A city government has an area that will be under construction with a new housing development. The contractor needs access to high-quality imagery in the construction zone. The contractor will need the remainder of the imagery at a lower quality in order to overlay existing roads, etc. The city has an existing composite MrSID Generation 3 (MG3) mosaic of MrSID imagery created from 100 smaller MG3 images compressed at a ratio of 20:1. The city will import a vector overlay that outlines the area of construction and would like to specify a lossless compression ratio in this area (i.e. no additional loss after original 20:1 compression) and an additional 20:1 compression for the remainder of the image in order to reduce the file size of the deliverable and still meet the contractor's needs.
The United States Department of Defense (DoD) requires as a measure against terrorism that imagery over the nation’s capital building and White House in Washington, DC, not be delivered in high resolution. In the past data providers have downsampled those areas of the images and mosaicked them back together, which can be time consuming. A data provider would like to load the mosaic of original TIFF files into GeoExpress, select a region, apply a 100:1 compression ratio over the selected region and 20:1 compression for the remainder of the mosaic.
A Paris city employee working in the field with low bandwidth wants to view an extremely large image of Paris online through a viewing application. She is only interested in the portion of the image that shows the Eiffel Tower. If that portion of the image has been defined as an area of interest, it can be given display priority so that that area appears sooner, becoming crisp and clear before the rest of the image.