Macrostrat is part of a broad geoinformatics ecosystem. These are the systems and organizations we exchange data or identifiers with, and what flows in each direction. Systems that only consume our data are apps; organizations that fund the work are on the support page. Some appear in more than one place.

• Geologic surveys publish most of the maps Macrostrat integrates. In the United States, the USGS National Geologic Map Database is a primary source of maps and metadata, and its Geolex lexicon defines many of the stratigraphic concepts names are linked to (see Geologic lexicon).
• The International Commission on Stratigraphy maintains the international chronostratigraphic chart, which anchors Macrostrat's timescale and Age model.
• EarthByte and GPlates provide plate rotation models that Macrostrat uses, through its Corelle rotation service, to place maps and columns in their positions in deep time.
• xDD provides access to the geologic literature, the source of Macrostrat's Knowledge graph.

These systems hold site-based records that gain stratigraphic and age context from Macrostrat, and in turn enrich its units (see Linking data):

• the Paleobiology Database (fossil occurrences);
• the Sedimentary Geochemistry and Paleoenvironments Project (geochemical proxy records);
• ocean-drilling cores, compiled into Macrostrat columns through the eODP project;
• StraboSpot, a field data system with which Macrostrat shares an open-source software ecosystem.

Macrostrat's Data services provide geologic context to many applications, including Rockd, StraboSpot, Mindat, iNaturalist, Flyover Country and Mancos, as well as museum exhibits, geological surveys and individual researchers.

If your data system shares ground with Macrostrat, in stratigraphic names, geologic time, map units, localities or literature, we would like to link up. Shared identifiers are the usual starting point. Write to us.