1. A method comprising: accessing a geospatial layer data set for a first geographic area defined by a first presentation level, the geospatial layer data set for the first geographic area including a limited geospatial artifact data set for geospatial artifacts located within the first geographic area, the limited geospatial artifact data set for geospatial artifacts located within the first geographic area being a subset of a complete geospatial artifact data set maintained by a geospatial mapping system; providing the geospatial layer data set for the first geographic area to a client device, the client device using the geospatial layer data set for the first geographic area to present a visual rendering of the first geographic area, the limited geospatial artifact data set included in the geospatial layer data set for the first geographic area enabling the client device to provide a limited feature set for interacting with the geospatial artifacts located within the first geographic area; receiving, from the client device, a request to store a subset of geospatial artifacts located within the first geographic area; in response to receiving the request to store the subset of geospatial artifacts located within the first geographic area, promoting, to the geospatial layer data set for the first geographic area, an additional geospatial artifact data set for the subset of geospatial artifacts, yielding an updated geospatial layer data set for the first geographic area, the updated geospatial layer data set including at least one geospatial artifact data item from the complete geospatial artifact data set maintained by the geospatial mapping system that was not included in the subset of the complete geospatial artifact data set, the at least one geospatial artifact data item from the complete geospatial artifact data set being automatically included in a geospatial artifact data set for a second geographic area that is a subset of the first geographic area, wherein the updated geospatial artifact data set enables the client device to provide at least a first additional feature not included in the limited feature set; and providing the updated geospatial layer data set for the first geographic area to the client device, the additional geospatial artifact data set included in the updated geospatial layer data set.