Any ''geocode system'' [[#Systems of regular grids|based on regular grid]], in general is also a shorter way ofto express a latitudinal/longitudinal coordinate. But moregeocode of thamover 6 digits geocodecharacters is difficult for remember. ByOn the other hand, a [[#Systems of standard names|geocode based on standard name]] (or abbreviation or the complete name) is easyeasier to remember.
So, this suggestsuggests that a "mixed code" can be solve the problem, reducing the number of digitscharacters when a name can be used as "context" of the grid-based geocode. For example, in a book where the author saysays "all geocodes here are contextualized by the chapter's city". In the chapter about Paris, where all places have Geohash with prefix <code>u09</code>, it can be removed — for instance Geohash <code>u09tut</code> can be reduced to <code>tut</code>, or, by an explicit code for context "FR-Paris <code>tut</code>". It is only possible when the context resolution (e.g. translation from "FR-Paris" to the prefix <code>u09</code>) is well-known.
In fact a methodology exists for [[#Hierarchical grids|hierarchical grid-based geocodes]] with non-variable size, where the code prefix describes a broader area, which can be associated with a name. So, it is possible to shorteningshorten by replacing the prefix to the associated context. The most usual context is an official name. Examples:
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The examples of the ''Mixed reference'' column are significantly easier than remembering ''DGG code'' column. The methods vary, for example OLC can be shortened theby elimination of its first four digits<ref>{{Cite web|url=https://github.com/google/open-___location-code/wiki/Guidance-for-shortening-codes|title = Guidance for shortening codes · google/Open-___location-code Wiki|website = [[GitHub]]}}</ref> and using [[Plus Codes]] naming conventions.<ref>But PlusCodesPlus isCodes are not generated by an open-source algorithm, it uses a [[Black box]], see https://stackoverflow.com/q/58489357/287948</ref>
When the mixed reference is also short (9 characters in the second example) and there are a syntax convention to express it (suppose <code>CP‑PR~bgxed</code>), this convention is generating a new [[#Name-and-grid systems|name-and-grid geocode system]]. This is not the case of the first example because, strictly speaking, "Cape Verde, Praia" is not a code.
