Glue point maps

Algorithm

The Glue point maps operation glues or merges two or more point maps into one output map. By default, the output map then comprises the area of all input maps. The domains of the input maps are merged when needed.

Rules:

To copy point from the input maps into the output map, the following rules are applied:

the class names, IDs or values of the input points must match the specified mask, and
the input points must fall within the specified clip boundary.

By default, all points are copied into the output map.

By default, coordinate boundaries for the output map are determined from the coordinate boundaries of all input maps. When the coordinate systems of the input maps are different but compatible, the point coordinates will be transformed to the coordinate system of the first input map.

Output domain:

When merging two maps with the same domain, the output map will also use that domain.
When merging Value maps, the value range for the output map is determined by the smallest minimum and the largest maximum of all input maps; the precision is determined by the smallest precision of all input maps.
When merging Class maps or ID maps that do not have the same domain, a new output domain is created which contains all domain items, i.e. all classes. The new domain is either stored as a separate object, or is stored by the output map (internal domain).