Rapid caching method for large-scale remote sensing image

The invention discloses a rapid caching method for a large-scale remote sensing image, belongs to the field of remote sensing visualization, mainly aims at the large-scale remote sensing image, and provides a remote sensing image data caching method based on a memory block. The method comprises the steps: carrying out the layered and segmented storage of the remote sensing image in a memory at different resolutions; building the relation of layer, row and column of the corresponding image blocks, and carrying out the dynamic scheduling of memory blocks, thereby remarkably increasing the loading and browsing speed of the large-scale remote sensing image. A memory caching layer is disposed in a bottom data reading and rendering pipe, thereby reducing the reading frequency of a magnetic disc,wherein the reading speed of the memory is about 100 times higher than the reading speed of the magnetic disc. Therefore, after the memory caching mechanism is added, a system can greatly improve thereading efficiency of cac