Acrylic Map compass DC45-5A

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Product details

Model: DC45-5A

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: 109*61*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: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:Professional GPS handheld and mobile navigation difference
Design ideas and the use of different objectsThe handheld is designed for military, mapping, mining, agriculture, outdoor sports (hiking, hiking, orienteering, cycling, water sports, paragliding, etc.).Cell phone navigation is designed to drive a car in the city, built-in interest points are mostly concentrated in the city.
Q:I would like to ask, handheld GPS (set SIBAO) and land use of the RTK, this error is 20 meters?
GPS was in error with 10 meters, with the star search results, related to the environment, if the precision is high, as long as the use of handheld GPS submeter or handheld RTK
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:Ask how to select a google satellite map into a handheld Area GPS
The ordinary mobile phone GPS, can install Orville interactive map support pre download any regional satellite map, support for offline use
Q:Handheld GPS settings.
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 0.2 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 and mobile phone GPS what is the difference?
The same: GPS main chip may be the same; can complete the GPS positioning;
Q:Handheld GPS purchaseHandheld GPS navigator!
The more high-end is good, clever and wheat zalun, many outdoor enthusiasts are used to this, hiking, cycling and other applications are relatively wide, is an American brand, Mazelen returned to the U.S. Army GPS, and as Ma Ying-Jeou ring when riding on the handlebar also puts a high out of this two 60CSX. the brand in the nature, the price is more expensive, in more than 2000, but the best is to the store to buy.
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:What is GPS Mu meter ah, with the general said that the GPS measuring instrument what is the difference?
If it's just a GPS meter and a GPS meter, that's a thing.If the measuring instrument, it is not the same with the measured mu instrument.In fact, these GPS is actually said handheld gps.It is used in measuring area and used in agriculture, forestry and animal husbandry.Handheld GPS generally have the function of measuring area.For example, Magellan, Gao Tianxiang handheld GPS etc. These are very famous, each model has the function of measuring areaWe have some stores!

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