Use this dialog box to set up your Drivetime request.
Routing Server
Select the Drivetime server you want to access from this drop-down list. If the server you need to connect to does not display in the list, click the Servers button to add it.
Service URL
This field displays the URL location of the server indicated in the Server field. To retrieve more information about the selected server, click the Server Info button. This field is read only.
Servers
Click this button to display the Routing Servers List. From this dialog box, you can add, edit, or remove Drivetime servers. These can be part of your intranet or you can access them over the Internet.
Server Info
Click this button to display the details of the selected Drivetime server in the Drivetime Server Details dialog box.
Request Type
Indicates whether you are creating an isochrone (time buffer) or an isodistance (distance buffer) request.
Time
Select this button to do an isochrone analysis. When you select this option, select the time units for the analysis in the next drop-down list.
Distance
Select this button to do an isodistance analysis. When you select this option, select the distance units for the analysis in the next drop-down list.
Request Values
Use this list to display the request values for the selected time or distance operation and use the corresponding region style for the resulting geometry. The contents of this box change depending upon whether you select the Time or Distance radio button. When you select one option or the other the contents of the list update with the values corresponding to the selected operation.
The items in the list are always sorted in ascending order.
You can add or remove values using the Add and Remove buttons. You can also edit a value by double-clicking it and typing over the entry.
To change a region style, double-click the image to display the Region Style dialog box and make your changes in this dialog box.
To add a new value, remember these rules:
- Drive values can be in whole numbers or in decimals.
- If you enter text that cannot be converted to a drive value within the specified range, an error occurs.
- You cannot enter a drive value that already exists in the list.
- You can enter up to 10 digits.
Options
Use the options in this box to indicate the details of the network with which the analysis is to be calculated.
Use major roads only in calculation
Select this check box to use only the major roads of the selected network in the requested calculation. The network can include major roads only or all roads. A major road is a main road or highway. When you select this option you may get the results faster, but the accuracy of the results may decrease. This check box is always enabled.
When multiple drive values are defined
Select this check box to indicate whether the resulting time or distance buffers should overlap or not around the start point. Use this option only if you are requesting more than one value in this calculation. This check box is always enabled.
Create non-overlapping objects
Select this option to create drive value buffers that do not overlap.
Create overlapping objects
Select this option to create drive value buffers that overlap.
Advanced Options
Use these options to set the advanced options for the request.
Exclude holes from results
Holes are areas within the larger boundary that cannot be reached within the specified time or distance, based on the road network. Select this button to indicate whether the resulting geometries can contain holes. These pockets of territory are often neighborhoods of local roads that are hard to cross. This check box is always enabled.
Exclude islands from results
Islands are small areas outside the main boundary that can be reached within the specified time or distance. Select this button to indicate whether the resulting geometries can include islands outside of the primary region. These areas are frequently located off exit ramps of major highways. The results can include the islands as they are or ignore them entirely. This check box is always enabled.
Speed used for offroad travel
Use these fields to indicate the off-road network speeds where they are not specified in the Drive Values list. Offroad travel roads can be driveways or access roads, etc. The default value for this field is 15, but you can add any whole number.
The field is always enabled. The Unit drop-down list only displays when you choose an offroad network speed.
Limit offroad travel
Use this check box to indicate whether you want to limit the offroad distance used in the calculation. This option can be useful in preventing buffers that extend into areas that you cannot travel in (such as a swamp or body of water). It may be more efficient to use the Set Target and then the Erase Outside Target commands to clip the results and achieve the desired result. These commands are located on the SPATIAL tab, in the Edit group.
When you select the Limit off road travel option, the you can enter a distance value and its units. The default value for this field is 60, but you can enter any decimal value. This check box is always enabled. The corresponding field and drop-down list are enabled when you select the check box.
Include only point objects as input
Use this option to skip any table objects that are not points. No errors result. This option is not selected by default.
Reset options from connection
Use this option to return to the previous options from the current connection.
Smoothing factor
Use this slider control to indicate the smoothness of the polygon you have requested. MapInfo Pro uses this entry to calculate the percentage of the resulting points should display in the buffer. The lower the number the fewer the points and the shorter transmission times. You can specify a value between 1% and 100%. The corresponding static text control displays the current value. This bar is always enabled.
See also:
Using Driving Region Buffers to Display Data