Uh… Locale does this without you having to do anything.

From the FAQ and Locale’s build in Help:

Move yourself to the location that you are interested in and create a new location condition. Wait for Locale to determine your location. Once the location is determined, notice the position of the pin and the size of the circle’s radius. This is exactly what Locale sees based on GPS, Wi-Fi access points, and cell towers in your area. Save the location without resizing or moving the pin. Once you save the situation, Locale should accurately detect your location when you are standing in this spot.
To improve accuracy with your own Wi-Fi access point, consider adding it to the location database. It may take about a week before Locale is informed of this update, at which point you’ll need to clear Locale’s Wi-Fi cache under Settings → Applications → Manage Applications → Locale → Clear Cache.

This is a great idea and we’ve been looking at it for quite a while. I agree it could be quite useful when combined with Astrid integration. For example, a location-aware reminder would be really useful a few minutes after arrival, rather than right when walking in the door.

A key requirement would be that the delay should be very consistent and predictable. For example, if I ask for a reminder 30 minutes after I get home, it should always be exactly 30 minutes after I get home. Thanks to Locale 2.0’s instant location, we are now be able to meet this requirement.

I have a few open questions about this as we go forward with investigating how this might work:

- Should there be delayed conditions? Or should this be implemented as delayed settings? (The end result would be the same, but each requires a different mental model) - How short or how long of a delay would people want?

UPDATE:

Locale 1.4 includes significant improvements to the location detection system, reducing time to detect location changes by 20% while also improving battery usage by up to 50%.

The original goal of this request—reducing the delay of detecting location changes—has been met as Locale 1.4 detects location changes within an average of 4 minutes. We are therefore marking this request as completed.

Although this request is being marked as completed, we have ongoing research and development to keep improving the speed and efficiency of the location detection system further :).

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(Original response)

By design, Locale has no user-configurable options. The goal is that Locale should “just work” without requiring users to fiddle with various options that could negatively impact the operation of the app. For example, asking Locale to check location every minute could cause the battery to drain within 2 hours at which point you might miss the train stop anyway.

Although a user-configurable option won’t be implemented, I see the underlying goal as improving how quickly Locale detects that location has changed. For Locale 1.3 and earlier, it can take up to 10 minutes for location changes to be detected.

I’m therefore repurposing this request for implementing improvements to the speed of the location detection system. Once these improvements are completed, a user-configurable update frequency will no longer be necessary.