# Edit Layer Data You can create, modify, or delete features in vector layers. You must have specific permissions for each type of editing operation in order for the corresponding functions to be enabled. ## Create a Feature To create a new feature: 1. Click the Create a new feature button in the map interface. The **Select the feature type to create** panel opens, and the corresponding icon appears in the sidebar.\ This panel lists all layers for which you have permission to create a feature.
2. Click the desired layer to select it, then click **Next** to open the **Create Geometry** panel. 3. Create the feature geometry according to its type. You can enable the [Snap](https://docs.jmapcloud.io/en/jmap-ng/jmap-ng-user-guide/measure-distances-and-areas#snap-tool) tool and select the layer to which newly created features will snap.
GeometryProcess
Point1. Click the desired location to place the point.
2. To reposition it, click and drag it to a new location.
Line1. Click to place the first point.
2. Click additional locations to add vertices.
3. Double-click to complete the line.
4. To modify it, click a vertex (it becomes highlighted) and drag it. Additional vertices appear between existing ones for finer adjustments.
Polygon1. Click to place the first vertex.
2. Click to add additional vertices.
3. Double-click to complete the polygon.
4. To modify it, click a vertex and drag it. Additional vertices appear for more precise adjustments.
4. Click **Next** to open the feature attribute form and, if permitted, attach documents. See the [Form](#form) section for details.
5. Click **Create** to finalize the feature. The feature appears on the map, and the **Select the feature type to create** panel closes automatically. ### Form The data entry and editing form for a layer may include several components: * **Layer Attributes (1)** – Fields used to describe the feature * **Subform (2)** – Table containing records associated with the feature * **Attachments (3)** – Section used to associate documents with the feature
#### Layer Attributes Attributes may be: * **Required (\*)** – The form cannot be saved without a value. * **Read-only** – These attributes cannot be modified. Accepted value types include: * Alphanumeric (text or number) * Date * Boolean (true/false) Input methods may vary: * Text or numeric fields * Single- or multi-select dropdown lists * Checkboxes or toggle switches #### Subform A layer may have non-spatial tabular data associated with its features. For example, a point layer representing air quality monitoring stations may be associated with a table containing pollutant concentration records measured on different dates. The subform allows you to add, modify, or delete records in the associated table. When creating a feature, you can complete the subform immediately or later when [editing the feature](#modify-a-feature). If you have the required permissions, the subform icons are enabled. **Add a record** 1. Click the Add icon to open the table form. 2. Enter the values in the form fields. 3. Click **Create**. The record appears in the table once the feature is created. **Edit a record** 1. Click the Edit icon to open the table form. 2. Modify the desired field values. 3. Click **Update**. The new values appear in the subform. **Delete records** 1. Select the records to delete. 2. Click the Delete icon. A confirmation message appears. #### Attachments If the form includes an attachment section and you have the required permissions, you can attach documents (images, PDF, Word, Excel files, etc.) or URLs. {% hint style="info" %} The maximum file size is 20 MB. {% endhint %} **Add an Attachment** 1. Click the Add icon to open the file upload or URL entry window. 2. Enter the **Subject** and **Description**. Attachments are grouped by subject. 3. Click **Save**. The attachments appear in the form. ## Modify a Feature You can modify a feature in an editable layer if you have the necessary permissions. 1. Click the feature to display its tooltip. If the layer is editable and you have the required permissions, the Edit icon appears in the tooltip.
2. Click the Edit icon . A window opens with the available options based on your permissions: * **Edit Geometry** * **Edit Information** * **Delete** 3. Select the desired type of modification. ### Edit Geometry 1. Click **Edit Geometry**, then click the feature to select it. The vertices of lines and polygons appear. 2. To move the feature, drag and drop it to the desired location. 3. To modify its shape, click a vertex and drag it. Additional vertices appear between existing ones for finer adjustments.
4. Click **Save** to apply the changes. ### Edit Information 1. Click **Edit Information** to open the form. 2. Modify the attribute values as needed. 3. If required, edit the subform as described in the [Subform](#subform) section. 4. Add, view, or modify attachments as needed (see the [View and Manage Attachments](#view-and-manage-attachments) section). 5. Click **Update** to save the changes. #### View and Manage Attachments If a feature form contains associated documents, you can view and manage them. Management icons appear when you hover over a document. * Click the Edit icon to modify document information. * Click the Delete icon to remove the document. To view documents: * Click a photo or image to enlarge it and display its subject and description. * Use the zoom controls to zoom in or out. * Click the Download icon to download the file. * Click the Panoramic icon to switch to panoramic mode (if available). * Click the Full Screen icon to display the image in full-screen mode. * Click the Exit Full Screen icon to return to the previous view. * Click the Close icon to close the image. ## Delete a Feature 1. Click **Delete** in the feature editing window. A confirmation message appears. 2. Click **OK**. The feature is removed from the layer.