What does this converter produce?
Each readable spreadsheet row becomes a GeoJSON Point feature in EPSG:4326 longitude/latitude order. The optional plot-ID column is retained as the feature key so reviewers can reconnect the geometry to supplier and batch evidence.
Prepare the spreadsheet before conversion
Use one row per point, keep latitude and longitude in separate named columns, and use decimal-degree coordinates. Formulas, ambiguous columns, unsupported coordinate values, and oversized workbooks stop safely instead of producing a guessed result.
- Latitude must be between −90 and 90.
- Longitude must be between −180 and 180.
- Use a stable plot ID when several rows must be reconciled with other records.