Laserfiche WebLink
In total, the Consultant will acquire Mobile LiDAR data for approximately 9,140 linear corridor <br />feet, or 1.73 corridor miles of roadway. In addition, the Consultant will also collect the ten (10) <br />alleyways encompassed within the limits described above totaling approximately 5,100 linear <br />corridor feet, or 0.96 of a corridor mile. The total limits of this Project encompass approximately <br />2.69 corridor miles. <br />I. SCOPE OF CONSULTANT'S BASIC SERVICES <br />The Consultant will: <br />A. Project Control. Recover existing control provided by the City prior to beginning the <br />survey as well as check this control for accuracy. After checking the control, the Consultant will <br />set additional project control that will be utilized throughout the Project. The Consultant will set <br />monuments for this control in areas where minimal disruption is expected in order for it to be <br />useful during future surveys of this area. The Consultant will survey this control by conventional <br />traverse and differential leveling and will calculate final values and provide them in Grid. A <br />surface scale factor will not be derived by the consultant unless requested by the City. <br />B. Mobile UDAR Targets. For the purpose of data calibration, set a maximum of 42 <br />mobile LiDAR targets will be set on the site on the pavement, outside of the travelled way. <br />Mobile LiDAR targets will consist of chevrons painted onto the pavement. Refer to the diagram <br />below for reference. <br />The Consultant will survey these targets from the found and set project control by utilizing a mix <br />of GPS RTK surveying, conventional survey traverse and differential leveling. <br />C. Ground Truthing. For the purpose of checking the accuracy of the data, collect a <br />ground truthing cross section half way between mobile LiDAR targets. A maximum of 20 cross <br />CITY HALL ® 630 EAST HOPKINS ® SAN MARCOS, TEXAS 78666 0 512.393.8150 ® FACSIMILE 855.759.2846 <br />SANMARCOSTX.GOV <br />4 <br />