Transparant Map Scale Compass DC47-2

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Product details

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

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:GPS method for highway survey?
Defects of conventional measurement methods:1, the specification of the length of the attached wire, the length of the wire and the length of the wire between the nodes have strict requirements, generally for high grade roads are required to meet the requirements of the first line. In this way, the length of the wire shall not be more than 10 km, or the length of the wire shall not exceed the length of the wire attached to the attachment of the wire length of 0.7 times. This requirement is generally difficult to achieve in the actual work, often appear super standardized operations.2, to collect the starting point for the general route of measurement and control is difficult to ensure the same measurement system, the measurement and measurement, often in the city of control points mixed together, the compatibility between systems, if the starting point is not compatible, is bound to affect the quality of measurement.3, serious damage to the national site, the impact of measurement operations. Due to the country's basic control points, mostly completed in 50s and 60s, after more than 30 years, some point due to the needs of economic construction is destroyed, and some people because of the lack of knowledge of human destruction. Route survey work in these areas, often in the 50 km above all can not find the wire control points. The quality of the route control survey is not guaranteed.4, ground visibility difficulties often affect the implementation of conventional measurement. The control points of the general route shall be located within 300 meters from the course. Due to visibility reasons, it is difficult to meet the conditions, even in a large range, and the dense shrub forest area, simply can not implement conventional control measure.
Q:Trouble Hongkong friends come in! About Hongkong buy handheld GPS!
Specific model depends on what you are doing, almost two thousand or three thousand of the words can be. Good point is four thousand to six thousand.
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:What is the difference between the phone's GPS and professional handheld GPS features and differences?
If you travel enthusiasts so you still recommend buying the handheld bar dry batteries can be replaced immediately if it is built in deep mountains and forests where you go oh for charging software installation, you can go to the forum to see the relevant system is very simple and the most important point is that basically all the navigation software has cracked the free version allows you to use it here and I hope to help you
Q:What qualifications should a normal GPS locator have?
Patent, business licenseLook what kind of
Q:I would like to ask the outdoor adventure GPS are required to have what functions, a good GPS all aspects of the parameters are?
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.
Q:What is the difference between industrial GPS handset and mobile navigation
I am a professional to do GPS, the difference between the professional handheld and mobile GPS is very understanding, here and your simple communication.1, GPS is the most important positioning accuracy and confidence. Professional handheld GPS chip used to stabilize the performance of some, the accuracy will be better, such as Garmin handheld high-end product positioning can be achieved within 3 meters, while the phone's GPS chip is different.2, both in the design and positioning of the crowd is very different. Professional GPS more focus on outdoor industry and users, the use of design idea is how to better outdoors, outdoor tourism including tourism exploration assistant very full function, and mobile phone GPS is a trend not only, what purpose.
Q:Handheld GPS settings.
Latitude and longitude is the geodetic coordinates, the landlord said to be set up for the use of the projection plane Cartesian coordinates - Beijing 54 or Xi'an, the 80 plane rectangular coordinates it.1 position: [format setting unit - "[] position display format is set to User UTM Grid, and enter the relevant parameters, such as the 3 degree or 6 degree with the area with the central meridian projection, the ratio was 1, that deviation is 500000m, north-south deviation is 0.
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:I bought the way k20s, this handheld GPS how
Choi way handheld GPS feel that you can also be in the last year, the Zhengzhou Bureau of Surveying and mapping seems to be called the wide Han instrument that home to buy, so there is no problem with it, the price is not expensive.

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