Q:How to set the handheld GPS related parameters and coordinate conversion parameters throughout the country

Three parameter test DX, DY, DZ, DA, DF after the conversion parameters of the five, must be prompted to enter the handheld GPS, while the input area of the central meridian longitude. E on behalf of the east longitude, projection ratio of 1, the deviation of things to the north and south of the deviation of 0, and set the unit for M. Enter these parameters, should be taken to the field test, check whether these five parameters are correct. The method is selected, vision, GPS receiving signal strength of the feature points in the field (such as linear object intersections, independent features, etc.) is the best stone control points were measured and compared with theory and find out the coordinates of these points. If the results of the comparison exceed the nominal accuracy of the instrument, the conversion parameters or the problems that should be found should be recalculated.

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

The same, but it is over. No practical significance.

Q:What is the difference between a hand-held GPS and a car's onboard navigator

Effect of GPS navigation handheld as vehicle, as the vehicle with what map, the hand-held GPS is mainly used for point positioning, measuring area, high precision, good anti 3, my understanding is that

Q:I am a handheld GPS precision is low, how to use to be able to improve certain accuracy

If you can join the CORS network, the accuracy of decimeter to centimeter level.

Q:Professional handheld GPS GARMIN (DR) how to use

Would like to use the function of handheld GPS purposes, the measurement of soil area, linear navigation, auxiliary fishing waypoint navigation point information, traffic data display, etc.

Q:The navigation module it is "selph" three generation? Another one I mainly use it to measure the land area, easy to use, the error is not big?I want to buy Magellan 500 do not know whether it is good to use

Professional handheld GPS only Magellan and set SIBAO

Q:How the German born handheld GPS Mu meter, I want to buy?

Brian GPS handheld measuring instrument type 30A is a German born Mu launched a new professional Mu instrument, using high sensitivity GPS receiver chip, GPS super signal tracking capability, satellite positioning easily.

Q:Handheld GPS and mobile phone GPS what is the difference?

The same: GPS main chip may be the same; can complete the GPS positioning;

Q:Jia Ming etre20 handheld GPS good

Jia Ming eTrex 20 has a microSD card slot and 1.7GB built-in memory space eTrex 20 allows you to store more user acquisition information, in addition to the map expansion slot, you can load the map of the global area of Garmin.

Q:Handheld GPS locator measuring accuracy is about how many meters?

The higher the accuracy, the higher the price. You can consult the Haida official website mobile MGIS mall