Changzhou Dadi Surveying Science & Technology Co., Ltd is a provincial-level technical enterprise in Jiangsu Province which is located in the Changzhou Development Zone. We specialize in state-of-the-art surveying equipment, including the application of infrared laser technology, the development of surveying software and the manufacturing surveying instruments. The main products of Dadi include: Reflectorless Electronic Total Station D30 Series (Distance Meter), DE Series (electronic Theodolite), DTM Series (Total Station), surveying accessories, covering all normal surveying equipment.

After a successful restructuring in 2006, the company's annual output value has grown rapidly at a rate of more than 50%. Our products are sold in 32 provinces, municipalities and autonomous regions across the country and are exported worldwide.

We have worked hard to become one of the most respected and well-known researchers and manufacturers of surveying science and technology instruments at home and abroad. In 2011, we were named a "Jiangsu Province High-tech Enterprise". We were consequently deemed a "Jiangsu Province Science and Technology Small and Medium-sized Enterprise" in 2013.

Our 20 years of experience in distance measurement has led us to venture past our development basis in surveying into other fields.  In recent years, we have vigorously carried out research in fields like image recognition, photogrammetry, industrial measurement, and laser scanning technology. In addition, we have strived to broaden the realm of possibilities for our high-tech surveying technology by finding new applications in different fields.

Equipment production

Equipment inspection

Equipment testing

With the enterprise spirit of "integrity, unity, hard work, and innovation", we continue to innovate and are dedicated to providing users with advanced technology and high-quality surveying products, as well as high-level and professional technical services.

The company pays attention to the construction and training of the R&D team, has established a complete R&D organization and management system, and has been accepted to the Changzhou Science and Technology Plan Project.

Our research efforts have resulted in successfully developing a series of precision measurement systems with independent intellectual property rights in the electric power, road transportation and industrial manufacturing fields, as well as in industry system solutions. We now hold 2 high-tech product certifications, 25 software copyrights, 7 utility model patents, 5 invention patent authorizations and 4 invention patent acceptances.

Dadi has a reliable national marketing and service network in order to assure the first-grade service quality. We ensure that we will provide feedback for our customers' requirements within a timely manner.