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ArcGIS is a program which allows the user to view and manipulate spatial data. It is useful in creating maps and displaying data spatially. This tutorial explains the basics of using ArcGIS, how to open and view a shapefile, and some simple ways to represent
information spatially. There are two major types of data that can be displayed in a GIS: raster and vector data. Vector data displays information as points, lines, and polygons. Raster data is stored as a continuous series of pixels. Vector data is stored with the file extensions .jpg, .tif, .gif., or bmp. Raster data is commonly stored as a shapefile (.shp), a format specific to ArcGIS.

Ordering Layers: The column on the left-hand side is called the Table of Contents and it displays a list of the layers in the map. The layers can be turned on or off by checking or unchecking the box next to the name. The order of the layers can also be changed by dragging the files up or down within the index.

Changing colors and symbols: ArcGIS randomly chooses colors for its layers. Your map will probably have different colors than this example, but the pink and orange in this map are difficult to look at. Click on the box just below the CANwat layer. The Symbol Selector menu will appear. You can change the color by selecting a box from the left hand side of the menu, or by clicking on down arrow next to the Fill Color box. A menu of colors will appear from which you can select.

Labeling Features: Also in the properties menu is the Labels tab. Select this tab. In the upper lefthand corner, select “Label features in this layer”. This box will allow you change the font and font size and the label style. The “Other Options” box allows you to set parameters for whether labels will overlap or not.

source:http://www.mcgill.ca/

Tags : upper lefthand corner, vector data, creating maps, mcgill ca, changing colors, label style, raster and vector, left hand side, label features, symbol selector, data displays, properties menu, continuous series, shapefile, different colors

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