Environment Variables¶

This is a list of environment variables supported by osgEarth.

Caching:

OSGEARTH_CACHE_PATH:

Sets up a cache at the specified folder (path)

OSGEARTH_CACHE_ONLY:

Directs osgEarth to ONLY use the cache and no data sources (set to 1)

OSGEARTH_NO_CACHE:

Directs osgEarth to NEVER use the cache (set to 1)

OSGEARTH_CACHE_DRIVER:

Sets the name of the plugin to use for caching (default is “filesystem”)

Threading/Performance:

OSG_NUM_DATABASE_THREADS:

Sets the total number of threads that the OSG DatabasePager will use to load terrain tiles and feature data tiles.

OSG_NUM_HTTP_DATABASE_THREADS:

Sets the number of threads in the Pager’s thread pool (see above) that should be used for “high-latency” operations. (Usually this means operations that do not read data from the cache, or are expected to take more time than average.)

Debugging:

OSGEARTH_NOTIFY_LEVEL:

Similar to OSG_NOTIFY_LEVEL, sets the verbosity for console output. Values are DEBUG, INFO, NOTICE, and WARN. Default is NOTICE. (This is distinct from OSG’s notify level.)

OSGEARTH_MP_PROFILE:

Dumps verbose profiling and timing data about the terrain engine’s tile generator to the console. Set to 1 for detailed per-tile timings; Set to 2 for average tile load time calculations

OSGEARTH_MP_DEBUG:

Draws tile bounding boxes and tilekey labels atop the map

OSGEARTH_MERGE_SHADERS:

Consolidate all shaders within a single shader program; this is required for GLES (mobile devices) and is therefore useful for testing. (set to 1).

OSGEARTH_DUMP_SHADERS:

Prints composed shader programs to the console (set to 1).

Rendering:

OSGEARTH_DEFAULT_FONT:

Name of the default font to use for text symbology

OSGEARTH_MIN_STAR_MAGNITUDE:

Smallest star magnitude to use in SkyNode

Networking:

OSGEARTH_HTTP_DEBUG:

Prints HTTP debugging messages (set to 1)

OSGEARTH_HTTP_TIMEOUT:

Sets an HTTP timeout (seconds)

OSG_CURL_PROXY: Sets a proxy server for HTTP requests (string)

OSG_CURL_PROXYPORT:

Sets a proxy port for HTTP proxy server (integer)

OSGEARTH_CURL_PROXYAUTH:

Sets proxy authentication information (username:password)

OSGEARTH_SIMULATE_HTTP_RESPONSE_CODE:

Simulates HTTP errors (for debugging; set to HTTP response code)

Misc:

OSGEARTH_USE_PBUFFER_TEST:

Directs the osgEarth platform Capabilities analyzer to create a PBUFFER-based graphics context for collecting GL support information. (set to 1)