Converting ArcGIS layer style to Styled Layer Descriptor (SLD) file?

I am putting together a GIS server using GeoServer and need some help with importing my layer styles from ArcGIS 10 to SLD format.

I have one layer in ArcMap properly symbolized and labeled, how can I get this layers symbolization and labeling into a SLD file?

Answer

Arc2Earth

The Community Edition can only export single layers, you'll need to upgrade to Pro if you want create a single SLD file for your entire Map. After your selection, click on the Export button and you will be asked for a location to export to.

http://help.arc2earth.com/help/faqs/arc2earth-desktop/export-map-symbols-to-styled-layer-descriptor-sld