Cartesia CAD: DXF & Markup

Cartesia CAD is a dedicated mobile CAD workspace designed for civil, mechanical, and architectural engineers, contractors, and surveyors to inspect, measure, markup, and export 2D DXF drawings directly on Android devices without requiring an internet connection.

Built for field job sites and office review, Cartesia CAD focuses on coordinate accuracy, offline privacy, and comprehensive drawing inspection tools.

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### 🔹 Key Application Features:

📐 1. 2D DXF Drawing Viewer:
• Smooth rendering of 2D DXF vector geometry based on Cartesian coordinate systems.
• Multi-touch pan, zoom, fit to drawing extents, and 90-degree view rotation.
• High-contrast Site Mode for outdoor readability under direct sunlight.
• Dark Blueprint mode and Light mode for comfortable day and night viewing.
• Interactive scale bar and customizable coordinate reference grid.

📂 2. Layer Management:
• Full layer visibility control (toggle individual layers on or off).
• Quick search across layer names.
• Inspect layer color properties, entity counts, and structural hierarchy.

🎯 3. Snapping Engine & Precision Measurements:
• Geometric snapping to Endpoints, Midpoints, Centers, and Intersections.
• Point-to-point linear distance and cumulative polyline path measurements.
• 3-point angle calculation in degrees.
• Closed polygon area and perimeter calculations.
• Circle and arc radius measurements.
• Dedicated Measurement List screen to review, delete, and export records to CSV.

✏️ 4. Engineering Markup & Annotation Suite (12 Tools):
• Freehand pencil drawing tool.
• Straight lines, directional arrows, and double-ended dimension arrows.
• Rectangles, ellipses, and revision clouds.
• Translucent highlighter for identifying drawing areas.
• Inspection approval checkmarks (✓) and defect/issue crosses (✗).
• Text notes and location pins with coordinate markers.
• Selection mode: Move markups with touch, rotate at any angle, or remove items.
• Full Undo / Redo history with local SQLite persistence for every drawing.

📄 5. Multi-Format Export & Sharing:
• Export vector PDF sheets featuring an architectural Title Block with project name, author, date, scale, and notes.
• High-resolution PNG image export including CAD geometry, annotations, and measurements.
• Export measurement tables to CSV format for use in spreadsheet applications.
• Direct sharing of native DXF files with desktop CAD software.

🔒 6. Privacy & Completely Offline Operation:
• 100% offline functionality — no cloud servers, no account creation, no telemetry.
• Files remain strictly on your local device storage.
• Direct file opening from messaging apps (WhatsApp, Telegram), email attachments, and local file managers via Android Storage Access Framework (SAF).
• Full bilingual interface with English and Arabic language support.