I'm trying to configure MapServer to serve a Cloud Optimized GeoTIFF (COG) through WMS service and would like to fully leverage the advantages of this format (tiled access, improved performance, etc.).
I currently have a basic Mapfile working, but I'm not sure if I'm correctly configuring the specific parameters for optimal COG performance without implying conversions.
My current Mapfile:
MAP DEBUG 5 CONFIG "CPL_DEBUG" "OFF" CONFIG "MS_ERRORFILE" "/tmp/logs/ortofoto_2025.log" DEFRESOLUTION 96 EXTENT -8238903.705 519346.255 -8238464.290 519797.026 FONTSET "../templates/font.list" SYMBOLSET "../templates/symbols.sym" IMAGETYPE "png24" NAME "Ortofoto 2025" RESOLUTION 96 SIZE 808 884 STATUS ON UNITS DD OUTPUTFORMAT NAME "GEOTIFF" DRIVER "GDAL/GTiff" MIMETYPE "image/tiff" IMAGEMODE RGB EXTENSION "tif" END PROJECTION "init=epsg:3857" END WEB METADATA "distance_units" "MS_METERS" "mapmanager_version" "1.1.0.0" "coordsys_name" "WGS 84 / Pseudo-Mercator" "ows_contactperson" "Samuel Mesa" "ows_keywordlist" "ortofoto2021" "ows_city" "Bogotá" "ows_srs" "EPSG:4686 EPSG:4326 EPSG:9377 EPSG:3857 EPSG:9377 EPSG:6247" "distance_units" "MS_METERS" "ows_contactposition" "Profesional SIG" "ows_contactelectronicmailaddress" "[email protected]" "wms_service_onlineresource" "https://localhost" "wms_stateorprovince" "Bogotá D.C." "wms_role" "Profesional SIG" "wms_title" "Servicio WMS Ortofoto" "wms_country" "Colombia" "wms_onlineresource" "https://localhost/mapserv/?map=ortofoto2021" "wms_fees" "Ninguno" "wms_enable_request" "*" "wms_format" "image/geotiff" "wms_encoding" "ISO-8859-15" "wms_contactinstructions" "Vía correo electrónico" "wms_accessconstraints" "Aplica licencia de datos abiertos de IDECA" "wms_abstract" "Servicio WMS Ortofoto." END IMAGEPATH "/tmp/" TEMPPATH "/tmp/" END LAYER NAME "ortofoto2021" TYPE RASTER DATA "ortofoto2021.tif" STATUS on PROCESSING "BANDS=1,2,3" PROCESSING "SCALE=AUTO" PROCESSING "CLOSE_CONNECTION=IF_FINAL" PROCESSING "LINESCAN=OFF" PROJECTION "init=epsg:3857" END EXTENT -8238903.705 519346.255 -8238464.290 519797.026 METADATA "wms_srs" "EPSG:3857" "wms_title" "Ortofoto 2021" "wms_enable_request" "*" END END END I'm seeking guidance on the optimal MapServer configuration to efficiently serve a GeoTIFF COG through WMS. Specifically, I need to know what additional GDAL CONFIG parameters are required for proper COG format handling, whether I should include specific PROCESSING directives in the LAYER section to optimize tile reading, if the current OUTPUTFORMAT and WMS metadata configuration is appropriate to leverage COG advantages, what specific metadata I should add to improve service discovery, and what are the best practices for parameters like EXTENT and SIZE when working with this format.
