9.1 Overview of Mapping

You can access the some of the mapping capabilities in BenMAP by going to the Tools dropdown

menu, and choosing the GIS/Mapping.

In addition to the Tools menu, BenMAP provides several places where you can map the input

data that you are using for a particular analysis. Below, we provide examples of both types of

mapping. First, we discuss the display options and taskbar buttons which can be used in both

cases.

9.1.1 Display Options

After choosing the file or data type that you want to map, you must select the variable you want

to map, and how you want it displayed. Double-click on the layer name on the left-hand side of

the window. A small box will appear with the Display Options for the layer.

This box allows you to set the following options:

Variable. The drop-down menu lists all of the variables contained in the layer you chose. Select

the variable that you want to view. Note that each layer can only show one variable at a time.

Start Color and End Color. These are the colors that represent the gradations in the selected

variable. BenMAP uses 10 equal-sized increments for the variable, with a gradual transition

between the Start Color and the End Color. To change either color, click on the colored

square and select a new color.

Default Color. This is the color is used for values that fall outside of the range of the Min

Value and the Max Value.

Min Value and the Max Value. These options define the range of the selected variable and are

automatically set to the minimum and maximum of the variable. However, you may wish to enter

other minimum and maximum values, such as in the case where there is one outlier that is

dominating the color scale. For example, some urban grid-cells such as those in Los Angeles

have extremely large values. Since BenMAP creates 10 equal-sized increments between the

minimum and the maximum, it is not uncommon to have most of the grid values in just a few of the

increments. If you change the minimum and/or maximum values to exclude outliers from the color

scale, the outliers will then appear in the Default color.

 

 

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