Sea-land attribute judgment method and device for massive position points

The invention discloses a sea-land attribute judgment method and device for massive position points. The method comprises the following steps: acquiring longitude and latitude coordinates of the position points; coding the longitude and latitude coordinates of the position point based on a GeoHash algorithm to obtain a GeoHash code corresponding to the position point; searching whether a GeoHash code corresponding to the position point exists in a data container or not; if the GeoHash code corresponding to the position point does not exist, determining that the sea-land attribute of the position point is land; if the GeoHash code corresponding to the position point exists, obtaining a relation value corresponding to the GeoHash code corresponding to the position point; if the relation value is the first data value, determining that the sea-land attribute of the position point is ocean; and if the relation value is the second data value, determining the sea-land attribute of the position point according to whe