> ## Documentation Index
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> Use this file to discover all available pages before exploring further.
# ST_DWithin
Tests whether two geographies are within a given geodesic distance (in meters) of each other on the sphere. The minimum great-circle distance between any two points on the two geographies is compared against the threshold; the test is inclusive (returns true when the minimum distance equals the threshold).
## Signatures
```sql theme={"system"}
ST_DWithin (A: Geography, B: Geography, distance: Double)
```
## Parameters
The first geography.
The second geography.
The maximum geodesic distance, in meters.
## Return type
`true` if A and B are within `distance` meters of each other.
## Example
```sql theme={"system"}
SELECT ST_DWithin(
ST_GeogFromWKT('POINT (0 0)', 4326),
ST_GeogFromWKT('POINT (0 1)', 4326),
200000.0
);
```
```
true
```
The same pair of points with a tighter threshold:
```sql theme={"system"}
SELECT ST_DWithin(
ST_GeogFromWKT('POINT (0 0)', 4326),
ST_GeogFromWKT('POINT (0 1)', 4326),
100000.0
);
```
```
false
```