Map Layer

On the Map Layer window, you can choose map colors, data, styles and labels for display, and view or edit associated attribute data for your vector GIS layers (in ESRI Shape file format: *.shp).

The Map Layer window has three tabs on the left: Map File, Appearance, and Label.  The Map File tab shows the Shape file's name (*.shp), which you can change by typing the new name or clicking the "..." to browse for the file.  Unless the shape files are very large or shared among several WEAP areas, it is best to copy the shape files used by an area (including files associated with the Shape file, such as .dbf, .shx and .prj) into that area's subdirectory or a subdirectory within the area's subdirectory, so that they will be included with the area's data files in backups and copies you give to others.  

There are three types of vector Shape files: point, line and area (polygon).  The type of the current layer is listed below "Shape Type."  The number of items ("features") contained in the layer is shown below the type.  For example, the country layer (shown below) has 251 countries.

Each Shape file has an associated "attribute" table, which contains information about each feature in the layer.  (These data are stored in a file ending in .dbf.)  The structure of the attribute table is shown below the File Name.  Hover over a feature on the map for a quick display of its data (below the map); click on a feature in the map to see all of its data on the left (the example below shows information for Sudan).  The full attribute data table (one row per feature, one column per attribute) is displayed on the lower right side in the Split or Table view.  Click the Edit button above the table to be able to edit the attribute values.  

On the Appearance tab you can change how the layer appears in the Schematic.  The options vary depending on the Shape type (point, line or area):

On the Label tab you can select which column, if any, to use for labeling the features.  Click "Abcd123" in the Font box to change the font name, style or color used for the labels.  Set Size (%) so that the labels appear at an appropriate size.  If you have selected a column but do not see the labels, increase the Size (%) until they are visible.  However, for some features, you may not want the labels to be visible until you are zoomed in quite far, for example, in the Cities layer.  Experiment to see which size works best.  For line features there is an additional option to wrap the labels along the lines.

Menu Option: Schematic: Add Vector Layer, or, double click on the name of an existing vector layer in the list of background layers on the Schematic.