This document provides an introduction to data collection and the General Transit Feed Specification (GTFS). It defines key terms like stops, routes, trips, and shapefiles. It discusses tools used like QGIS, PostgreSQL, PostGIS, and the shp2GTFS Python script for converting shapefile data to GTFS format. The document outlines the basic usage of these tools for collecting transit network data in layers and shapefiles using QGIS, storing it in a PostgreSQL/PostGIS database, and converting it to GTFS format.