geom command adds a field, named "geom", to each event. This field contains geographic data structures for polygon geometry in JSON. These geographic data structures are used to create choropleth map visualizations.
For more information about choropleth maps, see "Mapping data" in the Dashboards and Visualizations manual.
geom [<featureCollection>] [featureIdField=<string>] [gen=<double>] [min_x=<double>] [min_y=<double>] [max_x=<double>] [max_y=<double>]
- Syntax: <geo_lookup>
- Description: Specifies the geographic lookup file that you want to use. Two geographic lookup files are included with Splunk platform:
geo_countries. You can install your own geographic lookups from KMZ files. See Usage for more information.
- Syntax: featureIdField = <field>
- Description: If the event contains the featureId in a field named something other than "featureId", use this option to specify the field name.
- Syntax: gen=<double>.
- Description: Specifies generalization, in the units of the data. For example,
gen=0.1generalizes (reduces the size of) the geometry by running the Douglass Puiker Ramer algorithm on the polygons with a parameter of 0.1 degrees.
- Default: 0.1
- Syntax: min_x=<double>
- Description: The X coordinate for the bottom-left corner of the bounding box for the geometric shape. The range for the coordinate is -180 to 180. See Usage for more information.
- Syntax: min_y=<double>
- Description: The Y coordinate for the bottom-left corner of the bounding box for the geometric shape. The range for the coordinate is -90 to 90.
- Syntax: max_x=<double>
- Description: The X coordinate for the upper-right corner of the bounding box for the geometric shape. The range for the coordinate -180 to 180.
- Syntax: max_y=<double>
- Description: The Y coordinate for the upper-right corner of the bounding box for the geometric shape. The range is -90 to 90.
To use your own lookup, you must define the lookup in the
You specify the name of the lookup stanza in the
transforms.conf file for the
featureCollection argument. Set
external_type=geo in the stanza. See
Configure geospatial lookups in the Knowledge Manager Manual.
When no arguments are provided, the
geom command looks for a field named
featureCollection and a column named
featureIdField in the event. These fields are present in the default output from a geoindex lookup.
max_y arguments are used to clip the geometry. Use these arguments to define a bounding box for the geometric shape. You can specify the minimum rectangle corner (
min_y) and the maximum rectangle corner (
max_y). By specifying the coordinates, you are by definition returning only the data within those coordinates.
lookup geo_countries latitude as lat, longitude as long | stats count by featureIdField as country | geom geo_countries featureIdField="country"
... | geom geo_us_states featureIdField="state" gen=0.1 min_x=-130.5 min_y=37.6 max_x=-130.1 max_y=37.7
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This documentation applies to the following versions of Splunk® Enterprise: 6.3.0, 6.3.1, 6.3.2, 6.3.3, 6.3.4, 6.3.5, 6.3.6, 6.3.7, 6.3.8, 6.3.9, 6.3.10, 6.3.11, 6.3.12, 6.3.13, 6.3.14