The survey data collected on the data collector with SurvCE software were exported in CSV format with Point Name, Easting, Northing and Elevation as the main outputs. The “Stakeout” feature in SurvCE software was used to mark the perimeter of the survey area shown in Figure 3 based on the coordinate’s entered. The coordinates obtained from Google Earth were entered into the SurvCE software. The Survey area provided by the client was plotted in Google Earth from where coordinates in WGS84 were obtained at each line break. Elevation of survey markers was supplied in the Australian Height Datum (AHD).ĭefining the actual survey area on the ground is complex, especially if dense vegetation or significant landscape features are present at the measurement site. Coordinates reported from AUSPOS GPS Processing Report shown in Figure 2 for both survey markers were in Geocentric Datum of Australia 1994 (GDA94). The recorded files were converted to RINEX format, from where it was submitted to AUSPOS Online GPS Processing Service. Two survey markers were established next to the proposed site using the GPS static survey technique with a minimum of two hours of raw GPS data collected at each of the survey markers. The second Hemisphere S321 or Rover was set up on a survey pole with the exact height of the GPS antenna entered into the SurvCE software. The coordinates and elevation of the survey marker and height of the GPS Antenna were entered into the SurvCE software to reference the survey against known datum. The first Hemisphere S321 or Base Station was setup precisely over a known survey marker using a tripod and tribrach. The configuration of the two Hemisphere S321 smart antennas and a topographic survey was performed using Carlson SurvCE software installed on the data collector.
The survey equipment selected for the RTK survey consisted of two Hemisphere S321 Smart Antennas and Data Collector. The survey technique used consisted of the RTK method, which required walking the survey site, while recording the necessary data points from a Rover GPS on a handheld data collector. A topographic survey of a section of property was required for the development of an access road with a focus on landscape features, farming infrastructure and existing utilities.