Update spatial-analysis-operations.md

Author: Juliako

articles/azure-video-analyzer/video-analyzer-docs/spatial-analysis-operations.md

@@ -242,7 +242,7 @@ See an example of [Person Distance Operation](https://raw.githubusercontent.com/
 | ------------------------- | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `zones`                     | list    | List of zones.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `name`                      | string  | Friendly name for this zone.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
-| `polygon`                   | string  | Each value pair represents the x,y for vertices of polygon. The polygon represents the areas in which people are tracked or counted. The float values represent the position of the vertex relative to the top-left corner. To calculate the absolute x, y values, you multiply these values with the frame size. threshold float Events are egressed when the person is greater than this number of pixels inside the zone. The default value is 48 when type is `zonecrossing` and 16 when time is `DwellTime`. These are the recommended values to achieve maximum accuracy. |
+| `polygon`                   | string  | Each value pair represents the x,y for vertices of polygon. The polygon represents the areas in which people are tracked or counted. The float values represent the position of the vertex relative to the top-left corner. To calculate the absolute x, y values, you multiply these values with the frame size. `threshold` float events are egressed when the person is greater than this number of pixels inside the zone. The default value is 48 when type is `zonecrossing` and 16 when time is `DwellTime`. These are the recommended values to achieve maximum accuracy. |
 | `trigger`           | string     | The type of trigger for sending an event. Supported values are event for sending events when the count changes or interval for sending events periodically, irrespective of whether the count has changed or not.                                                                                                                                                                                                                                                                                                                                                     |
 | `focus`                     | string  | The point location within person's bounding box used to calculate events. Focus's value can be footprint (the footprint of person), bottom_center (the bottom center of person's bounding box), center (the center of person's bounding box). The default value is footprint.                                                                                                                                                                                                                                                                                               |
 | `threshold`                | float   | Events are egressed when the person is greater than this number of pixels inside the zone.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
@@ -291,7 +291,7 @@ See an example of [Person Count Operation](https://raw.githubusercontent.com/Azu
 | ------------------------- | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `zones`                     | list    | List of zones.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `name`                      | string  | Friendly name for this zone.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
-| `polygon`                   | string  | Each value pair represents the x,y for vertices of polygon. The polygon represents the areas in which people are tracked or counted. The float values represent the position of the vertex relative to the top-left corner. To calculate the absolute x, y values, you multiply these values with the frame size. threshold float Events are egressed when the person is greater than this number of pixels inside the zone. The default value is 48 when type is `zonecrossing` and 16 when time is `DwellTime`. These are the recommended values to achieve maximum accuracy. |
+| `polygon`                   | string  | Each value pair represents the x,y for vertices of polygon. The polygon represents the areas in which people are tracked or counted. The float values represent the position of the vertex relative to the top-left corner. To calculate the absolute x, y values, you multiply these values with the frame size. `threshold` float events are egressed when the person is greater than this number of pixels inside the zone. The default value is 48 when type is `zonecrossing` and 16 when time is `DwellTime`. These are the recommended values to achieve maximum accuracy. |
 | `outputFrequency`           | int     | The rate at which events are egressed. When outputFrequency = X, every X event is egressed, ex. outputFrequency = 2 means every other event is output. The outputFrequency is applicable to both event and interval.                                                                                                                                                                                                                                                                                                                                                     |
 | `trigger`                   | string  | The type of trigger for sending an event. Supported values are event for sending events when the count changes or interval for sending events periodically, irrespective of whether the count has changed or not.                                                                                                                                                                                                                                                                                                                                                           |
 | `focus`                     | string  | The point location within person's bounding box used to calculate events. Focus's value can be footprint (the footprint of person), bottom_center (the bottom center of person's bounding box), center (the center of person's bounding box). The default value is footprint.                                                                                                                                                                                                                                                                                               |