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Lecture ERS 120: Principles of GIS - Part 3: Inputting Geographical Data

This lecture includes these contents: Inputting geographical data, digitising using real data, point the data, line the data, polygon the data,. Invite you to result this lecture. | Practice 3: Inputting Geographical Data ArcView Steps 13 Step 1 Point data . 13 Step 2 Line data. 14 Step 3 Polygon data 15 Step 4 Digitising using real data 16 In this practical you will discover how create your own geographic data - including; points; lines; and polygons. Firstly, you will need to start ArcView, start a new project, add a view and set the working directory (to c:\). ArcView Steps Step 1 Point data To create a new theme, go to the View menu and select New Theme – as illustrated below. From the resulting menu it is possible to create either a point; line; or polygon theme (see below). We will begin by creating a Point theme. You will then be asked for the location you wish to create the new theme in and the name of the resulting theme. Select the following location:- c:\point_trial. The theme has now been created but currently holds no information. The themes drawing Point_trial.shp check box has a Practice 3: Inputting Geographical Data ERS 120: Principles of GIS dashed line around it ( ) - indicating that it is in editing mode. To activate the pull down list hold the mouse pointer over the small arrow in the bottom right-hand comer and hold down the mouse-button. From the Drawing tool palette that appears (see diagram to the right) make sure the Draw Point tool is selected. Now click within the view to create a point feature. To add attribute data to the points - click on the Open Theme Table button ( ). When you create a new