fyi --------------------------------------------------------
http://landsat.usgs.gov/about_LU_Vol_8_Issue_3.php#1a In September, the following changes will be made to the Metadata (MTL) file distributed with the Landsat Level 1 data products: Remove Padding (Extra Lines) This change will remove the extra lines that are currently at the end of the MTL file, which were historically used to distribute a fixed-size file to support the HDF4 format. Since GeoTIFF is now the only data format provided, the bytes at the end of the file are not needed, and the extra lines will be removed. Samples of the modified MTL files are available to download from http://landsat.usgs.gov/documents/remtlpaddingchangestexttoreview.zip. (4.77 KB) Ground Control Point (GCP) versioning to be added to Landsat MTL File The version number of the GCPs used to register an image will be recorded in the MTL file following the next processing system release in September 2014. The Landsat Project is improving the ground control points (GCPs) used to georegister Landsat products. The much higher geolocation accuracy of Landsat 8 makes it possible to significantly improve the absolute accuracy of Landsat data products for all Landsat sensors. For more information about the phased GCP Improvement Plan with details on the Phase 1 GCPs to be released in September, please see the July 1, 2014, headlines at http://landsat.usgs.gov/mission_headlines2014.php. The new metadata parameter will only be provided for any scene that processes to a Level 1 Precision and Terrain-Corrected (L1T) product (PRODUCT_TYPE = "L1T"). The metadata parameter names for the GCP versioning are provided below: Group name: IMAGE_ATTRIBUTES Parameter name: GROUND_CONTROL_POINTS_VERSION GCP versioning and the release of the Phase 1 GCPs take effect with Landsat Level 1 Product Generation System (LPGS) releases identified below and all future releases: PROCESSING_SOFTWARE_VERSION = “LPGS_2.4.0” for Landsat 8 products PROCESSING_SOFTWARE_VERSION = "LPGS_12.5.0" for Landsat 1-7 products L1T products created in prior releases will not have the versioning field. See the Landsat L1 Data Format Control Books (DFCB) for more information about the MTL files (http://landsat.usgs.gov/tools_project_documents.php). Users can use the GCP version in combination with GCP release notes to determine which scenes are impacted with each version number. A list of the 171 path/rows with GCPs updated in GCP Improvement Phase 1 (GROUND_CONTROL_POINTS_VERSION =”2”) can be found here. All images for path/rows updated in Phase 1 will be removed from the online storage and will be reprocessed. We recommend reordering all images associated with Phase 1 path/rows. Guidance for future releases will be provided at the time of their release. ----- best regards Helmut -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Landsat-Metadata-MTL-File-Changes-Coming-September-2014-tp5155145.html Sent from the Grass - Dev mailing list archive at Nabble.com. _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
