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Craven Thompson & Associates, Inc.
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(20-07-01) Continuing Professional Consulting Services (CCNA)
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Craven Thompson & Associates, Inc.
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REQUEST FOR QUALIFICATIONS NO. 20-07-01 <br />CONTINUING PROFESSIONAL CONSULTING SERVICES (CCNA) <br /> <br /> <br /> <br /> <br />TAB D: PROJECT APPROACH AND UNDERSTANDING <br /> <br />GPS Surveys <br />We use GPS (Global Positioning System) equipment on almost all of the surveys we prepare. This <br />provides unified survey data that is easily brought into GIS databases with little need for adjustment. <br />Our equipment ranges from hand-held models with 3-meter accuracy to the latest survey-grade <br />receivers and base stations with sub-centimeter accuracy. We also manage our own Continuously <br />Operating Reference Station (CORS) located at our office which is partnered with Trimble Navigation. <br />This CORS, along with continually upgrading our field equipment, provides the ability to provide our <br />clients with survey solutions faster, more accurately and at less cost. Types of GPS surveys usually <br />are Project Network Control (field monumentation for localized survey networks) or Regional GPS <br />Survey Control for large scale projects. <br />Laser Scanning <br />We often use 3D laser scanning to prepare topographic and as-built surveys of roadways, parking <br />lots, buildings, utility plants and interiors of most any structure. The scanner will capture every <br />aspect needed for design purposes in a point cloud of laser data, consisting of millions of 3D points. <br />From this data we are able to prepare an AutoCAD drawing from any aspect in extreme detail in <br />either 2D or 3D formats. This procedure consists of establishing survey control points at strategic <br />locations around the property in an X-Y-Z format. With these control points set, the 3D scanner can <br />then be positioned on, or near each of these controls and tied down to orientate the laser point <br />clouds collected in the field. Multiple scanning <br />positions are run that capture horizontal and <br />vertical point positions in an X-Y-Z format <br />detailing the facility. Then those scanned points <br />will be registered together to form a seamless <br />overall point cloud of the subject improvements. <br />Each scanner position will capture everything in <br />a 360-degree arc around the scanner in a 100- <br />200-foot radius buffer, above and below the <br />scanner along with digitally registered <br />photographs of each area scanned. These <br />points are then extracted and imported into an <br />AutoCAD Civil3D base for preparation of the <br />drawing. <br />Utilization of Existing Data or Management Systems <br />Our staff utilizes a multitude of existing data systems to manage different projects. We utilize our <br />accounting system (Deltek 7.5) to manage t he budget and the time from individual employees <br />throughout the project, it provides regular updates and alerts by email to run the project efficiently. <br />We utilize ArcGIS to collect existing data from City, County, and State agencies within the areas we <br />are surveying to help organize and define the limits and the surrounding property information. We <br />use various surveying software and hardware packages to do the Survey field and office operations <br />as cost effectively as possible. And we utilize various governmental sites to access records and <br />plans available for land information. <br /> <br />D | Page 13
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