BE-VLG: campaigns 2018-2026, and a real field id - #233
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This was referenced Sep 11, 2026
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The Flemish portal keeps every campaign from 2018; the catalog published 2023 onwards. Adding the older ones turned up three things, two of which were true of the editions already published: - **REF_ID references the parcel, not the field.** A row is one crop declared on it, so it repeats whenever a parcel carries more than one: 183 references over 367 of the 515,747 rows of 2018, one of them winter barley and winter wheat on the same 0.6238 ha, another the same crop twice. It is published as `block_id` now and the row index identifies the field, which is safe because an edition is one layer of one file. 2023 repeated it 15 times and 2026 1,800 times, so this is not only about the old campaigns. - **The 2026 GeoPackage carries a QGIS `layer_styles` table** beside the parcels, and its single row was read as a field. It never reached the published file, but only because the empty-geometry guard dropped it at the end — luck, not filtering. - **The 2020 archive** holds a GeoPackage whose name is not the archive's (`Landbouwgebruikspercelen2020_igb15-05_uitgebreid_(toestand_19-03-2021).gpkg` inside `..._2020_uitgebreid_toestand_19-03-2021_GPKG.zip`), and its text is cp1252, not UTF-8: a byte no UTF-8 decoder accepts kills the read before the first row. Every other value in that file is ASCII, so cp1252 costs nothing, and it is set for that campaign only. - **The 2020 GeoPackage also declares "Undefined geographic SRS"** while holding Lambert 72 metres, which put 258615.94 in the STAC extent as an east longitude and built the Hilbert grid from a global extent. The CRS is set where the source leaves it out. All nine editions are built and published: 515,747 fields in 2018 to 597,088 in 2026, 5,109,729 field-years, unique ids throughout. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DVx9uQV2QPM8ecPAY3ZjXG
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Handle variability over years.
REF_IDis the reference parcel.