Introduction

    In the Netherlands it is mandatory for soil investigating companies to upload and register CPT data (Cone Penetration Test) at the BasisRegistratie Ondergrond (a public institute). The BRO expects the data to be delivered in the socalled BRO-XML format.

     Since july 1st 2025 socalled "bronhouders" have to convert their historical stored CPT-GEF data (Geotechnical Exchange Format) to BRO-XML and deliver this to the BRO. For this conversion and transfer of data a period of 5 years is mentioned in which this should happen.

    This website makes it possible to convert GEF-CPT files to the BRO-XML format. The automatic generated BRO-XML files are according to the latest BRO standards and will be accepted by the "bronhouderportaal".

    The XML standard originates from 1990 and has been designed with the following ideas in mind : platform independancy, human readable form and a hierarchical structure. However for the processing of CPT data the GEF-CPT format is still used. Because of that this website can also convert the other way around : from BRO-XML to GEF-CPT.

    In the generated PDF file you will find graphical presentations of all measured parameters. TXT files contain information about conversion progres and validation. A standard Excel file (XLSX) shows all measured data organised as rows and columns.

    After receiving files in GEF-CPT or BRO-XML format (zipped or unzipped) a confirmation mail will be sent immediately. When finished conversion the generated (and original) files will be delivered before the next working day.

    If you are interested in underlying theory or used techniques there is more to read under Technical. Examples of generated files can be viewed under Examples. Of course you can also directly request a conversion under GEF-CPT to BRO-XML and BRO-XML to GEF-CPT

    This service is offered free of charge. Improvements, remarks or comments are greatly appreciated and can be sent to p.s.tilma@knid.nl

Team www.cptdata.nl