Simon Legner

The JOSM Editor

Current Development and Data Validation Using MapCSS


JOSM is a Java-based offline editor for OpenStreetMap, which has been around since. A recurring challenge for editors is validating user input, guiding mappers towards making as few mistakes as possible.

This talk will provide insights in the current development. Emphasis will be on the usage of MapCSS for data validation which has been developed in the recent months.

About the author

Simon Legner has been a JOSM developer, an OSM mapper, and is a computer scientist.