Description
Distinguish an absent properties member, JSON null, and a properties object; reject any other present value.
Feature properties and foreign members are JSON metadata, distinct from the geometry coordinates. Exact key operations and ID type checks can preserve useful distinctions, but do not independently authenticate records or validate an entire Feature.
Distinguish an absent properties member, JSON null, and a properties object; reject any other present value.
When to use this tool
Use Feature Properties Absent Versus Null when you need a literal GeoJSON metadata, identifier, or shallow-key operation.
How to use the tool and how it works
- Enter featureJson. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read state. Use the output convention below.
Require a parsed object with type Feature. Distinguish an absent properties member, JSON null, and a properties object; reject any other present value.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| featureJson | Feature Json | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| state | State | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"featureJson": "{\"type\":\"Feature\",\"geometry\":null}"
},
"output": {
"state": "absent"
}
}Limitations and assumptions
- The absent state is a diagnostic, not confirmation that the Feature satisfies GeoJSON requirements. Geometry, IDs, and object-wide validity are not checked.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Validate the complete Feature and its intended data model after editing. Preserve identifier precision and distinguish null values, absent members, collisions, and nested properties explicitly.
References
Similar or alternative tools
- Feature Properties Single Key Removal
Parse a properties object, test whether key exists as an own member, remove that exact top-level key if present, and serialize the remaining entries.
- Feature Property JSON Null Replacement
Parse a properties object, record whether key exists as an own member, remove its old entry if present, and append the key with JSON null before serializing.