Guided Tour: Rate Tables
Unlike MapPoint®, Maptitude® does not have its own driving cost calculator. However, MileCharter for Maptitude supports the same custom rate tables as MileCharter for MapPoint. These are more sophisticated than MapPoint's built-in cost model, and specify different rates for different mileage ranges.
MileCharter rate tables specify costs (or rates per unit distance) for different route distances. These cost options are particularly useful if you wish to calculate the costs to charge a customer. For example, many businesses charge delivery costs according to distance ranges, eg "$50 for delivery with 20 miles". MileCharter lets you specify a particular cost schedule using the Rate Table function. Rate tables let you specify the cost in fixed bands, or on a per-mile rate for each band.
Rate tables are specified using a text file with comma, space, or tab separators. This example was created in Notepad, but you could also create one in Excel® and save it as a "CSV" file.
The first column specifies a distance, and the second column specifies the rate to apply for the preceding distance interval. In this example, the rates are "per mile", but you can also use these tables to specify absolute costs for the route (ie. "deliveries of 5-10 miles cost $10.00").
Enable rate tables by checking the Costs via Rate Table check box on the main MileCharter panel. This will enable the Rate Table button in MileCharter. Press this to display this dialog box to set the rate table options. We need to specify the rate table file, and set the type of rate table.
There are three different ways of applying the rate table. Here, we apply the "per mile" rate to all route miles. Ie. A distance of 100 miles has a rate of $0.37/mile, so the final cost is 100x0.37=$3.70
Here are some route distance results. The axes have been swapped for clarity. This is performed using a checkbox on MileCharter's main panel.
Here are the corresponding route costs. MileCharter applied the above rate table to the distances to produce these costs.
Route costs can also be computed by by using different rate costs for different road types, in a similar manner to how the road speeds are specified. For example, you might set streets to be $0.50/mile but Interstates are $0.40/mile. All of these road type parameters (absolute road speeds, road speed adjustments, and road costs) can saved to a road parameter file, allowing them to be shared between projects and colleagues. This same file can be used with MPMileage for Maptitude.
Next, we look at the MileCharter's ability to only report the closest destinations.