Map Scale Compass or Ruler Compass DC40 System 1

Map Scale Compass or Ruler Compass DC40

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: -

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Product details

Model: DC40-3A

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: 126*60*10 (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.

Payment term: TT/ LC

Q:GPS handheld function to measure it?: It depends on what kind of GPS handset. Some machines have this feature.

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:Handheld GPS need to put the phone card?: Travel GPS professional solutions:Put card. Will be equipped with a card at the time of purchase.

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!Is mainly used for tourism, I said is not a mobile phone, is a more professional handheld GPS navigator for travel outside! Handheld GPS navigator can voice navigation?: 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: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:Jia Ming etre20 handheld GPS good: Jia Ming ETREX20 compact portable, solid and rigorous work design, precise positioning, functional improvement, for out of work, travel friends can be used as a reference.

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: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:Highway measurement with GPS I do not know which of the base station settings and mobile station settings I are very vague, to the instrument to build a coordinate system how to build the relevant issues to me: If you are a GPS base station location and measurement of road staff recommend that you use the professional version of the GPS version of the great error because you said is also a way of positioning is not accurate the coordinate system should also use professional equipment and operating personnel want to help you

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