On The Navigation Map In The Information Point (point) Of The Quality And Quantity - Electronic Maps

The number has been optional Navigation Instrument are most concerned about the topic, but how much interest is required? Interest is PointofInterest the name and often referred to as POI, is a navigation map mark the contents of a class of facilities. Navigation map of the restaurant, Hotels , Tourist attractions, hospitals, parking facilities, are maps of the POI. Because the number of POI navigation map is the most easily accepted by users as a factor, so this year was a lot of navigation maps, navigation systems manufacturers are seizing this blasted propaganda. Impression or even millions of POI maps produced, and consumers in the lack of ability to judge the case of the map, and also the number of POI is approved. However, the standard measure of navigation map is not only simple POI, POI and not only quantity that simple. According to the Chinese Academy of Social Sciences in June

just released "Urban Blue Book" statistics, the domestic big cities in 118, 39 mega-cities. Who claims to have 10 million POI-level map, at least in every big city to collect millions of POI near it, think about it, really can be used from the Mainland. Even in Beijing, Shanghai, as China's largest city, would still be without access to so many.

Personal feeling, enthusiastic publicity POI number of manufacturers, and died a few years ago bit CPU frequency the same as those computer companies, aims to not familiar with these concepts, an urgent need for a quantitative standard of people. CPU's computing power, after all, rigid targets for a good navigation map, POI Quantity and Quality of Qi must be held.

Some may ask: POI What is quality?
I am saying is, POI have accuracy, availability, quantity makes sense. Currently still in development stage, government agencies, major factories and enterprises may not change the location information can point to those little hard to tell a POI, such as the smoke along the street of some small hotels, like this small POI today is that people who may weeks or even days after a different name, and some even changed, but so long as laundry rooms or restaurants. To know not to update the navigation map can be updated immediately, I will not speak to the navigation map produced from the collection, encryption, review, publication of a long period of time, just to send people to maintain that 10 million of POI points, not thousands collection of people with this team is not possible to maintain its accuracy, it was also learned that several major domestic enterprises have not a navigation map with the power. Accuracy is an important factor in the quality POI should pursue every P OI is a real and effective, which requires precise location of POI information accurately.

POI statistical methods may be different. Pursuit of the number of POI, it is estimated that some manufacturers will map into a number of POI POI do. This number is derived does not make sense. More importantly, the relationship between the POI and road, POI and POI smoothed relations between the smooth, this will be easy to use navigator. POI only speak of this quality.

In addition, the previous POI, only contain the name, location and classification. But now, the POI project also includes the business, telephone, hours, or even photographs. This increased the depth of POI information, and light from the quantity, is a measure not of this.

No accuracy and timeliness of the POI point for the navigation map user is there any significance?
access point vs router