Transparant Map Scale Compass DC45-5B

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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)

Color: OEM

Features

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

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Q:Handheld GPS market which there are several models can be used to measure the land area
A type specific.GPS chip area measurement is the most "selph" 3 generation, special machine is very good, the error is very small.
Q:Hand held GPS coordinate conversion method
By the 84 coordinates to Beijing 54 Coordinate. A collection of application area of high grade control data in GPS receiver applied earth area (such as a county) find three (or more) uniform grade (accuracy better) or GPS "B" dot, point the best is around without interference of electromagnetic wave, vision, satellite signal. To the local surveying and mapping management department (such as: the local bureau of Surveying and mapping, surveying and Mapping Institute) Gauss plane coordinate copy these points of the Beijing 54 Coordinate System (x, y), the elevation of H and WGS-84 coordinates of the geodetic coordinates (B, L), the high H.
Q:How about the accuracy of the GPS handset?
zhonghaida Qmini series: 3 meters; zhonghaida Qcool series: 5 meters; precision and price is proportional to the precision is higher, the higher the price.
Q:Who can recommend me a table under the professional GPS software
SOSO map is good, I use this.Kelid navigation is also good.
Q:Handheld GPS settings.
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 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:Handheld GPS navigation is what? Where to buy handheld GPS navigation, how to select GPS navigation?
Handheld GPS navigator, also known as portable navigator, but also divided into 2 kinds, one is the ordinary PND navigator, you can go to Zhongguancun, the major appliance stores to buy, and the other is the mobile navigation, GPS smart phone is installed in the GPS navigation software can be,The navigator is composed of 2 parts: hardware and navigation software. The navigator on the market is about RMB 600. The brand of Kelid navigation software is usedGPS is a portable handheld navigation navigation products, the market is now very much, most car navigation can be used, the Gps signal is still free to receive satellite signals in the United States, you only need to charge it, map to the sellers in general can be upgraded.
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:The future of GPS? Who can tell me professional, humane business prospects,
1 power, telecommunications, telecommunications and other network time synchronization2 accurate timing of admission3 accurate frequency of admission1 geodetic measurements of various levels2 Road and various line lofting3 underwater topographic survey4 crustal deformation measurement, dam and large building deformation monitoring5.GIS application6 construction machinery (tyre crane, bulldozer, etc.) control7 precision agricultureAt the present stage, it is mainly used for the security of vehicles and the management of personnel vehicles. With the continuous development of social economy, more and more vehicle users, GPS will gradually get wide application, on the stage of the car is enough for your service. Prospects can still be Lin Shijie GPS
Q:GPS handheld function to measure it?
Depends on the accuracy of the range you require, if the accuracy of the 3-5 meter can be used for ranging, measuring area, latitude and longitude, elevation information, etc.

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