Connect your data to
known geography.

Choose or drop a file to begin.

Files are limited to 5 MB in this light browser preview and cached only in this browser for up to 12 hours so sign-in and reload do not break the workflow. Clear removes the cached file. CSV files are streamed locally; TSV, Excel, and OpenDocument spreadsheets are opened locally so you can choose a worksheet when needed. Column names are compared locally with public data-pack signatures. During identification, the browser excludes obvious URLs, long prose, and empty columns, then sends column names and 32 deterministic representative values from the remaining bounded scalar columns to the Geography MCP. The MCP selects recognized geography columns or coordinate pairs without opening identifier indexes. You select an uncertain column and give one country before its identifiers are checked for a reference system and level. DaedalMap returns ranked interpretations and asks you to confirm real ambiguity. The free 100-row preview includes those same 32 reviewed rows, and a full-file run supports up to the browser's configured row limit, sent in batches within each tool's published per-call limit. Converting the full file sends row numbers and values from only the confirmed identifier column, or only the coordinates for a coordinate file; all other columns stay in the browser and are merged into the download locally. Local MCP runs use their own limits. The coordinate preview resolves up to 100 valid points as deep as available through Admin 3, while the map shows the same bounded representative rows reviewed during identification.