1. The document discusses using PHP and MySQL to manage hydrodynamic flood models. PHP scripts are used to manipulate flood model meshes and results from the command line and present visualizations. 2. A PHP class library has been developed over 7 years to manipulate spatial data and store it in a MySQL database. PHP acts as an interface between command line tools to analyze and visualize flood modeling outputs. 3. Examples show how PHP can be used from the command line to generate meshes, run flood models, and create 3D visualizations of results to effectively summarize large, complex spatial datasets.