Alibaba Group Holding Limited
Raster Data Access Method, Apparatus, Electronic Device, and Computer Storage Medium

Abstract:

A method, an apparatus, an electronic device, and a computer storage medium for accessing raster data are provided. The raster data access method comprises: executing a corresponding window query input to determine a target pixel resolution corresponding to a query window according to a raster data access request; calculating a sampling level according to the target pixel resolution and a stored pixel resolution of a raster object, and determining whether the sampling level is greater than a threshold; and accessing raster data corresponding to the query window according to a column-level index if the sampling level is greater than the threshold, the column-level index being an index generated by down-sampling according to raster data of the raster object in a column. Using the raster data access method can achieve quick access to raster data.