Hermiston, Ore. ? Parked alongside his onion fields, Bob Hale can prop open a laptop and read his e-mail or, with just a keystroke, check the moisture of his crops.

As the jackrabbits run by, he can watch CNN online, play a video game or turn his irrigation sprinklers on and off, all from the air-conditioned comfort of his truck.

While cities around the country are battling over plans to offer free or cheap Internet access, this lonely terrain is served by what is billed as the world’s largest hotspot, a wireless cloud that stretches over 700 square miles of landscape so dry and desolate it could have been lifted from a cowboy tune.

Similar wireless projects have been stymied in major metropolitan areas by telephone and cable TV companies, which have poured money into legislative bills aimed at discouraging such competition. In Philadelphia, for instance, plans to blanket the entire city with Wi-Fi fueled a battle in the Pennsylvania legislature with Verizon Communications Inc., leading to a law that limits the ability of every other municipality in the state to do the same.

But here among the thistle, large providers such as local phone company Qwest Communications International Inc. see little profit potential. So wireless entrepreneur Fred Ziari drew no resistance for his proposed wireless network, enabling him to quickly build the $5 million cloud at his own expense.

While his service is free to the general public, Ziari is recovering the investment through contracts with more than 30 city and county agencies, as well as big farms such as Hale’s, whose onion empire supplies over two-thirds of the red onions used by the Subway sandwich chain. Morrow County, for instance, pays $180,000 a year for Ziari’s service.

Each client, he said, pays not only for yearly access to the cloud but also for specialized applications such as a program that allows local officials to check parking meters remotely.

“Internet service is only a small part of it. The same wireless system is used for surveillance, for intelligent traffic system, for intelligent transportation, for telemedicine and for distance education,” said Ziari, who immigrated to the United States from the tiny Iranian town of Shahi on the Caspian Sea.

American Onion Inc. farm unit manager Chris Monkman, of Pendleton, Ore., kneels in an onion field near watering pipes and uses a laptop with wireless capabilities in Hermiston, Ore. Even as the most developed cities in the nation struggle with whether to offer free Wi-Fi access, one of the most rural counties in the nation has succeeded in creating the world's largest hot spot, a Wi-Fi cloud that stretches over the wide open landscape in Umatilla County, Ore.

It’s revolutionizing the way business is conducted in this former frontier town.

“Outside the cloud, I can’t even get DSL,” said Hale. “When I’m inside it, I can take a picture of one of my onions, plug it into my laptop and send it to the Subway guys in San Diego and say, ‘Here’s a picture of my crop.”‘

Even as the number of Wi-Fi hotspots continues to mushroom, with 72,140 now registered globally, only a handful of cities have managed to blanket their entire urban core with wireless Internet access.

Hundreds of cities from San Francisco to Philadelphia have announced plans to throw a wireless tarp over their communities, and a few smaller ones such as Chaska, Minn., have succeeded. But only Ziari appears to have pinned down such a large area.

The wireless network uses both short-range Wi-Fi signals and a version of a related, longer-range technology known as WiMax. While Wi-Fi and WiMax antennas typically connect with the Internet over a physical cable, the transmitters in this network act as wireless relay points, passing the signal along through a technique known as “meshing.”

Ziara’s company built the towers to match the topography. They are as close as a quarter-of-a-mile apart inside towns like Hermiston, and as far apart as several miles in the high-desert wilderness.

Asked why other municipalities have had a harder time succeeding, he replies: “Politics.”

“If we get a go-ahead, we can do a fairly good-sized city in a month or two,” said Ziari. “The problem is getting the go-ahead.”