The student should be able to apply traditional digitizing techniques in order to update existing layers or create new ones on-screen using other layers in the background of an editing process. The learning goals of this section are to be able to make all appropriate decisions in the digitizing process from beginning to end of a particular project. The student is able to use on-screen digitizing with images scanned from maps, photographs, or satellite data if suitable. The student should also be aware of accuracy issues dealing with these sources of data. Student understands appropriate situations where on-screen digitizing may be used.
Student can describe a real application of on-screen digitizing.
Will the background layers be other GIS layers or a scanned image of a photo or map. Some software allows scanned images to be used as a raster layer, others may temporarily register and transform the working data against the image. Enter the editing process and create a new layer with the same registration as an existing layer. Be familiar with the editing process to show the proper information on the screen. Set the editing environment for adding new features.