Autodesk 15606-011408-9008 User Guide - Page 102
Efficient Raster Formats, Tiled TIFFs, ECW Files, MrSID Files
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Format JPEG MrSID PNG TGA TIFF File Description Extension .jpg, .jpeg Joint Photographic Experts Group .sid Multi-Resolution Seamless Image Database .png Portable Network Graphic .tga TrueVision Targa 2.0 Format .tif, .tiff Tagged Image File Format Efficient Raster Formats Because raster images can be quite large, they can slow down performance. To improve performance significantly, use tiled TIFF files, ECW files, or MrSID version 1.6 files. Tiled TIFFs A tiled TIFF file allows Autodesk MapGuide to access only specific portions of the image. This greatly improves access speed, because Autodesk MapGuide Server does not need to load the entire image every time-just the specific portion requested. The difference in performance between using standard TIFF files and tiled TIFF files is dramatic. You can use Raster Workshop to generate tiled TIFFs from other raster file formats. ECW Files ECW, supported by ER Mapper, is a wavelet-based image compression format with high-quality results at high compression rates. MrSID Files MrSID (Multi-Resolution Seamless Image Database), supported by LizardTech, Inc., is a wavelet-based image compression format designed specifically for GIS to enable true portability of large images. Autodesk MapGuide supports MrSID version 1.6 format .sid files. 102 | Chapter 5 Working with Data in Autodesk MapGuide