Dioptra Longitud Teknik AB is a professional construction surveying company with over 20 years of experience in the field.

As our core expertise, we offer surveying services for all types of constructions, including services for residential, commercial and industrial developments, road and rail works.

Dioptra Longitud Teknik AB specializes in supporting digital workflows in construction industry. We create highly accurate 3D models of work sites in the digital realm and digital terrain models* for all types of constructions.

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We deliver digital assets for your BIM workflow. We gather 2D and 3D data using high-quality optics and high-resolution cameras on unmanned aerial vehicles (drones) and state-of-the-art 3D laser scanners to capture "as is" models of your worksite in present condition.

Our skilled experts can help you and your clients with all your topographic surveying tasks and various inspection and construction planning workflows, according to your needs.

*All our terrain measurements adhere to quality control procedures, checked in accordance with the local Swedish standard SIS-TS 21144:2016.