Q:What is the difference between professional GPS handsets and mobile navigation?

GPS is the most important positioning accuracy. Professional handheld machine with industrial design. First of all, if used outdoors, then fell, and so on are likely to water, and this thing is also very expensive, so the opportunity to have a high professional anti shock waterproof performance.

Q:What factors affect the handheld GPS receive signal?

Active ionosphere, large canopy, high voltage wire, high building.... Have influence.

Q:What is the difference between professional navigation and professional GPS navigator

You can understand the principle of the radio transmitter receiver radio information, is not charged. GPS only in the need to track and special needs, and through the GSM network data is to receive GPRS traffic charges. Upgrade the main map of the general manufacturers do not charge. Now there are many kinds of vehicle navigation systems, different brands and various functions....Now we have to find a good brand navigation.....I hear people say it's a good way...A Thunis brand navigator is a hot productNow to the car navigator has a lot of MP3, MP4 and other entertainment features,,,,Fixed speed, movement speed and other functions....It is best to have a rear view, and, more secure.... GPS Car Navigator, simply said, is the navigator can help users to accurately locate the current position, and according to the established objective calculation of stroke by map display driving auxiliary equipment and voice prompt two ways to guide the user to the destination. It includes two important components: one is the global positioning system (Global Positioning System) referred to as GPSSuggest that you buy a professional GPS, after all, the phone's function is to call.

Q:Is it accurate to measure highway mileage with GPS handheld

Can only say that the handheld GPS measurement of highway mileage can be a reference, if you want to measure the accuracy or sub meter level or professional measuring tools better

Q:I just bought a handheld GPS Magellan No. 1, showing the latitude and longitude coordinates, I want to set the geodetic coordinates of latitude and longitude, do not know where to set, I would like to ask you, how to set, there is a better picture shows the best, thank you so much.Magellan GPS 210 is not 2000 shy

2 map reference setting: [[map] - unit "benchmark is set to User, and input the DX, DY, DZ, DA, DF parameters, usually DX, DY, DZ vary from region to region, so need to know the high level control points to solve, solving methods are as follows:The handheld GPS is placed in the control point field buried pile, were measured, and then hand coordinate coordinates and the known control points of the GPS measurements obtained for the poor, can be obtained by local coordinates and elevation deviation value: DX, DY, DZ.

Q:Handheld GPS positioning, can be directly uploaded to the computer, and the computer has a scalable map to mark the upload point. The above system, now there are 20Such as the title, I want to achieve the final function: through the manual to a point, with a hand-held GPS locator will be recorded in the specific latitude and longitude, and sent to the network in real time, for my computer to mark these points on the map. If you can directly enter the site of some of the information, directly to the above is the bestIf you have the above equipment, please indicate the scientific name, and the specific application industry.Thanks.

The main function of Siwei Hin GPS map tag software1 support Google online (offline) hybrid satellite maps and general maps.2 support 1-18 level map arbitrary scaling, the left mouse button drag roaming.3 support the name of the query location, you can enter the location of the location after the location of the query.

Q:Highway measurement with GPS I do not know which of the base station settings and mobile station settings I are very vague, to the instrument to build a coordinate system how to build the relevant issues to me

For long tunnels, the conventional measurement of large bridges has the following limitations:1, long tunnels, bridges and other structures generally require the measurement level of four or more. With conventional measurement methods, often adopt the measure to increase the number of methods to extend the observation time, time consumption and labor consumption to try to improve the accuracy of.2, the long tunnel and bridge for the complex terrain region difficult, conventional control measure for visibility and network shape, often cut down the workload is quite large, so the measurement of the cost of a large, hard work.Link control network of high precision 3, long tunnel and bridge and low precision and route network, although with adjustment methods can be overcome, but because of the terrain conditions are difficult, the measurement workload to its connection, and is not too easy. In practical work, the control of the structure and the measurement of the route are often out of touch.

Q:GPS Mu meter which brand is good, handheld high-precision land area measuring instrument

A German born mu can also recommend a good precision measuring instrument.

Q:How to use the handheld GPS whole watershed investigation

Therefore, it is an important method to solve the maximum value in physics by solving the maximum and minimum values of the physical quantity by the critical state.

Q:I am ready to go to the field to go to college, but I do not know how to buy a handheld GPS, I hope you recommend. The most important thing is easy to carry.

At present, the formal channels genuine licensed not so cheap, some refurbished machines may have. The cheapest machines now have about 900-1000!