1. A method for simplifying spatial data, comprising: transforming original coordinates of original spatial data into view coordinates in a view window according to a preset view control parameter, wherein an original coordinate point of the original spatial data corresponds to a view coordinate point in a coordinate system of the view window; determining whether there are view coordinate points corresponding to a same pixel in the view window determined according to the preset view control parameter; if there are view coordinate points corresponding to a same pixel in the view window, determining whether no other pixel is to be plotted between two view coordinate points among the view coordinate points corresponding to the same pixel; and if no other pixel is to be plotted between the two coordinate points, simplifying the original coordinate points corresponding to the two view coordinate points, comprising removing one of original coordinate points corresponding to the two view coordinate points.