Massachusetts Institute of Technology Department of Urban Studies and Planning 11.204: Planning, Communication & Digital Media Fall 2004 Lab 4: Using ArcGIS to Visualize Population Density Help Section ArcMap interface and elements Start ArcMap ArcMap is a part of the ArcGIS package. This program lets you create thematic maps. To launch ArcMap, from the Start Menu choose Start > Programs > ArcGIS> ArcMap. Wait a moment for it to launch. Open a ArcMap file When ArcMap first launches, you should see a "ArcMap: Start using ArcMap with..." window that prompts you to create or open a new map document. Click the option button "An existing map." If the file you want to open appears in the list below, click it to select and then click OK. If not, choose "Browse for maps..." in the box and launch the Open dialogue box shown below. In the Open dialog box, navigate to the MIT Server. Click OK.The window should look like the following. Open an attribute table Click on the layer (listed on the left) "Camtract.shp" to make it active. Then over the text, right click the mouse and in the pop-up menu, choose "Open Attribute Table." The attribute table for the "Camtract.shp" layer appears. (Optional: If you activate a single tract using "Select Features" function available in the "Tools" bar, the highlighted records are corresponding to the Census tract selected in the view window.)Open a Layout From the text menu on the top of the window, choose "Layout View" from the "View" menu. A layout view for finalizing your mapping work shows up. To go back to the work pane, choose "Data View" from the same menu. Choose View -> Layout View Layout View Close the document and ArcMap From the text menu "File", choose "Exit." (or simply click [x] on the top right) You will be asked whether or not save changes to the file "startup.mxd," choose No.Create your own map document Create a new document Start ArcMap by from the Start Menu choosing Start > Programs> ArcGIS> ArcMap. In the welcome window choose the option "A new empty map." (If the welcome window is closed, click the New Map File icon [looks like a sheet of paper] on the top left. Use "blank document" as your template.) Add data (layers) Click the "Add Data" icon, or right click on the "Layers" text and choose "Add Data" from the pop-up menu. In the "Add Data" dialogue, choose the data file that will be used in the exercise. Browse to the MIT Server\Data, select "camborder.shp" and click OK. A new layer, "Camborder," will be added, and the geographic features are automatically displayed. yNOTE: If you don't find the MIT Server\Data in your "Add Data" window, you have to assign the folder inour catalogue of ArcGIS files. To do so, click this icon in the Add Data window to open the "Connect to Folder" window, typein the MIT Server\Data" in the box, or browse to the data folder, then click OK. This process can take some minutes. Click on the square to the left to the layer name. The Cambridge border disappears. Click it again to make the box checked to show the polygon. We need to add more layers. From "the MIT Server\Data\" add "cambookstore.shp," "massmbtaline.shp," and "camtract.shp." We can select multiple layers in the adding layer window by pressing the "Control" key while clicking on files. Turn layers on and off, change layer draw sequence, and making a layer active We turn layers "on" and "off" (making them visible or invisible) by clicking the square to the left to the layer name. In order to make a layer active, we just need to click on the layer name in the left panel of the table of contents window. All layers are overlaid in a sequence. The sequence of the layers are automatically determined by the software. We can change the display sequence by dragging and dropping layer objects. You should experiment with the ordering of layers, as it has a direct impact on how the image appears in the view.This is an example of the result of switching the order of layers. How to Zoom/Pan Now take the opportunity to pan and zoom in the window. First, you may wish to enlarge both the main ArcMap window so that you can see more detail in the image (click [ ] box on the top right). Try clicking the following buttons in the "Tools" bar, then clicking in the map window: (If Tools bar is not there, go to "View"->"Toolbars"->"Tools" and turn the "Tools" bar on.) Zoom In - Click to zoom in on that location. Click and drag to zoom to a particular bounding box. Zoom Out - Click to zoom out centered on the location of the click. Fixed Zoom In - Click to zoom in without moving the map center Fixed Zoom Out - Click to zoom out without moving the map center Pan - Click and drag to pan around the map area. Zoom to Full Extent - Click and observe that ArcMap zooms to the full extent of the largest layer (i.e. massmbtaline). Zoom to Active Layer Right click the layer name and choose "Zoom To Layer" from the pop-up menu. The view is zoomed to the extent of the chosen layer.Zoomed to the extent of bookstore locations in Cambridge. Examining Attribute Data First activate the layer"camtract.shp," and click on the info ("i") tool in the Tools menu. Move the mouse onto the map window and click on the tract where MIT resides. You can locate this tract based on where the MBTA line runs. The attributes associated with this tract appear in a popup window. In the column area, we can read out the area value for this Census tract. How to set data frame properties At this point it is important to set a few properties for this data frame. From the View menu, select Data Frame Properties to change the name of the data frame from "Layers" to "Cambridge Overview", add in creation date and your name as creator in the pop-up window. Also in this dialog box you should set the "Display Units" to "Miles".Once you close the Data Frame Properties window, you should see that the name of the layers changes to "Cambridge Overview," which is shown in the table of contents window. How to set layer properties Activate the layer "cambookstore" then from the table of contents window, right click to open a pop-up menu, then select Properties to open a Layer Properties dialogue box. Click the General tab, and change the name of the layer to "Cambridge Book Stores". Change other layer names according to their contents. After this, we will find the new layer name shown in the table of contents (left side) . How to save a map document? Save your map document now. Go to the