Introduction to GIS for the Purpose of Practising PGIS On-screen Digitising By: Jon Corbett and Kasondra White Unit: M12U04

Introduction The process of extracting spatial features from a digital image These include: scanned maps aerial photographs digital photographs Useful for turning data into georeferenced map layers

Digitising Converting a paper map into a digital format Incorporating this into a GIS Also known as geocoding Points, linear features and areas often employ manual digitising Associating coordinates and topographical data Adapted from GIS Core Curriculum for Technical Programmes. Written by Lesley-Ann Dupigny-Giroux,Geography Department, University of Vermont. Trainers may wish to refer to this resource.

On-screen digitising Captures data from digital images using the mouse Grants a higher level of accuracy Allows for editing of features User creates the layer on the screen with the mouse Referenced information as a background Trainers may wish to open QGIS and demonstrate the process of creating and editing a new layer. Following this, trainers could invite trainees to discuss when on-screen digitising would be useful.