# Vector Layer Properties Features within the vector layer have both a geometry and properties. The properties a feature can have depend on the properties that are declared for the layer. In this section you can find how to declare new properties and alter old ones. When you upload a file to a layer for the first time, the properties found in the file are automatically added to the layer. --- # 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://docs.ellipsis-drive.com/developers/api-v3/path-vector/vector-layer-properties.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.