Acrylic Map Direction Compass DC35-1B System 1

Acrylic Map Direction Compass DC35-1B System 2

Acrylic Map Direction Compass DC35-1B

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Product details

Model: DC35-1B

Name: Professional map compass, ruler compass

Product Origin: China

Supply Ability: 10,000 pcs/month

Minimum Order: 30 pcs

MOQ for OEM package: 500pcs

Product Size: 84*55*11 (mm)

Material: Acrylic

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

Q:How to set the handheld GPS related parameters and coordinate conversion parameters throughout the country: Collect the 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" network, the best point is around without interference of electromagnetic wave, vision, the satellite signal is strong. 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: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:How do I still stay in the GPS navigation, GPS monitoring of the primary idea? FiveBusiness services, thank you!Future business services: Mainly for the ship, automobile, aircraft and other moving objects positioning navigation. For example:1 ocean navigation and incoming water diversion2 aircraft route guidance and approach landing3 vehicle autonomous navigation4 ground vehicle tracking and urban intelligent traffic management5 emergency rescue

Q:How to use the handheld GPS whole watershed investigation: Some people think that the use of critical state to solve the most value should be cautious, we must first distinguish the relationship between the two states

Q:How about the accuracy of the GPS handset?: Zhonghaida Q1:2 zhonghaida Q5:1 meters; meters; zhonghaida Q6: decimeter; zhonghaida Q8 cm;

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:GPS Mu meter which brand is good, handheld high-precision land area measuring instrument: A German born mu can also recommend a good precision measuring instrument.

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:What is GPS Mu meter ah, with the general said that the GPS measuring instrument what is the difference?: GPS Mu meter also known as land area measuring instrument, handheld meter meter, etc.. Integrated computational methods for understanding and intelligent high precision GPS positioning system, the precise area of the handheld computer system, can realize the irregular area of real-time measurement and dynamic graphical display and intelligent data processing and storage.GPS measurement of the meter is different from the general GPS measuring instrument is based on the latitude and longitude of its area calculation function, general GPS is generally used for positioning.

Q:Welcome to make comments on the existing GPS tour pal what shortcomings to answer the more detailed the better: The first three factors: ability as a good tour pal, sun and rain fearless tramp over mountains and through ravines Rulvpingdi, GPS, his nature can not be weak, small knock a small touch can not have temper, off or out in the water dirty, also to be able to continue the work. So the waterproof / earthquake / dust and other indicators become the primary consideration factors GPS these are the protective ability of vehicle GPS, most of them do not have, and some professional GPS design, there will be more conducive to the harsh environment, such as some of the products designed to be capable of floating after falling into the water. The outdoor need to step back. What is it, if you can not do to prevent flooding, then rain proof ability is the minimum requirement.

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