Tree Surveys - CDO/2025/263

Tender description

The Council requires citywide tree surveys to be carried out, alongside the creation of a comprehensive tree asset register/database, which can then be uploaded onto the Council's GIS mapping system (by the council). The data to be collected will vary depending on tree location and land ownership. The project will involve reviewing existing information-including GIS maps, Google Maps, databases, and Land Registry data-and setting up new records on a site-by-site or plot-by-plot basis. All surveyed trees must undergo verification through site visits and cross-referencing with relevant Council teams including Property Management, Planning, Streetcare, Greenspace Area Managers, and Tree Officers to ensure accuracy before finalising and storing the data. The estimated number of trees to be surveyed is 330,194, based on the Council's GIS tree canopy layer. However, this figure is not definitive due to potential double-counting across LOTS, incomplete data for certain land types (e.g. highways), and exclusions such as private trees that are not deemed a risk to public areas. Additionally, mapping tolerances may affect accuracy, so submitted prices must allow for some variation in tree numbers. The pricing and specification is structured into multiple LOTS, categorised by land types or groups of land types, enabling the Council-subject to budget constraints-to either commission all LOTS or select specific ones at this stage.