Map Scale Compass DC47-2

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Model: DC47-2

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: 115*55*11 (mm)

Color: OEM


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

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

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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: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:Handheld GPS positioning, can be directly uploaded to the computer,
4 support coordinate query positioning, you can enter the coordinates of the value of the location of the query.5 support user defined information, advanced information query, real-time positioning results.6 support for the selected annotations on the map.
Q:GPS method for highway survey?
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:Magellan GPS handheld why so many people choose not to say that the map is not good
Magellan GPS handheld maps are not even, it is said that the map even money! No need ah.
Q:I bought the way k20s, this handheld GPS how
Ordinary hand-held GPS is 3-5 meter accuracy, high accuracy can be achieved unless buy submeter ordinary user, if you can.
Q:Who can recommend me a table under the professional GPS software
Taobao to enter the online shopping, mobile phone navigator on the line, I suggest you download the Careland navigation map, or tiger map
Q:GPS handheld function to measure it?
If the construction survey is certainly not the case, the control measurement is possible
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 GPS and GPS?
In fact, the main function is to use navigation as long as the navigation function can be used

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