On August 8, 2019, Apple’s new map expanded to Texas, Louisiana, and the 43 southernmost counties in Mississippi:

This is the fourth time Apple has expanded its new map since its public launch in September 2018:

In June, Apple announced that its new map would cover “the entire U.S. by the end of 2019”:

With this latest expansion, Apple’s new map now covers 20.4% of the U.S.’s area...

...and 26.7% of its population:

It also now covers six full U.S. states...

...and seven of the ten largest U.S. cities:

At 347,931 sq mi, this latest expansion is Apple’s largest to date:

But Apple’s expansion seems to be slowing.

Apple’s second and third expansions were both 5x bigger than the expansions before, but this latest expansion is only 1.4x bigger:

And it took much longer:

In the time between this latest expansion and the one before, Apple announced that its new map would cover the entire U.S. by the end of 2019:

With 79.6% of the U.S. still to cover and less than five months left in 2019, Apple’s rollout is likely to accelerate. But what does this mean for the map’s detail? Will Apple cut corners to finish on time?

If anything, this latest update suggests the opposite: Apple’s new map seems to be getting more detailed as it expands to new areas. For instance, the resolution of Apple’s vegetation detail seems to have increased—and it’s now at the resolution of power lines:

Browsing Texas, Louisiana, and Mississippi, it’s relatively easy to find power line-related gaps in the vegetation—such as here:

And here:

But if you look at some of the first areas that Apple mapped, such as Northern California, you’ll have trouble finding similar vegetation gaps. For instance, here’s a major PG&E transmission line outside of Santa Rosa—but notice that there aren’t any vegetation gaps:

And zooming out, there aren’t any here either:

We see the same near Calistoga, where another set of power lines runs parallel to State Route 29:

And we also see the same near Windsor:

And Jenner:

More examples of Apple’s increased detail can be found inside of parking lots, where Apple now seems be mapping small pockets of vegetation. For instance, here’s a Sam’s Club store in Mississippi:

Another in Louisiana:

And one in Texas:

But if you look at Sam’s Club locations in some of the first areas that Apple had mapped, such as Northern California, you’ll have trouble finding this same level of vegetation detail. For instance, here’s the Sam’s Club in Vacaville, California:

And the Sam’s Club in Citrus Heights:

And the Sam’s Club in Roseville:

All in all, the resolution of Apple’s vegetation detail seems to be increasing. And equally stunning is all of the crop detail Apple has been adding:

Apple Maps’s data collection vehicles first visited the final parts of this area in April 2018:

Given that the map’s expansion has roughly followed the progress of these vehicles, it’s likely that the map will expand next to the Pacific Northwest, the Midwest, the Northeast, or the Southeast: