Monday, October 10, 2011

Caching (GWC) Imagery

Issues I've run into while caching imagery on Geoserver/GWC
  • Out of Memory Errors (java.lang.OutOfMemoryError: PermGen space): Solved this (as suggested here) by adding -Xms48m -Xmx256M -XX:MaxPermSize=128m to Geoserver's startup.bat/ on the line that starts the JVM (for me it was line 120)
  • also found a post suggesting adding UseCompressedOops fixed some issues with caching imagery ... from
"%RUN_JAVA%" -DGEOSERVER_DATA_DIR="%GEOSERVER_DATA_DIR%" -Djava.awt.headless=true -DSTOP.PORT=8079 -DSTOP.KEY=geoserver -jar start.jar
"%RUN_JAVA%" -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSClassUnloadingEnabled -Xms48m -Xmx512M -XX:MaxPermSize=256m -XX:+UseCompressedOops -DGEOSERVER_DATA_DIR="%GEOSERVER_DATA_DIR%" -Djava.awt.headless=true -DSTOP.PORT=8079 -DSTOP.KEY=geoserver -jar start.jar

  • ERROR [seed.MTSeeder] - Problem communicating with GeoServer : was getting this error because a DB parameter had recently changed (DB name)
  • Error ... Could not list layers for this store, an error occurred retrieving them ... then something about null argument ... this was also fixed with these memory options
  • I also found it necessary to scale down my imagery using the outsize parameter  with gdal translate
gdal_translate -of GTiff -co "TILED=YES" -outsize 50% 50% input-file.tif output-file.tif

  • I think I may also have been having trouble not adding a world file (possibly prj) which I then created with ArcGIS (not sure how to do that with GDAL, since that saves the geographic info directly to the TIFF)

Wednesday, October 5, 2011

JQuery Each Iterator

Is your each iterator not working on an Array? Try constructing the array as an object instead. Jquery v1.3.2