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Data Annotation Tools

Lines and Arrows Annotation

Precisely annotate straight or curved objects with lines or polylines.

25% of Fortune 50 companies trust Sama to help them deliver industry-leading ML models

Highly Flexible Tool

Our lines and arrows tool allow our expert annotators to visualize point order when this is critical to your requirements.

Efficient Annotation Platform

Custom classifications, multiple attributes per instance, and hierarchical relationships are available to meet your exact ontology needs.

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Lines and Arrows Annotation Use Cases


Data accuracy — guaranteed when you boost your projects — compared to 88.5% for leading competitors.


Events tracked per month to improve our product and processes with A/B testing.


Lives impacted to date thanks to our purpose-driven business model.

High-Quality Training Data From
Start to Scale.