Professional Map or Ruler Mini-Compass DC47-2

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Features of DC47-2

1, professional usage: orientation, distance measuring, measuring slope, azimuth and pitching Angle measurement, drawing, a magnifying glass

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.

6, Magnifier function
5,ruler compass,
6,for map measure and drawing

7,one meter neck rope,

8,Liquid filled in the compass  for reliable readings,

9, magnifier function.

Product details of DC47-2

Model: DC47-2

Name: Professional map compass, ruler compass

Product Origin: China

Supply Ability: 10,000 pcs/month

Minimum Order: 20 pcs

MOQ for OEM package: 500pcs

Product Size: 125.5*60.5*10 (mm)


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Q:Handheld GPS buried in the soil there is a signal
It depends on how deep you buried the darker the GPS signal, and must ensure that the GPS antenna upward, the above can not be covered with metal objects
Q:Fuxin coordinates with the mapping of the seven parameters are what ah
Three translation parameters Delta X, Delta Y, Delta Z, three rotation parameter w X, Omega Y, Omega Z and a zoom M, these parameters need to be calculated in a fixed point under different ellipsoid!
Q:Handheld GPS which brand is good
Now GPS can also do handheld measurement accuracy, precision can usually reach decimeter level, the industry there are relatively well-known Huace, professional GPS measurement instrument, high precision of handheld GPS the good.
Q:What do you need to test for GPS?
5.DGPS you know, differential GPS (DGPS) positioning accuracy is very high, some GPS equipment providers set up a DGPS transmitter in some areas, free of charge to its customers, if customers are buying GPS receivers with DGPS function. The DGPS transmitter is a fixed GPS receiver (in a 100km ~ 200km exploration scene in the radius setting) receive satellite signals, it knows exactly what is the exact time of transmitting satellite signal to the theory, and then compare it with the actual delivery time, then calculate the "difference", influence this is very close to the atmospheric refraction, it will send out the difference, usually with FM (FM) radio data transmission using subcarrier modulation signal in the baseband receiver, GPS and DGPS function can receive and use it more accurate positioning.
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:Handheld GPS and mobile phone GPS what is the difference?
Different: antenna size, function, accuracy, protection level, and has been different in the application layer (handheld GPS support GPS compass navigation and map navigation and other more professional GPS applications);
Q:What is the difference between professional GPS handsets and mobile navigation?
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. You can see the Challenger I tour the next 600, three well plates.
Q:I would like to ask the GPS handset and GPS receiver (Surveying and mapping qualification application needs) is there a difference?
GPS handheld GPS operating manual, GPS receiver is to receive satellite signals, GPS consists of two components.
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:Trouble Hongkong friends come in! About Hongkong buy handheld GPS!
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.

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