Once we our permanent control was in place it was necessary to install retrotargets around the site in order to quickly ‘free station’ in a convenient manner. This involves moving the total station to a new and unknown position and re-measuring 2 or 3 targets, thus allowing the device to locate itself.
With all topographical surveys we typically begin in an area and move across the site gradually picking up all relevant details. In this instance, John started in the top corner of the park where the total station could resection using our nail positions and therefore survey retrotargets across the site accurately within the survey radius.
The park was particularly busy and it was imperative that the total station was securely locked to a fixed object, in this case a large tree. Keeping the device in a minimal number of locations away from paths ensures the risk of theft or damage is significantly reduced.
With no requirement for specific or uncommon survey data, we surveyed the standard items including kerb lines, surface changes, fence positions, tree sizes and locations and street furniture etc. Our client requested spot heights to 2.5m centres so this was done at the end of the works using a reference line which ensures neatness.
A second visit was required in order for John to pick up all of the survey data required. We always ensure our clients are happy with the drawings we produce and understand that some jobs are larger than others and can’t always be completed in a single day.
However, our surveyors relish the opportunity to survey a variety of sites and this particular job turned out to be a pleasant break from the usual residential or rural projects.
All in all this survey was a success and we hope our services will benefit the community of Ponders End as the regeneration of the district continues.