# Geometry difference

> Supported in: Batch, Faster, Streaming

Calculates the portion of geometry a that is not intersecting geometry b.

**Expression categories:** Geospatial

## Declared arguments

* **Geometry a:** Geometry a.<br>*Expression\<Geometry>*
* **Geometry b:** Geometry b.<br>*Expression\<Geometry>*

**Output type:** *Geometry*

## Examples

### Example 1: Base case

**Argument values:**

* **Geometry a:** `geometry_a`
* **Geometry b:** `geometry_b`

| geometry\_a | geometry\_b | **Output** |
| ----- | ----- | ----- |
| {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[\[0.25,0.25],\[0.5,0.25],\[0.5,0.5],\[0.25,0.5],\[0.25,0.25]]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]],\[\[0.25,0.25],\[0.5,0.25],\[0.5,0.5],\[0.25,0.5],\[0.25,0.25]]]} |
| {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.5,0.0],\[0.5,1.0],\[0.0,1.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[\[0.5,1.0],\[1.0,1.0],\[1.0,0.0],\[0.5,0.0],\[0.5,1.0]]]} |
| {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[\[5.0,5.0],\[5.0,6.0],\[6.0,6.0],\[6.0,5.0],\[5.0,5.0]]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} |
| {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"LineString","coordinates":\[\[0.0,0.0],\[0.0,1.0]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} |

***

### Example 2: Edge case

**Argument values:**

* **Geometry a:** `geometry_a`
* **Geometry b:** `geometry_b`

| geometry\_a | geometry\_b | **Output** |
| ----- | ----- | ----- |
| {"type":"Point","coordinates":\[0.0,0.0]} | {"type":"Point","coordinates":\[0.0,0.0]} | {"type":"Point","coordinates":\[]} |
| {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"Polygon","coordinates":\[\[]]} |
| {"type":"Point","coordinates":\[0.0,0.0]} | {"type":"LineString","coordinates":\[\[0.0,0.0],\[0.0,1.0]]} | {"type":"Point","coordinates":\[]} |
| {"type":"LineString","coordinates":\[\[0.0,0.0],\[0.0,1.0]]} | {"type":"Polygon","coordinates":\[\[\[0.0,0.0],\[0.0,1.0],\[1.0,1.0],\[1.0,0.0],\[0.0,0.0]]]} | {"type":"LineString","coordinates":\[]} |

***