ProMark 500 Collects 5,000 As-built Sewage System Points in Six Weeks

Ermont, France, 2012 — GNSS speed and accuracy are achieving new levels of performance with the ProMark 500. In a recent application in the city of Ermont, a ProMark 500 was used in six-weeks time to create an as-built-plan of the city’s entire sewage system by capturing more than 5000 centimeter-level accurate effluent entrance points in x, y and z coordinates.

The job to collect the entire sewage system inventory consisting of all drains, entrances, manhole covers and slope and flow directions was to commence using a total station. However, when speed and productivity was deemed insufficient to complete the job on time, the chartered surveying company of Sarl, Picot and Merlini, which had no previous experience with GNSS equipment, acquired a ProMark 500 together with the MobileMapper CX field terminal and supplemented with a subscription to the Orpheon reference station network to complete the work on time.

Work proceeded very quickly according to Alain Merlini, lead field engineer, because of the “mobility, easy-of-use and very fast initialization of the ProMark 500.” Merlini added that he was “amazed how well the receiver tracked signals even under bridges and tree canopy.”

The ProMark 500 offers access to three constellations (GPS, GLONASS and SBAS) through its embedded BLADE technology that provides a unique patented way to use multiple GNSS constellations for high-accuracy positioning. BLADE also insures fast initialization and long-range accuracy. The ProMark 500 offers robust signal tracking, advanced multipath mitigation, high availability of satellites in difficult conditions, and field replaceable batteries that last a full workday. Spectra Precision dealer Georges Pauchard, Mesures et Systemes, headquartered in Chantilly, provided the ProMark 500.

About Sarl, Picot and Merlini Surveyors

Headquartered in Eaubonne, with offices Pontoise, Gonesse and Noailles, and a staff of 15, the firm provides a wide range of survey services including boundary marking, land property divisions and surface measurements of flats.

About the Ashtech Brand

Recognized as an industry leading brand, Ashtech has been developing GNSS technology for more than 25 years. Ashtech is the creator of BLADE technology, which is a unique method for using multiple GNSS constellations for high-accuracy positioning. Ashtech also introduced the MobileMapper series of products for GIS and mapping, as well as the ProFlex™ 500 and ProMark™ series, including the ProMark 500, ProMark 200 and ProMark 100, a well-recognized GNSS land survey product line currently on the market.

Following the recent acquisition of Ashtech by Trimble, the Ashtech teams, GNSS solutions portfolio and distribution networks are now part of the Spectra Precision Business.

For more information on Ashtech, visit:

About the Spectra Precision Brand

Spectra Precision has long been an established brand, known for delivering quality products to the construction market. Focusing on the specific needs of the conventional surveying market, the Spectra Precision brand offers a complete product portfolio including Global Navigation Satellite Systems (GNSS), Global Positioning Systems (GPS), optical total stations, data collection hardware, field and office software, as well as a wide range of construction tools.

Spectra Precision surveying equipment is an economical choice that utilizes technologies for optimal efficiency. With convenience and reliability as the foundation of the Spectra Precision brand, it is an ideal choice for value. The Spectra Precision brand is backed with the strong technical support that users have come to expect from a quality name in surveying and construction.

For more information on Spectra Precision, visit:

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