常见问题：为什么处理多分辨率无缝影像数据库 (MrSID) 文件会花费很长时间？

答案

Multiresolution Seamless Image Database (MrSID) is a proprietary lossy compression technique developed by LizardTech for maintaining the quality of large compressed raster data. Compressing the raster data reduces the file size for storage and improves the reading performance of the data since a reduced amount of data is being read or transferred. A raster data file of 40 GB can be compressed down to 2 GB as a .sid file.

However, when drawing or using a .sid file as an input for a geoprocessing tool such as the Mosaic To New Raster tool, the raster data must be decompressed, resulting in slower performance or taking a long time to process, depending on the uncompressed size of the file and the resources of the processing hardware. The more highly compressed the raster, the longer it takes to decompress.

Users can view the raster dataset properties of the file to identify the uncompressed size of the .sid file. For more information on raster dataset properties, see the following ArcGIS Help: Raster dataset properties.

Therefore, users are encouraged to use .sid files only for read-only functions. To process .sid files for display purposes, consider using alternative methods that do not require any geoprocessing tools. For example, instead of mosaicking a large amount of .sid files with the Mosaic To New Raster tool, bring the .sid files and group them into their own group layer instead. Users can also convert MrSID files to other formats using LizardTech's proprietary GeoExpress.

文章 ID:000016384

从 ArcGIS 专家处获得帮助

联系技术支持部门

下载 Esri 支持应用程序

转至下载选项

常见问题：为什么处理多分辨率无缝影像数据库 (MrSID) 文件会花费很长时间？

答案

相关信息

发现关于本主题的更多内容