mirror of https://github.com/apache/druid.git
60 lines
1.6 KiB
Markdown
60 lines
1.6 KiB
Markdown
---
|
|
layout: doc_page
|
|
---
|
|
Druid supports filtering specially spatially indexed columns based on an origin and a bound.
|
|
|
|
# Spatial Indexing
|
|
In any of the data specs, there is the option of providing spatial dimensions. For example, for a JSON data spec, spatial dimensions can be specified as follows:
|
|
|
|
```json
|
|
"dataSpec" : {
|
|
"format": "JSON",
|
|
"dimensions": <some_dims>,
|
|
"spatialDimensions": [
|
|
{
|
|
"dimName": "coordinates",
|
|
"dims": ["lat", "long"]
|
|
},
|
|
...
|
|
]
|
|
}
|
|
```
|
|
|
|
|property|description|required?|
|
|
|--------|-----------|---------|
|
|
|dimName|The name of the spatial dimension. A spatial dimension may be constructed from multiple other dimensions or it may already exist as part of an event. If a spatial dimension already exists, it must be an array of coordinate values.|yes|
|
|
|dims|A list of dimension names that comprise a spatial dimension.|no|
|
|
|
|
# Spatial Filters
|
|
The grammar for a spatial filter is as follows:
|
|
|
|
```json
|
|
"filter" : {
|
|
"type": "spatial",
|
|
"dimension": "spatialDim",
|
|
"bound": {
|
|
"type": "rectangular",
|
|
"minCoords": [10.0, 20.0],
|
|
"maxCoords": [30.0, 40.0]
|
|
}
|
|
}
|
|
```
|
|
|
|
Bounds
|
|
------
|
|
|
|
### Rectangular
|
|
|
|
|property|description|required?|
|
|
|--------|-----------|---------|
|
|
|minCoords|List of minimum dimension coordinates for coordinates [x, y, z, …]|yes|
|
|
|maxCoords|List of maximum dimension coordinates for coordinates [x, y, z, …]|yes|
|
|
|
|
### Radius
|
|
|
|
|property|description|required?|
|
|
|--------|-----------|---------|
|
|
|coords|Origin coordinates in the form [x, y, z, …]|yes|
|
|
|radius|The float radius value|yes|
|
|
|