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This article is about what map slicing means in GIS development. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Map images are generally made into slices (tiles), released, and viewed on the client's two-dimensional and three-dimensional map, so that the client can view smoothly.

Map slicing is generally cut according to the way of web Mercator, represented by Google, Gaud and osm are also cut according to this; China's surveying and Mapping Bureau heaven and earth map is cut according to wgs84, of course, the surveying and Mapping Bureau is rich in resources, but also according to Mercator's coordinate system to cut.

Mercator is generally scaled to the minimum level, is a square map form, the highest is a piece, the size is 256 "256, the beginning of the map level is some 0, some are 1, the horizontal and vertical numbers are 0rewgs84 longitude and latitude, it is a rectangular way, the width is twice the height, the highest slice is generally in accordance with two pieces, the size is also 256" 256, the horizontal direction is 0, the vertical direction is divided into 0, 1.

Some of the center points of the slice map are different, with the upper left corner and the lower left corner, resulting in different kinds of slice numbers.

Slicing formats such as jpg and png,JPG are relatively small, but if, as a separate annotation layer, the layer is transparent except for annotations, you need slices in png format.

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