Road SurveyLIDAR data used for State Highway Surveys
The utilisation of both LIDAR and conventional ground survey data is a great benefit to engineers & contractors when contemplating engineering sites where access to the ground is not easy.
For example where existing batter slopes cannot be surveyed on foot or the terrain is lightly clad with trees & scrub, LIDAR comes into its own. In the example shown, we have successfully integrated both Reflectorless total station & LIDAR data sets. To do this we transform the LIDAR data from NZ Transverse Mercator projection to our local grid & apply a height correction based on comparisons made over flat areas between the two sources. 12d software has many utility functions allowing us to statistically analyse the data along the way.
The end result is engineers can confidently produce designs that will stand up to the test of construction setting out i.e. no surprises upon cutting steep batters etc. It also gives engineers & contractors a 3d view of the existing road & surrounding topography from the office desk enabling them to make good decisions. Information is again the key!
Come and talk to us about what data suits your requirements.
Occupation drawingWith the introduction of electronic surveys (Landonline e-survey), we have reviewed the outputs of that system in respect of our client’s needs and have found we need to supplement information so it is quite clear where the title and easement boundaries are in relation to physical ground features.
The sample drawing shown is uploaded to the Landonline database for inclusion in the e-survey documents. In addition this plan can be sent to you to assist you with selling your land, or simply for your own personal record. The Landonline option unfortunately at this time does not offer colour, but we certainly can give you this option.
Small Rural Resource ConsentThis is an illustration of a typical small rural subdivision resource consent plan. The overlay of a colour aerial photo assists the reader interpret more easily where boundaries are to be located, and we frequently email drafts to our clients in this format so they can make comments and changes as required. The right-hand panel gives detailed information about how the subdivision is to be structured, what engineering work will be required etc.
Small-Infill SubdivisionThis is an example of a small 2 lot infill subdivision (we call it infill as the underlying land has probably been subdivided for residential purposes some time prior). This plan was produced as a preliminary document so the two parties who own the land could resolve between themselves how they were to divide the land for the future.
Urban Infill Resource ConsentHere is a typical 2 lot residential infill resource consent plan that would be used to obtain subdivision resource consent from Council. The plan gives explicit information so the physical constraints etc. are highlighted, and practical means are described to deal with legal and engineering matters as required. It also provides tradesmen with the specification and detail they require to complete their work.
Urban Road SurveyHere is a typical urban road survey that was done to enable an upgrade of the existing road surface, kerbs, and drainage. This data is emailed to designers and acts as the basis for redesign.
Urban Road Survey IIAnother example of an urban road survey showing height contours, features in conjunction with a colour aerial image.
Urban SubdivisionHere is an example of a site survey that was undertaken to provide the design base for an urban residential development in Katikati. A combination of GPS & total station were used to collect the data and aerial photography was acquired to assess the vegetation and produce concept designs.
Hydro Electric Invest PlanThis plan was produced to enable a feasibility study to be done on a possible hydro-electric scheme in the Waitomo District. The height contours have been overlaid on ortho-photography (image corrected for ground slope & scale distortions).
Hydro Electric Invest X SectionsHere are some cross-sections that were plotted to assess the need for blasting and earthworks where a canal is proposed.
Hydro Electric Invest-Long-SectionThis longitudinal section was produced to enable engineers to determine the likely gradient of the proposed canal structure in the Waitomo area.