You may think from the content of this site that we would like to complete lidar surveys for you. However we do not own or operate a laser scanner ! So what can we do for you ?

Because of our independence we can give professional advice and assistance to both the providers and purchasers of laser scanning services.

We can source lidar surveys for you based on an independent appraisal of your requirements and the providers capabilities.

QUALITY CONTROL - Merrett Survey Partnership have completed a large amount of quality control work, for both Government and private sector organisations, including confirmation and analysis of data accuracy. This is undertaken using ground survey methods, so we obtain realistic practical results (not just theoretical accuracies). We have developed specialist software to deal with the very large data quantities that aerial laser scanning generates.

Understanding the intricacies of ellipsoids, map projections and height datums is essential for the accurate analysis of the data. You must compare 'like with like'. We have witnessed people dismiss lidar as 'inaccurate' when the only fault was a mis-understanding of the geodesy involved.

MAXIMISING QUALITY - From our experience of analysing the data, why not reverse the process ? Ensure that you are obtaining the best accuracies and the best quality data before someone checks your data.

TRANSFORMATIONS AND GEOID / ELLIPSOID MODELLING - Aerial laser scanner systems compute positions and heights using GPS. The GPS system uses the WGS84 ellipsoid to reference it's heights. If you want to accurately convert these heights to a more usable geoidal height (eg height above sea level), then you need an accurate model of the geoid, local to your area of interest. You also need to tools to convert the huge data quantities from one system to the other.