TRACES import error · EUDR
TRACES GeoJSON import: "Expected double-quoted property name in JSON" — how to fix it
If your GeoJSON is rejected with SyntaxError: Expected double-quoted property name in JSON at position 149 (line 6 column 77), the file is not valid JSON — the import fails in the browser before TRACES even looks at the geometry. The position numbers move with your file; the constant part is Expected double-quoted property name in JSON. Verified verbatim-identical on acceptance builds 8.2.0.1 and 8.2.0.2.
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Files never leave your browser · no upload
Why you get "Expected double-quoted property name in JSON"
JSON requires every property name to be wrapped in double quotes and forbids trailing commas. Files exported or hand-edited from Excel, Python dictionaries or JavaScript often use single quotes, unquoted keys, or a stray comma after the last item. The browser's JSON.parse stops at the first offending character — the reported position — and TRACES surfaces the raw SyntaxError.
Because it fails at parse time, there is no map, no area, no partial import — just the error.
Fix it in DDSpass
DDSpass runs the file through jsonrepair: it adds the missing double quotes, removes trailing commas and closes brackets, then validates the result against the EUDR GeoJSON File Description. You get a TRACES-ready file plus a report of what was broken. Stuck on a format instead? See Excel, KML and Shapefile imports. Nothing is uploaded — the repair happens in your browser.
Questions
What does "Expected double-quoted property name in JSON" mean?
Your JSON has a property name that is not wrapped in double quotes (or a trailing comma before it). It is a syntax error, so the file cannot be parsed until it is repaired.
The position number is different in my error — does it matter?
No. The position (and line/column) just points at where parsing failed in your specific file. The fix is the same: repair the JSON syntax.