Map Scale Compass DC45-5B with Ruler System 1

Map Scale Compass DC45-5B with Ruler

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: -

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Features

1, professional usage: orientation, distance measuring, measuring slope, azimuth and pitching Angle measurement,

2, high quality compass with neck rope, portable and rugged
3, ACRYLIC material, about 2mm thick
4, Damping Dial: to keep the stability of the pointer, more suitable for outdoor

environment.
5, Accuracy: accurate and clear, there were 360 degrees azimuth Angle, outer ring is 64-00 system, Liquid filled in the compass for reliable readings.

Product details

Model: DC45-5B

Name: Professional map compass, ruler compass

Product Origin: China

Supply Ability: 10,000 pcs/month

Minimum Order: 50 pcs

MOQ for OEM package: 500pcs

Product Size: 112*62*17(mm)

Payment: TT or LC

Q: What factors affect the handheld GPS receive signal?: The United States Department of defense. A SA satellite signal to interference (the U.S. government for consideration of security of civil code of a called "selective availability (Selective SA Availability)" interference, to ensure the best protection system is effective. Because of the random error information added by SA in the navigation message, the positioning accuracy of the civil signal C/A code is reduced to about 100 meters. However, the use of differential GPS technology, the system error can be reduced to 10 to 15 metersTwo. Weather factors (including sunspots, bad weather, etc.) to reduce the intensity of the received signalThree. In buildings, vehicles, insulation paper, or metal shielding, GPS signal will be reduced or completely lost signal. In open spaces, GPS devices receive the best signal. .

Q: Can you buy a good handheld GPS in China? FiveTrouble master recommended several professional handheld GPS brand, in addition to handheld GPS can speed it? Thank you!!: The main function is to use navigation as long as the navigation function can be used

Q: Want to buy handheld GPS in Hongkong, I would like to ask what brand is better, the specific model? Where to buy? How much is the price? In the mainland can be used? More questions, thank you!: Basically what questions are like this, there are few domestic brands, low precision did not see any big price advantage, but high precision or cheaper than abroad, you belong to the individual leisure estimates do not need to read.

Q: Hand held GPS coordinate conversion method: 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: Jia Ming etre20 handheld GPS good: The new generation of the eTrex series is the first generation of user level receivers that can track both GPS and GLONASS satellites. GLONASS global navigation satellite system developed by Russian Federation, fully put into use. When using the GLONASS satellite, the average time for the receiver to lock the target is about 20% faster than GPS. And, when using both GPS and GLONASS, the receiver has the ability to lock more than 24 satellites as compared to GPS alone.

Q: Mobile GPS can replace professional handheld GPS: No, professional signal and positioning more accurate,Walk along the plots in a circle can measure the size and graphics trajectory, 550 yuan, USB charging, large capacity lithium battery, black and white screen to see the clear day for outdoor use.

Q: GPS handheld function to measure it?: It depends on what kind of GPS handset. Some machines have this feature.

Q: I am a handheld GPS precision is low, how to use to be able to improve certain accuracy: Look at the maximum accuracy of GPSIf the difference accuracy can reach 1cm you can connect CORS single base station and other network RTK way to achieve the corresponding accuracy

Q: How to hand GPS eTrex H data to the computer: "Shaanxi skmax navigation information Limited" GARMIN proxy (GARMIN official website can be found), contact (Xiao Hou) the hope can help to you, if you do not understand what we see on the Internet, may at any time, contact us!

Q: Ask how to select a google satellite map into a handheld Area GPS: If it refers to a professional portable handheld GPS, please ignore this answer.

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