Knowledge base
Articles & Guides
Practical guides on image measurement, floor plan reading, and getting accurate real-world dimensions from photographs and technical drawings.
How to Calibrate the Scale of an Image to Measure It
Learn what image scale calibration is, why every measurement depends on it, and how to set it in MetricCanvas with a line or a circle diameter.
Read article →How to Measure Distances on an Image Online
Use the MetricCanvas measure tool to draw lines on a photo or plan, read real lengths, keep exact angles and label each measurement.
Read article →How to Measure the Diameter or Radius of a Circle on an Image
Use the circle tool to measure round objects on photos and plans — tables, pipes, columns, tanks or roundabouts — by diameter or by radius.
Read article →MetricCanvas Navigation and Keyboard Shortcuts
Every way to move around the infinite canvas: trackpad, Magic Mouse, mouse wheel, touch and keyboard shortcuts for zoom, pan and drawing.
Read article →How to Upload Plans and Photos and Work with Layers
Drag and drop images anywhere, compare several plans on one canvas, reorder layers and keep your work saved automatically in the browser.
Read article →How to Export Your Measurements as PNG, CSV or Text
Share measured plans as images, open your measurements in Excel or Google Sheets, or paste a quick text summary into an email.
Read article →How to Verify Room Sizes from a Real Estate Floor Plan
Stated floor plan dimensions are often rounded, approximated, or simply wrong. Here's how to verify actual room sizes from a digital floor plan before signing anything.
Read article →How to Measure Distances in Satellite and Aerial Images
Satellite and aerial photographs contain measurable distances — if you know how to calibrate them. A guide to extracting real-world measurements from overhead imagery.
Read article →How to Measure from a Blueprint Without CAD Software
You don't need AutoCAD or Revit to extract dimensions from a blueprint. A practical guide to getting accurate measurements from a scanned or photographed architectural drawing.
Read article →How to Read a Scale Bar in Technical Drawings
A scale bar tells you exactly how to convert measurements on paper into real-world distances. Here's how to read one, use one, and what to do when you only have a digital copy.
Read article →Comment vérifier si un meuble rentrera avant de l'acheter
Comment vérifier qu'un meuble rentrera avant qu'il arrive — en utilisant des plans, des photos de la pièce ou des images d'annonces immobilières.
Read article →Plan vs Élévation : ce que montre chaque dessin
Ce que montrent plans, élévations et coupes, ce que vous pouvez mesurer dans chacun et comment utiliser MetricCanvas avec les trois types.
Read article →Comment mesurer une pièce sans mètre ruban
5 méthodes pratiques pour obtenir les dimensions d'une pièce sans mètre ruban — des objets du quotidien à la mesure directe depuis une photo ou un plan.
Read article →Mesurer une fenêtre à partir d’une photo
Estimez la largeur et la hauteur d’une fenêtre sur une photo à l’aide d’une référence connue et comprenez les limites de perspective.
Read article →Vérifier si un lit tient dans une chambre sur plan
Utilisez un plan et une dimension connue pour vérifier la place d’un lit et conserver un passage ainsi que l’ouverture de la porte.
Read article →