# JMap DGN V7 - V8 File reader

<table data-header-hidden><thead><tr><th width="193.5"></th><th></th></tr></thead><tbody><tr><td>Read</td><td>Yes</td></tr><tr><td>Write</td><td>No</td></tr></tbody></table>

JMap Server can read DGN version 7 and 8 files as a spatial data source. Select the data source type that is appropriate for your DGN files’ version. DGN files are generally produced by Bentley MicroStation.

DGN files are often paired with a database of attributes. This can be an MS Access database or any other database system. If the DGN files have attributes stored in a separate database, you must first configure a database connection pool for that database before proceeding. See [Creating Databases](/en2/administrator/jmap-server-administrator-manual/databases/creating-databases.md) for more information on database connection configuration.

<table data-header-hidden><thead><tr><th width="197.5"></th><th></th></tr></thead><tbody><tr><td><strong>Parameters</strong></td><td> </td></tr><tr><td>Selected files</td><td>Select one or more DGN files to read. If selecting more than one file, all files must have the same list of attributes and geometries must be of the same type.</td></tr><tr><td>Convert polygons to lines</td><td>Check this option if you want polygons to be read as lines.</td></tr><tr><td>Attribute database</td><td>Optionally, select the database that contains the attributes. This database must be already configured in JMap Admin.</td></tr><tr><td>Layers</td><td>Select one or more layers to include in the data source. Data on other layers will not be read.</td></tr></tbody></table>


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