Convert OVL to KML

Understanding OVL and KML file formats

OVL files are typically used in mapping and navigation applications, especially in older or specialized GIS (Geographic Information System) software. They often contain vector data such as points, lines, and polygons, representing map overlays or annotations. The format is not standardized and may vary depending on the software that created it.

KML (Keyhole Markup Language) is a widely used XML-based format developed by Google for displaying geographic data in applications like Google Earth and Google Maps. KML files can store points, lines, polygons, images, and other geographic features, making them ideal for sharing and visualizing spatial data.

Why convert OVL to KML?

Converting OVL to KML allows you to use your map overlays in modern mapping tools such as Google Earth, making your data more accessible and shareable. KML is also supported by a wide range of GIS and mapping applications, ensuring better compatibility and visualization options.

How to convert OVL to KML

Since OVL is a less common and sometimes proprietary format, direct conversion tools are rare. The process usually involves importing the OVL file into GIS software that supports it, then exporting or saving the data as KML.

Recommended software for OVL to KML conversion

• OziExplorer: A popular mapping software that supports OVL files. You can import your OVL file, then use File → Save As or Export options to save the data in a more common format (such as GPX or SHP), which can then be converted to KML using other tools.
• QGIS: A free and open-source GIS application. If you can convert your OVL file to SHP or GPX using OziExplorer, you can then use QGIS to open the file and export it as KML via Project → Import/Export → Export Project to KML.
• GPSBabel: Useful for converting between various GPS and mapping formats. If your OVL file is supported, you can use GPSBabel to convert directly to KML.

Step-by-step conversion process

1. Open your OVL file in OziExplorer.
2. Export the data to a supported format like GPX or SHP using File → Export.
3. Open the exported file in QGIS.
4. Export the layer as KML using Layer → Export → Save Features As and select KML as the format.

Tips and considerations

• Check the compatibility of your OVL file with the chosen software, as OVL implementations may differ.
• Always verify the converted KML file in Google Earth or another KML viewer to ensure data integrity.
• If you encounter issues, consider reaching out to GIS forums or communities for assistance with specific OVL variants.