Measure

Measure distances, routes, areas, and travel time on a Felt map.

Right-click the map and open Measure to measure distances and areas. Measure a straight line, a flight path, or a route by car, bike, or on foot, outline a polygon or circle to get its area and perimeter, or see the area you can reach in a set time. Results show in US or metric units, and you can switch one measurement to acres, hectares, or other units. Anyone who can open the map can measure in view or edit mode. To measure the selected annotations or layer feature, press M. With nothing selected, M starts measuring a line.

Measure a distance or area

1. Right-click the map where you want to start, and open Measure. On a phone, tap + and open Measure.

2. Select a measurement type. The first point appears where you right-clicked.

3. Click the map to add more points. The detail panel shows the running length or area.

4. Click Done in the detail panel.

Type	Measures	Shows
Line	A straight-line distance through the points you click	Length
Polygon	The area of a shape you outline	Area and perimeter
Circle	The area of a circle from its center	Radius, area, and perimeter
Route	A route along roads or paths, or a great-circle flight path, the shortest route over the Earth's surface	Length

For a route, click Drive, Bike, Walk, or Flight in the detail panel. Route measurements need a desktop browser.

To remove a measurement, select it and click the trash icon in the detail panel.

A measurement is visible only to you and disappears when you leave the map. To keep one, see Save a measurement.

Change measurement units

Measurements use US units (feet and miles) or metric units (meters and kilometers). To change the units for all measurements, open the Felt menu and click View > Units > US or Metric. The setting applies across all your maps and affects only your view.

To show one measurement in a specific unit, such as acres or hectares, select the unit in the dropdown next to its value in the detail panel. Felt uses that unit for your next measurements of the same type.

Measurement	Units
Length, radius, and perimeter	Feet, miles, meters, kilometers
Area	Square feet, acres, square miles, square meters, hectares, square kilometers

Felt doesn't measure in nautical miles or yards.

Measure travel time

Available on the Business and Enterprise plans. Compare plans

The Travel time measurement shows the area you can reach from a point by car, bike, or on foot. Right-click the map where you want to start, open Measure, and select Travel time. In the detail panel, click Drive, Bike, or Walk, and set the minutes in Time, from 1 to 120. The detail panel shows the area. Travel time needs a desktop browser. For a layer of travel-time areas around many places, see Spatial analysis.

Save a measurement

Saving a measurement needs Contribute or Edit access to the map. A saved measurement becomes an annotation that everyone with access to the map can see. In edit mode, select the measurement, click Add as in the detail panel, and select Annotation. Felt stores the measured value as an attribute, such as Area: 5.00 mi².

Annotations can also show their own length or area on the map as you draw them. See Edit annotations.

Layer breakdown

Available on the Business and Enterprise plans. Compare plans

The layer breakdown in the Measure tool shows what's inside a measured shape. Under the measured value, the detail panel lists each visible layer the shape reaches:

• A vector layer shows how many of its features touch a Polygon or Circle measurement.

• A raster layer shows the average value inside the shape, or the most common value for a categorical style.

To add a chart or the sum of an attribute's values, hover over the layer's section and click Add component. See Dashboards.

Profile a raster along a line

Available on the Business and Enterprise plans. Compare plans

An elevation profile charts a raster's values along a measured path, such as the elevation along a trail. You can create a profile for any raster band with the Measure tool.

1. Measure a Line or a Route across the raster layer.

2. In the raster layer's section of the detail panel, click Add component and select Line chart. The chart plots the value against distance along the line.

Hover over the chart to read a value and see its location on the line. Where the raster has no data, the profile leaves a gap.