When we were developing these new request capabilities, we wanted to set reasonable limits to prevent server overload while allowing the maximum flexibility to the system. For example, the larger the distances in the distance calculation, the less meaningful the buffer boundaries, since you will most likely end up with a circle. The more buffers you add to the Request Values list, the more time it will take to retrieve the answer from the server. With these thoughts in mind, these are the limitations we have imposed on the driving region requests:
| Value | Minimum/Maximum Limit |
|---|---|
|
Number of Request Values |
1 to 50 |
|
Size of Request Values |
Distance: Up to 280 mi or 450 km (with Major roads only selected) Up to 35 mi or 56 km (when using entire network) Time: Up to 4 hours (with Major roads only selected) Up to 30 minutes (when using entire network) |
|
Offroad Distance |
Up to 150 mi or 241 km |
|
Smoothing Factor |
1 to less than or equal to 100% |
|
Speed offroad |
Default is 15 mph or 24 km\h |
|
Propagation factor |
.01 to 1.0 |
|
Batch size |
1 to 50 records (2 is the default) |