The Precision Measurements' team is composed of land surveyors with a proven track record in:

3-D Laser Scanning / Modeling

Precision Measurements' has the capability of producing surveys with a level of detail and within the time frame's previously unheard of. Through the utilization of our 3D Scanning Equipment, PMI can produce surveys with millimeter precision. These surveys are performed through the use of high definition remote sensing. No longer is there the need to physically touch the item being surveyed.

Precision Measurements' technicians use the timed flight - pulsed laser system to take a 3 dimensional image of the item being scanned. Through the use of this system, PMI can effectively survey items with a high level of detail, from a safe environment. Items that previously had to be "touched" to obtain survey data from is now captured completely from a safe environment up to a distance of 200 meters away. The laser system sends multiple beams; the PMI technician predefines spacing of said beams, over the surface of the item being scanned. Each beam returns a signal to accurately define the surface of the item. In areas where a high level of detail is required the PMI technician defines a tighter spacing of the beams. Typically a beam spacing is in the order of approximately 1 grid pattern. Beam spacing can be defined at 1/32 of an inch if required.

The benefits to the transportation professional are immense. Existing structures can now have digital "As-Built" drawings with real world coordinate integrity in a timely and cost effective manner. High levels of detail can be provided without ever having to enter the travel lanes. The safety factor alone is an obvious heap forward from conventional technologies. Additional cost savings that result from PMI employing this methodology is attributed with not having to close lanes to perform these highly accurate surveys. As stated above, Precision Measurements operate from the relative safety afforded by being remote from the actual site of the survey. Whether this is from the cat-walk of a tunnel, behind the guard rail of a highway or being at or under a bridge, PMI technicians accurately capture the required information in safety.

Precision Layout in a Controlled Environment

PMI uses the industries most precise survey instruments to direct the placement of semiconductor producing systems. This machinery (tools) must be set to exact specifications due to the use of overhead automated delivery systems that transfers products throughout the different manufacturing areas.

Tolerances

Allowable tolerances for overhead automated delivery systems interaction with a tool's Load Port is approximately +/- 5 mm

Advantages of Using PMI

• PMI's specialized teams have the ability to work hand in hand with everyone involved with the placement of the tools from designers to engineers to millwrights and tool vendors to just name a few.
• Confidence. Customers can rest assured that each multi-million dollar "tool" is in the proper location, having to relocate a tool is time and financially expensive and some tools cannot be relocated after installation.
• While our survey personal are on site we are able to provide other services that may arise. An example of this maybe to provide typical construction staking outside of the clean room for items that may arise from the base build.
• Areas of concern within the clean room environment may be to align a part horizontally and vertically inside a tool in order for the tool owner to complete work on a damaged tool.

Deliverables

• PMI can provide the customer with exact coordinates of the location of each tool that has been installed in hard copy form or in a digital format.
• At each stage of tool setting our experienced survey team is there on location to give instructions as placement of the tool.
• Through experience, PMI has found that an initial set needs to be followed up with a final location due to movement at the tool is assembled.

Hydrographic Surveys

PMI is one of the few firms that can offer full service Hydrographic- Surveying services utilizing fully digital equipment.

Precision Measurements, Inc. has three hydrographic boats to perform its surveys. The first is a semi-enclosed 23’ boat. The other two are smaller open skiffs. This allows PMI the versatility to perform surveys in shallow water.

On-board these boats is an Innerspace 448 depth sounder connected to an Ashtech Z-Xtream GPS receiver capable of Real-Time-Kinematic (RTK) corrections. This GPS receiver is capable of centimeter accuracy. With this high-accuracy GPS, PMI is able to eliminate the use of a tide gauge. This method of hydrographic surveying is also used by the Virginia Department of Transportation's hydrographic section.

Except for the use of Real-Time Kinematic (RTK) GPS, PMI follows the operational procedures outlined in the Corps of Engineers Hydrographic Survey Manual. PMI also follows the procedures outlined in the Corps Manual for its quality assurance program.

The secret to PMI's success in providing a quality product in a timely manner is our unique process of hand picking key personnel that have experience, education and professionalism to make them leaders in their respective fields.

PMI prides itself on its highly trained, versatile work force. Our technicians are fully trained and experienced in all aspects of the surveying industry, from cadastral to geodetic surveys.

Precision Measurements philosophy of utilizing the latest in technological advances coupled with our particular attention to details enables us to maintain control over expenses and direct labor costs. PMI's commitment to digital data collection and in-house GPS capabilities, gives us the capabilities to perform surveys with fewer personnel and less man-hours.