Transferring points ........................................................................................................... 24 4. Transferring more points ................................................................................................. 26 5. Calculating direction from the plan drawing ................................................................... 26 6. Extracting more information from reverse projection and plan drawings ...................... 27 Outcomes and Uncertainties .................................................................................................. 29 This Field Guide is intended to familiarise readers with the use of perspective analysis in conflict zones. It introduces and explains key concepts central to performing perspective analysis, including how to locate and work with vanishing points, estimation of dimensions, working with geospatial data, and even some introductory explanation and demonstration of reverse perspective projection.