# Site change · Use cases · Dscvry

> Site change: drone and aerial images of the same site compared over time, with structures, vehicles, stockpiles and ground changes flagged as new, moved or...

Source: https://dscvryai.com/use-cases/site-change/

# What changed at this site since last week?

Images of the same site compared week by week, so what is new, moved or missing is flagged with the before and after side by side.

See it worked through ·

1. [Home](https://dscvryai.com/)
2. [Use cases](https://dscvryai.com/#use-cases)
3. Site change

## Two images. Spot the difference.

Drone and aerial images of a site pile up every week. Comparing them by eye is slow, and a small change in one corner is easy to miss.

### Too many images.

Each pass over a site produces hundreds of frames, and few are ever compared with the last one.

### Never quite the same.

Light, season, angle and shadow change between passes, and look like change when they are not.

### Change without proof.

When something is noticed, the before and after are rarely kept together as evidence.

## What the AI reads.

Every new image of a site lined up with earlier images of the same ground, and compared area by area.

### In

- Drone imagery
- Aerial and satellite images
- Earlier images of the site
- Site plans and boundaries
- Planned works and schedules
- Previous findings

### At work

1. [Sense](https://dscvryai.com/technology/sense/) Lines up the new image with earlier ones of the same ground, correcting angle and scale.
2. [Understand](https://dscvryai.com/technology/understand/) Finds structures, vehicles, stockpiles and ground changes in each image.
3. [Check](https://dscvryai.com/technology/check/) Compares the two dates and separates real change from light, season and shadow.
4. [Operate](https://dscvryai.com/technology/operate/) Raises each change with its before and after crops for an analyst to confirm.

### Out

A list of changes at the site, each with its before and after.

## Every change found. Every change shown.

The analyst sees what is new, moved or missing at the site since last week, with the before and after crops beside each one.

Site B · The reasoning ·

Site B · Image of 14 October compared with 7 October Illustrative

5 changes · 1 new · 1 moved · 2 to review · 1 cleared

| Change | What | Result | Detail | Area |
|---|---|---|---|---|
| C-1 | Structure, about 12 m by 6 m | New | Not in last week’s image; ground cleared beside it | North yard |
| C-2 | Stockpile of material | Smaller | Covers about half the area it did last week | Storage area |
| C-3 | Two trucks | Moved | By the gate last week; now at the loading bay | Loading bay |
| C-4 | Fence section, about 20 m | Missing | No longer visible on the east boundary | East boundary |
| C-5 | Dark patch on the ground | Cleared | Cloud shadow, checked against the other images from that pass | South field |

Illustrative example. Site, images, dates and changes are fictional.

## Built for imagery analysts.

The AI compares the images. Analysts confirm what changed.

### Every change shows its proof.

The before and after crops sit side by side for every flag.

How Check works
https://dscvryai.com/technology/check/

### About the site, not people.

Changes are to structures, vehicles, stockpiles and ground. People are not identified or tracked.

How Sense works
https://dscvryai.com/technology/sense/

### Runs offline.

Images can be processed inside your own environment, offline or air-gapped.

Deployment options
https://dscvryai.com/#deployment

## Same records. Other questions.

The documents and data behind this work answer other questions too.

Is anyone where they shouldn’t be?

### Perimeter breaches

Catch people and vehicles crossing the line, day or night.

See how →
https://dscvryai.com/use-cases/perimeter-breaches/

What changed in the reporting overnight?

### Overnight reporting

Read reports and feeds in many languages, and brief what changed, with sources.

See how →
https://dscvryai.com/use-cases/overnight-reporting/

What here isn’t safe?

### Safety checks

Flag what’s unsafe or incomplete.

See how →
https://dscvryai.com/use-cases/safety-checks/

More in Defence
https://dscvryai.com/#use-cases

Every use case
https://dscvryai.com/use-cases/

## Bring us two passes over the same site.

We’ll show you what changed between them, with the before and after for each change.

[Talk to us →](https://dscvryai.com/contact/?topic=Site%20change%20inquiry)

**London**Discovery AI Limited · United Kingdom

**Hyderabad**ReDscvry Technology Private Limited · India

**Chennai**ReDscvry Technology Private Limited · India