# GeoJsonUrlVectorSource *** A GeoJSON URL source is a layer that is populated from a GeoJSON file at a remote URL. These sources are ones that have not been uploaded to and processed by Felt, and as such\ their capabilities are limited. For instance, they cannot be filtered, nor can statistics be fetched for them. ## Properties ### type > **type**: `"geoJsonUrl"` Identifies this as a GeoJSON URL source. *** ### url > **url**: `string` The remote URL of the GeoJSON file used to populate the layer. *** ### refreshInterval? > `optional` **refreshInterval**: `null` | `number` The interval in milliseconds between automatic refreshes of the GeoJSON. The value must be in the range of 250ms - 5 minutes (300,000ms). If the value is `null`, the GeoJSON will not be refreshed automatically. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://developers.felt.com/js-sdk-api-reference/layers/geojsonurlvectorsource.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.