Compress your images and point clouds to decrease the size of the files. GeoExpress compresses your images and point clouds by default.
When you compress raster images with GeoExpress, you can specify a compression ratio, specify a target file size, use lossless compression, or use quantization for floating point images. If you decide to specify a compression ratio for a raster image, you can specify a separate compression ratio for each band in an image. When you compress LiDAR point clouds with GeoExpress, you can specify a compression ratio or use lossless compression.
If you specify a compression ratio or a target file size, GeoExpress uses lossy compression. When you use lossy compression, you compress an image to a much smaller file size by discarding some image data or removing points from a point cloud. Additionally, when you compress a floating point image, GeoExpress uses a lossy compression method called quantization to compress the image.
When you use lossless compression, you compress an image as much as possible without discarding any image data.