> For the complete documentation index, see [llms.txt](https://docs.aeroai.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aeroai.io/siega-web-features/tools/measurements.md).
# Measurements
The Measurement tool lets you measure distances, areas, circles, volumes, and coordinates directly on the globe. It
opens as a side panel from the Top Toolbar and keeps a running list of every measurement you take.
### How to Use
Click "Measure" in the Top Toolbar to open the Measurement Tools panel on the right.
The panel lists the available tools at the top, your unit selector below the header, and the running Measurements list
at the bottom.
#### Choosing a Unit
A unit toggle sits below the panel header showing "ft", "m", "mi", and "km".
Click the unit you want to use and every distance and area in the panel will update to that unit.
#### Measuring a Distance
Click "Measure" in the tool list to expand the submenu, then click "Distance".
Click points on the globe to place each segment, and right click to finish the line so the total length appears in the
Measurements list.
#### Measuring an Area
Expand "Measure" and click "Area" to start an area measurement.
Click points on the globe to outline the shape and right click to close the polygon so the area appears in the list.
#### Measuring a Circle
Expand "Measure" and click "Circle" to start a circle measurement.
Click once on the globe to set the center, then click again to set the edge so the radius and area appear in the list.
#### Measuring a Volume
Expand "Measure" and click "Volume" to open the Volume Tool panel in place of the measurement panel.
Click points on the globe to outline the polygon and right click to finalize the shape with at least three points.
#### Choosing the Settings
Choose "Stockpile" or "Cut / Fill" under Mode depending on whether you want a single pile volume or a net cut and fill comparison.
Choose "Constant" or "Interpolated" under Baseline so the tool knows how to set the reference surface. Constant uses the lowest perimeter point for the
whole polygon, and Interpolated weights the perimeter heights so the baseline tilts with the surrounding ground.
Type a value into "Grid Res." in meters to control the sample density. The panel shows an estimated sample point count and a time estimate underneath the
field, and the text turns yellow once the grid passes ten thousand points so you can dial it back if you want a faster run.
Choose "Metric" or "Imperial" under Units to control how the results are formatted.
Running the Compute
Click "Compute Volume" to start the calculation. The button label will change to "Computing..." and stay disabled until the run finishes.
A progress bar appears below the button and steps through each stage so you can see what the tool is doing. The stages are "Sampling perimeter...",
\
"Generating grid...", "Sampling heights...", "Computing volume...", and "Generating heatmap...".
If the grid is over ten thousand points, a toast notification will pop up that reads "Computing \~N points, please wait, this may freeze briefly" and stay
on screen until the run completes. Leave the panel alone while this is up since the browser may stall for a moment during the heavy sampling stage.
The Results section shows the headline number first. Stockpile mode shows "Stockpile Volume" and "Cut / Fill" mode shows "Net Volume" which is cut minus
\
fill.
Below that you will see "Cut Volume" and "Fill Volume" broken out, plus "Polygon Area", "Min Delta", and "Max Delta" so you can sanity check the surface
\
against the baseline.
Click "JSON" or "CSV" under the results to download the breakdown to your computer. The export includes the polygon vertices, the settings you used, and
\
every result value.
### Capturing a Coordinate
Click "Coordinates" in the tool list to start coordinate capture.
Click anywhere on the globe to drop a marker, and the latitude and longitude will appear in the Measurements list.
### Showing the Coordinate HUD
Click "Coordinate HUD" in the tool list to turn on the live readout under your cursor.
Move the cursor over the globe and the latitude, longitude, and elevation will follow the pointer in real time.
#### Reviewing and Deleting Measurements
The Measurements list at the bottom of the panel shows each finished measurement with its type, point count, and
\
value.
Click the trash icon next to a measurement to delete that single entry from the globe and the list.
Click "Clear All" at the bottom of the tool list to wipe every measurement at once.
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